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Konstantinos (Kostas) S.Voudouris Geologist-Mathematician

PhD Hydrogeologist

Associate Professor at the Aristotle University,

Dept. of Geology, Faculty of Natural Sciences

Candidate for the post of Professor in the Dept. of Geology,

Aristotle University of Thessaloniki, Greece

CURRICULUM VITAE

(CV)

Thessaloniki, Greece

June 2018

CONTENTS

BRIEF CURRICULUM VITAE (CV) 5

ANALYTICAL CURRICULUM VIATE

- STUDIES 11

- SOFTWARE USE 11

- CONFERENCES 12

- RESEARCH PROJECTS 15

- TEACHING EXPERIENCE 19

- SUPERVISION OF UNDERGRADUATE AND GRADUATE THESIS 20

- PUBLICATIONS 21

- BOOKS 30

- EVIDENCE OF ESTEEM- CITATIONS 33

BRIEF CURRICULUM VITAE (CV)

of Associate Professor Konstantinos Voudouris

PERSONAL INFORMATION

Place of birth: Korinthos, Greece

Date of birth: 21-7-1959

Nationality: Greek

Communication: Email: [email protected]

Tel.: +302310998041, +306973533461

Fax: +302310998530

Website: http://auth.academia.edu/KostasVoudouris

Scopus: Author Search: Voudouris, Initials of first name: K.S.

Aristoteleion Panepistimion Thessalonikis

Military obligations: In Airforce (speciality: Radar, 1983-1985)

Present post: Konstantinos Voudouris, Associate Professor, Lab. of Engineering Geology &

Hydrogeology, Aristotle University, Thessaloniki, GR54124, Greece

STUDIES

Undergraduate studies

Bachelor Degree in Geology, University of Patras (1978-1982)

Bachelor Degree in Mathematics, University of Patras (1986-1994)

Postgraduate studies

Doctoral Degree in Hydrogeology, Department of Geology, University of Patras, Greece

(1990-1994)

Postdoc studies, University of Patras (1999-2000)

Distinctions:

Foundation of State Scholarships (IKY) for the academic year 1990-1993 and 1999-2000

University of Patras.

RESEARCH

1990-1995 Doctoral Thesis (University of Patras) Parallel research activity at the Patras University 1997-1999 Researcher (National Technical University of Athens)

http://auth.academia.edu/KostasVoudouris

1999-2002 Postdoc Research (University of Patras) Parallel research activity at the Patras University 2003- 2008 Lecturer- Researcher at the Aristotle University of Thessaloniki, Department of Geology. 2008- 2014 Assistant Professor- Researcher at the Aristotle University of Thessaloniki, Department of Geology. 2014- today Associate Professor- Researcher at the Aristotle University of Thessaloniki, Department of Geology. Research Projects Participation in 28 (8 as Scientific Supervisor and Principal Researcher) European and National

projects during the last years concerning, hydrogeological studies, water quality and water

pollution, water supply issues, simulation of groundwater flow, vulnerability of aquifer systems,

artificial recharge, etc.

BOOKS

1) Environmental Hydrogeology (460 pages, in Greek)

2) Engineering Hydrogeology (429 pages, in Greek)

3) Exploitation and Management of Groundwater (654 pages, in Greek)

4) Water Quality: Monitoring and Assessment (Eds K. Voudouris, D. Voutsa)

5) Ecological water quality (Eds K. Voudouris, D. Voutsa)

PUBLICATIONS (in scientific journals and proceedings of conferences)

Total: 119

PhD Thesis: 1

International Journals: 34

Special chapters: 5

Greek scientific journals: 8

Bulletin of Greek Geological Society: 7

International Conferences (abroad): 13

International Conferences in Greece: 19

National Greek Conferences: 32

Unique Author: 12

First author: 39

Second Author: 39

Third or greater order: 29

Mean number of paper per year: ≈5

EVIDENCE OF ESTEEM- CITATIONS

460 citations (only from other authors) in my research work in international journals and

conferences (Scopus).

h-index=14 (Fig. 1).

Figure 1: Diagram of h-index.

TEACHING EXPERIENCE

1993-1997: Secondary School (courses: Geology, Geography, Chemistry, Environmental Education). 1997-2002: Department of Geology, University of Patras (teaching in undergraduate courses) 2003-2008: Lecturer of Hydrogeology at the Aristotle University, Geological Department (AUTh) Undergraduate Teaching: Exploitation and management of groundwater, Hydrogeology, Sanitary landfills, Topics in Geology, Drilling Techniques Postgraduate Teaching in 1 MSc program (Applied & Environmental Geology): Special issues in Hydrogeology, Water Resources Management, Environmental education 2008-2014: Assistant Professor of Hydrogeology at the Aristotle University, Geological Department (AUTh) 2014- today: Associate Professor of Hydrogeology at the Aristotle University, Geological Department (AUTh) Undergraduate Teaching: Hydrogeology, Exploitation and Μanagement of groundwater, Sanitary landfills, Geothermics, Drilling Techniques

Post-Graduate Teaching in two (2) MSc programs of AUTh:

Applied and Environmental Hydrogeology (Dept. of Geology): Special issues in Hydrogeology, Water Resources Management, Karst Hydrogeology, Groundwater Quality - Ecological quality and water management at a river basin scale (Dept. of Biology, Geology and Civil Engineering): Special issues in Hydrogeology, Water Resources Management, Aquifer Systems, Hydrological balance, Groundwater Balance, Vulnerability assessment to groundwater pollution. Thesis supervision (period 2003-today)

- Supervisor or co-supervisor of 104 undergraduate thesis on topics of Hydrogeology, water quality, groundwater management, Geothermics, Environmental Hydrogeology.

- Supervisor or co-supervisor or member of the Examination Committee of 34 MSc thesis

- Supervisor of 5 PhD theses (one PhD thesis was completed and supported in April 2013).

REVIEWS I have participated, since 2004 (lecturer), in reviewing papers in the following journals: International Journals

- Environment and Pollution (Canadian Center of Science and Education) (Editorial Board) - European Water Journal (European Water Resources Association, EWRA) (Editorial

Board) - Aquatic Science & Technology (Editorial Board) - Journal of Geography, Environment and Earth Science (Academic Editor) - Bulletin of Geological Society of Greece (Editorial scientific board) - Journal of Hydrology (Science Citation Index, SCI) - Science of the Total Environment (SCI) - Hydrogeology Journal (SCI) - Environmental Earth Sciences (SCI) - Journal of Environmental Management (SCI) - Hydrological Sciences Journal (SCI) - Water Resources Management (SCI) - Environmental Science and Pollution Research (SCI) - Journal of Environmental Monitoring & Assessment (SCI) - Desalination (SCI) - Fresenius Environmental Bulletin (Parlar Scientific Publications) (SCI) - Agricultural Water Management (SCI) - Universal Journal of Geoscience - Journal of Agricultural Science and Technology (Iran) - Natural Resources Forum- A United Nations Sustainable Development Journal - Desalination and Water Treatment - Bollettino di Geofisica Teorica ed Applicata (Italy) - Arabian Journal for Science and Engineering - British Journal of Environment and Climate Change - Water Science and Technology - International Journal of Water Resources and Environmental Engineering - Applied Water Science - Caspian Journal of Applied Sciences Research - Acque Sotterranee- Italian Journal of Groundwater

http://www.sciencedomain.org/journal-home.php?id=10

Environmental Processes - Management of Environmental Quality - Geotechnical and Geological Engineering

Greeks Journals - Mineral Wealth - Hydrotechnika, Journal of the Hellenic Hydrotechnical Association - Mining and Metallurgical Annals - Technical Annals - Geotechnical Scientific Issues ADMINISTRATIVE WORK Participation in commissions of the Aristotle University:

- Vice President of Centre of Integrated Water Management - Member of General Assembly of the Geological Department for 10 academic years - Member of Council of AUTh (one year) - Commission of undergraduate studies - Member of Environmental Council of AUTh (2008-2013) - Commission of Integrated Environmental Management of AUTh - Commission of statistical recording and educational work

MEMBERSHIP OF PROFESSIONAL BODIES - International Association of Hydrogeologists (IAH) - Hellenic Association of Hydrogeology (President, 2016-today) - European Water Resources Association (EWRA) - Hellenic Hydrotechnical Association - Geological Society of Greece - Geotechnical chamber of Greece - International Association of Mathematical Geosciences (IAMG)

Table 1: Brief CV (Voudouris, K.S., Aristotle University of Thessaloniki). Date and place of birth 1959, Korinthos Greece Education University of Patras, Greece

Diploma of Geology, Diploma of Mathematics PhD of Hydrogeology

Address Tel: (+30) 2310998041 Fax: (+30) 2310998530 E-mail : [email protected] http://auth.academia.edu/KostasVoudouris

Position Assistant Professor in Aristotle University, Thessaloniki, Greece Department of Geology Laboratory of Engineering Geology & Hydrogeology

Main field of activity Hydrogeology, Environmental Geology, Water Quality Groundwater Management, Groundwater Pollution

Practical experience 25 years of work on exploration, exploitation and protection of groundwater in the field of water supply, geo-environment, water quality, artificial recharge, groundwater vulnerability assessment, hydrological balance, etc. Participation and guidance of many projects in Greece. Cooperation with many European Universities and European institutes.

Scientific publications 1. Books: Environmental Hydrogeology (460 pages, in Greek) Engineering Hydrogeology (429 pages, in Greek) Exploitation and Management of Groundwater (654 pages, in Greek) Water Quality-Monitoring and Assessment (Editor) Ecological Water Quality (Editor) 2. Papers: 176 scientific papers published in scientific journals and proceedings of conferences.

Membership

of professional Bodies

- International Association of Hydrogeologists (IAH) - European Water Resources Association (EWRA) - International Association of Mathematical Geosciences (IAMG) - Hellenic Hydrotechnical Association - Geological Society of Greece - Geotechnical chamber of Greece

Teaching experience

Dept. of Geology, Aristotle University of Thessaloniki Undergraduate students: Hydrogeology, Groundwater Exploitation & Management, Geothermics, Environmental Hydrogeology, Drilling Techniques Postgraduate students: Water Pollution, Karst Hydrogeology, Mathematical models, Geostatistics

Other Skills Computer literacy (Microsoft Word, Excel, Grapher, Surfer) Statistical analysis (SPSS, STATISTICA). Simulation of groundwater flow: MODFLOW Pumping test- Hydrochemical analysis: AquiferTest - AquaChem

mailto:[email protected]

ANALYTICAL CURRICULUM VIATE

STUDIES

1. Undergraduate studies in the University of Patras

- In October of 1978, I began my studies in the Department of Geology at the University of Patras, after participating in the Greek National University Exams. I attended all courses and I took the Geology degree (very good) in October 1982. In the last semester I completed my thesis on Hydrogeology entitled: Hydrogeological conditions of the wider area of Patras Industrial zone Under the supervision of Professor G. Kallergis. - In October of 1986, I began my studies in the Department of Mathematics at the University of Patras. I attended all courses and I took the Mathematics degree (very good) in October 1994.

2. Doctoral Thesis

In October 1989, I began my postgraduate studies after distinction of Foundation of State Scholarships (IKY) in the Department of Geology at the University of Patras. My thesis topic was: Hydrogeological conditions of the NWestern part of Achaia In May 1994, I supported my doctoral degree and I was awarded with the title of Doctor of University of Patras. My research was supervised by Professor G. Kallergis The innovative parts of thesis are: - Geological regime - Hydrological balance - Aquifer systems-Hydraulic characteristics - Groundwater quality - Artificial Recharge - Isotopic analysis-Determination of groundwater age - Water management

SOFTWARE USE

- Very good knowledge of the software tools for hydrochemical analysis (AQUACHEM) and pumping test analysis (AQUIFER TEST). - Very good knowledge of the software tools for statistical analysis of hydrogeological data (SPSS, STATISTICA). - MODFLOW package for groundwater flow simulation Some of the aforementioned software is used in course tutorials.

CONFERENCES Period before the position of Lecturer 1993 2nd National Conference on Hydrogeology (Patras) Hellenic Association of Hydrogeology- Organizing Committee 1994 7th Conference of Geological Society of Greece (Thessaloniki) 1994 “Restoration and Protection of the Environment II” University of Patras & Stevens Ιnstitute of Technology (Patras) 1995 6th Conf. of Hellenic Hydrotechnical Association (Thessaloniki). 1995 3rd National Conference on Hydrogeology (Heraklion, Crete) Hellenic Association of Hydrogeology 1997 7th Conference of Hellenic Hydrotechnical Association (Patras) 1997 8th Conference of Geological Society of Greece (Patras) Organizing Committee

1999 4th Conf. of Greek Committee of Water Resources Management (Volos) 1998 4th National Conference on Hydrogeology (Nicosia, Cyprus)

1999 International Conference “Renewable energy sources and tourism” (Athens) 2000 8th Conference of Hellenic Hydrotechnical Association (Athens) 2002 International Association of Mathematical Geology, IAMG (Berlin) 2002 6th National Conference on Hydrogeology (Xanthi) Scientific Committee 2002 1st Workshop of Hellenic Committee of Hydrogology on Hard Rocks Hydrogeology. (11-13 June, Tinos Island). 2003 9th Conference of Hellenic Hydrotechnical Association (Thessaloniki).

Lecturer

2003 XXX IAHR Congress “Water Engineering and Research in a Learning Society” (24-29 August, Thessaloniki). 2004 8th International Conference of Geological Society of Greece (Thessaloniki). 2004 18th Salt Water Intrusion Meeting (Cartagena, Spain). 2005 5th Conf. of Greek Committee of Water Resources Management (Xanthi). 2005 5th International Symposium on Management of Aquifer Recharge (Berlin). 2005 7th International Conference on Hydrogeology (Athens).

2005 2nd Environmental Conference of Macedonia (Thessaloniki). 2006 “Agriculture and Water Recourses”. Hellenic Hydrotechnical Association (Thessaloniki). 2006 Wastewater Treatment Plant at small scale (Portaria, Pilion). 2006 Groundwater in Mediterranean countries. 24-28 April 2006, Instituto Geologico y Minero de España (Malaga, Spain). 2006 1º International Joint Salt Water Intrusion Conference SWIM-SWICA, (Chia, Cagliari, Italy). 2006 AQUA2006, 2nd International Conference of Water Science and Technology-

Integrated management of water resources (Athens). 2006 10th Conference of Hellenic Hydrotechnical Association (Xanthi). 2007 International Conference “Water Pollution in natural Porous media at different scales. Assessment of fate, impact and indicators”. (11-14 April, Barcelona, Spain). 2007 11th International Congress of the Geological Society of Greece. (Athens). 2007 International Scientific Conference “Modern Management of Mine Producing, Geology and Environmental Protection (SGEM 2007)”. (Varna, Bulgaria). 2007 Sustainable management of water resources by automated real-time monitoring. Workshop of the FP6 EU Project (Thessaloniki). Assistant Professor

2008 3rd Environmental Conference of Macedonia (Thessaloniki).

2008 Conference of Geological Society of Greece and Municipality of Korinthos «Earth and Sea of Korinthia: Geology-Seismology-Environment» (Korinthos) President of the Organizing committee 2008 8th International Conference on Hydrogeology (Athens). 2009 Common Conference of Hellenic Hydrotechnical Association and Greek Committee of Water Resources Management (Volos). Scientific Committee 2009 Water policy 2009: “Water as a vulnerable and exhaustible resource”. International Conference (Prague). 2009 Climatic Change-Sustainable development- renewable energy sourcses.

Environmental Council of AUTh (Thessaloniki) Organizing and Scientific Committee

2009 Geothermal Energy (Thessaloniki)

Organizing and Scientific Committee

2010 12th International Congress of the Geological Society of Greece (Patras). 2010 XIX International Congress of the Carpathian Balkan Geological Association

Organizing Committee

2011 4th Environmental Conference of Macedonia (Thessaloniki). 2011 9th International Conference on Hydrogeology (Kalavrita)

Scientific Committee 2012 UNESCO-IHP Expert meeting on “Assessment of risk and uncertainty related to coastal aquifers management in the Mediterranean” (Thessaloniki) 2012 Protection and Restoration of the Environment XI (July 2012, Thessaloniki).

Organizing Committee 2013 Meeting Ημερίδα «Water Technologies in ancient Greece». KEODY-AUTh (Thessaloniki). Organizing Committee 2013 13th International Congress of the Geological Society of Greece (Chania). Associate Professor 2014 10th International Conference on Hydrogeology (Thessaloniki). Hydrogeology and groundwater-depended ecosystems President of the Organizing Committee 2014 Regional Symposium on Water, Wastewater and Environment: Traditions and Culture. March 2014, Patras. Scientific Committee

2015 9th World Congress “Water Resources Management in a Changing World: Challenges and Opportunities”. European Water Resources Association. Istanbul, Turkey, 10-13 June, 2015. 2015 AQUA 2015, “Hydrogeology: Back to the future”. 42nd Congress, International Association of Hydrogeologists. Rome, Italy, September 13th-18th.

2015 2nd IWA International Workshop on Evolution of Qanats and Relevant Hydraulic Technologies, 8-10 November 2015, Yazd, Iran. Scientific Committee

2015 9th Conference of Hellenic Society of Agricultural Engineers, Thessaloniki, 8-9 October. 2015 3rd Common Conference of the Hellenic Hydrotechnical Association and Hellenic Committee for Water Resources Management, Athens, 10-12 December. Scientific Committee 2016 14th International Congress of the Geological Society of Greece. 25-27 May 2016, Thessaloniki 2016 Geothermics and its contribution to the development of Greece. 28 May 2016, Thessaloniki. President of the Organizing Committee

2016 43nd International Congress. International Association of Hydrogeologists. September 25th-28th, 2016. Montpelier, France. 2017 11th International Conference on Hydrogeology (Athens). Organizing Committee 2018 Eurokarst 2018, Besançon France, 2-6 July.

Visitor Professor in the frame of scientific exchange- sabbatical

- Lotz (Poland) (period 01/10/2009- 10/10/2009).

- Bratislava (Slovakia) (period 02/12/2009- 10/12/2009).

- Avignion (France), Université d'Avignon et des Pays de Vaucluse, Département d'Hydrogéologie (period 01/09/2016- 31/12/2016).

RESEARCH PROJECTS

a/a Research project title University Funding source Participation Topic Period

1

Water resources management of wider area of Patras

Patras Municipal Enterprise for water supply and drainage of Patras

Investigator Water resources

1991-1993

2 Impacts on aquifer system of Piros river basin from pumping via borehole

Patras Leader Industry Investigator Hydrogeology 1993

3 Hydrogeological Conditions of Industrial area of Patras

Patras Athenian Brewery Investigator Hydrogeology 1994-1995

4

Investigation to apply artificial recharge in the coastal aquifer system of Korinthia

National Technical University of Athens

Prefecture of Korinthia Investigator Hydrogeology 1997-1999

5 Hydrogeological investigation of the wider area of Moschochori, Fthiotida

Patras Athenian Brewery Investigator Hydrogeology 1998

6 Hydrogeological investigation of Malia area Patras Municipality of Malia 2000

7 Hydrogeological investigation of Chersonisos area

Patras Municipality of Chersonisos

Investigator Hydrogeology 2001-2002

8 Hydrological balance and water management of the karstic aquifer of Giouchta, Creta

Patras Municipality of Archanes Investigator Hydrogeology 2002

9 Investigation to address water problems in Soligia area

National Technical University

Municipalities of Soligia, Tenea, Saronikou

Investigator Water resources

2003-2004

10 Hydrological balance of the Aposelemis river basin

AUTh Municipality of Chersonisos

Scientific Supervisor

Hydrology 2005

11 Possibilities of artificial recharge application in Larisa prefecture

AUTh Municipal Enterprise for water supply and drainage of Larisa

Investigator Hydrogeology-Applied Geology

2005-2006

12 Investigation of the possibilities to construct a dam in Elasona area, Larisa

AUTh Municipal Enterprise for water supply and drainage of Larisa


13

Development and utilization of vulnerability maps for the monitoring and management of groundwater in the ARCHI-MED area (WATER-MAP). Case study: Western Macedonia

AUTh EU COMMUNITY INITIATIVE PROGRAMME, INTERREG III B ARCHIMED

Principal Researcher

Hydrogeology 2006-2008

14

Geophysical methods to study the groundwater flow during artificial recharge via borehole

AUTh Water supply and Sewage Company


15 Hygrogeological investigation of wider area of Peraia

AUTh Municipal Enterprise for water supply and drainage of Peraia



16 Hydrochemical and Hydrogeological investigation of Volos area

AUTh Municipal Enterprise for water supply and drainage of Volos

Investigator Water quality-Hydrogeology

2008-2013

17 Feasibility study for artificial recharge of the Kokkinochoria aquifer (Cyprus), using treated waste water

AUTh Cyprian Democracy, Water Development Department



18 Hydrotechnical investigation of geological suitability of the site of new cemetery in Korinthos

AUTh Municipality of Korinthos Scientific Supervisor


19 Investigating the causes of ruptures in Anargiri area, Florina

AUTh Municipality of Aetos Investigator Hydrogeology 2008-2009

20 Researching the suitability of the “Vartos” area as a place for the construction of a sanitary landfill

AUTh Association for Waste Products Management

Investigator Hydrogeology 2009

21 Simulation of groundwater flow in Kiti aquifer, Cyprus

AUTh Atlantis company, Cyprus Scientific Supervisor


22 Investigation on the rupture phenomena on the surface of Mavropigi area

AUTh Municipality of Eordaia Investigator Hydrogeology, Technical Geology

2010

23 Transnational integrated management of water resources in agriculture for European emergency control (EU WATER)

AUTh European Union Investigator Hydrogeology, Aquifer Vulnerability

2010-2012

24 Geological, Hydrogeological and Palaeontological investigation in Mesopotamia area, Kastoria

AUTh Municipality of Kastoria Investigator Hydrogeology 2009-2010

25

Suitability criteria in new cemetery planning, and their investigation at the new cemetery in Kokkari, Samos

AUTh Municipality of Samos Scientific Supervisor

Hydrogeology 2011

26 Water resources management in the wider area of municipality of Thermaikos

AUTh Municipal Enterprise for water supply and drainage of Thermaikos



27 COST Action ES1201: Networking Lake Observatories in Europe (NETLAKE)

AUTh European Union Investigator, Management Committee

Hydrology- Data analysis

2010-2012

28 Sensitivity assessment of TAP route to erosion phenomena and floods

AUTh EON New Build & Technology GmbH


Hydrogeology-Hydrology

2013

29 Control of influent and effluent groundwater volume in inactive landfill of Derveni

AUTh Local Authority of Thessaloniki

Investigator Hydrogeology-Hydrology

2014

30 Localization and identification of new therapeutic springs using hydrogeological and remote sensing techniques

AUTh Hellenic Association of Municipalities with Thermal Springs


Hydrogeology-Geothermics

2015-2016

31 Identification and distinction of aquifer systems using hydrogeological and hydrochemical data in mountainous Korinthia

AUTh NATURA Bottling Co Scientific Supervisor

Hydrogeology- Hydrochemistry

2015-2016

32 Investigation of the spring operation mechanism of Kivotos Grevena and determination of protection zones

AUTh Municipality of Grevena Investigator Environmental Hydrogeology

2015

33 Hydrogeological-Hydrochemical research and investigation of the conceptual model of the “Kokkino Nero” healing spring

AUTh Municipality of Agia Investigator Hydrogeology- Hydrochemistry

2015

34

Hydrological assessment for the watercources for the detail engineering services for section 2 and 3 Greece of the EPC Onshore Pipeline Construction of the Trans Adriatic Pipeline (TAP)

AUTh C&M Engineering A.E. Scientific Supervisor

Hydrology- Hydrogeology

2016-2017

35 Hydrogeological investigation and delineation of protection zones in the broader area of the Vikos Company boreholes

AUTh VIKOS Company Scientific Supervisor

Hydrogeology- Hydrochemistry

2016-2019

TEACHING EXPERIENCE

1993-1997: Secondary School (courses: Geology, Geography, Chemistry, Environmental Education). 1997-2002: Department of Geology, University of Patras (teaching in undergraduate courses) 2003-2008: Lecturer of Hydrogeology at the Aristotle University, Geological Department (AUTh) Undergraduate Teaching:

1) Exploitation and management of groundwater (GGG 763Y) 2) Hydrogeology (GGG 646Y) 3) Sanitary landfills (GGG 887E) 4) Topics in Geology (GGG 879E) 5) Drilling Techniques (GGG 875E)

Postgraduate Teaching in 1 MSc program (Applied & Environmental Geology):

1) Special issues in Hydrogeology (Water pollution) 2) Water Resources Management (Mathematical models) 3) Environmental education

2008-today: Assistant Professor of Hydrogeology at the Aristotle University, Geological Department (AUTh) Undergraduate Teaching:

1) Hydrogeology (GGG 646Y) Lectures: Surface Hydrology, Hydrological balance, Groundwater Hydrology, Properties of Aquifers, Groundwater flow, Piezometric maps, Karst Hydrogeology, Springs Tutorials (3 teaching groups): 9-10 series of tutorials are given. Number of students: 70-90 Field work: A field trip is executed

2) Exploitation and management of groundwater (GGG 763Y) Lectures: Pumping test analysis, Calculation of hydraulic parameters, Natural and Artificial recharge of aquifers, Coastal aquifer systems, Groundwater balance, Groundwater reserves, Economic data, Groundwater management, Groundwater resources in Greece Tutorials (3 teaching groups): 9-10 series of tutorials are given. Number of students: 45-55 Field work: A field trip is executed Course website: http://www.geo.auth.gr/courses/ggg/ggg763y/

3) Sanitary landfills (GGG 887E) Lectures: Water quality, Interaction between groundwater and environment, Pollution sources, Sanitary landfills (operation, selection site criteria), Aquifer vulnerability assessment, Protection zones, Disposal of liquid wastes. Number of students: 35-40 Field work: A field trip is executed Course website: http://www.geo.auth.gr/courses/ggg/ggg887e/

4) Geothermics (GGG 882E) Lectures: Internal earth heat, heat flow, Geothermal energy and potential, Geothermal fields, Geothermal energy of high-medium-low enthalpy, Methodology of geothermal exploitation,

http://www.geo.auth.gr/courses/ggg/ggg763y/

http://www.geo.auth.gr/courses/ggg/ggg887e/

Application of geothermal energy, Main geothermal fields in Greece Number of students: 60-70 Field work: A field trip is executed

5) Drilling Techniques (GGG 875E) The course is taught together with Lecturer V. Marinos Lectures: Types of boreholes, Shallow and deep exploration boreholes, Drilling technology and procedure, Borehole equipment, Completion, Well development, Logging Number of students: 50-60 Field work: A field trip is executed Course website: http://www.geo.auth.gr/courses/ggg/ggg875e/ Post-Graduate Teaching in two (2) MSc programs of AUTh: - Applied and Environmental Geology (Dept. of Geology)

1) Special issues in Hydrogeology (Water pollution) 2) Water Resources Management (Mathematical models)

- Ecological quality and water management at a river basin scale (Dept. of Biology, Geology and Civil Engineering):

1) Special issues in Hydrogeology (Water quality and pollution) 2) Water Resources Management (Mathematical models) 3) Aquifer Systems, Hydrological balance, Groundwater Balance, Vulnerability

assessment to groundwater pollution. Planning and carrying out of field trips in undergraduate and graduate courses

1) 4-day field trip in the frame of undergraduate courses “Hydrogeology- Exploitation & Management of groundwater” (until 2009): Topics: Karst aquifers, springs, dams, coastal aquifers.

2) 1-day field work of the undergraduate course “Hydrogeology”: topics: Field measurements (groundwater level, surface water flow, water quality).

3) 1-day field work of the undergraduate course “Exploitation and Management of groundwater” Topic: Pumping test

4) 1-day field work of the undergraduate course “Drilling Techniques” 5) 1-day field work of the undergraduate course “Sanitary landfills”. 6) 1-day field work of the undergraduate course “Geothermics”: topics: Thermal springs,

applications of geothermal energy). 7) 1-day field work of the graduate course “Special Issues in Hydrogeology”

SUPERVISION OF UNDERGRADUATE AND GRADUATE THESIS (period 2003-today)

- Supervisor or co-supervisor of 104 undergraduate thesis on topics of Hydrogeology, Water

quality, Groundwater management, Geothermics, Environmental Hydrogeology, Drilling

Techniques.

- Supervisor or co-supervisor or member of examination committee of 34 MSc Thesis

- Supervisor of 5 PhD Thesis (one PhD was completed and supported in April 2013).

- Member of examination committee of 20 PhD Thesis.

As a supervising professor, I am responsible for the assignment of the topic, the guidance but also

the development of initiative of the student themselves.

http://www.geo.auth.gr/courses/ggg/ggg875e/

PUBLICATIONS

Publication list The published articles of the candidate in chronological order are as follows (the PhD Thesis is referred as first): Period before the position of Lecturer 1) VOUDOURIS, K., (1995): Hydrogeological conditions in NWestern part of Achaia Prefecture. PhD Thesis. Dept. of Geology, University of Patras, p. 237. 2) VOUDOURIS, K., DANOPOULOS, Ch. (1993): Program for assessment of evapotranspiration and water excess based on Thornthwaite-Mather’s method (1955). Geotechnical Scientific Issues, Vol. 4, No 4, 78-84. 3) VOUDOURIS, K., KRESTENITIS, G., DIAMANTOPOULOU, P., DASKALAKI, P., (1993): Hydrogeological and Hydrochemical conditions of the Piros river basin, Achaia (NW Peloponnesus, Greece). Proc. of 2nd Hydrogeological Conference, Patras, Vol. Α′, 299-310. 4) VOUDOURIS, K., LAMBRAKIS, N., (1993): Statistical characteristics of precipitation in Western Greece. Proc. of 2nd Hydrogeological Conference, Patras, Vol. Α′, 33-41. 5) VOUDOURIS, K., LAMBRAKIS, N., TINIAKOS, L. (1994): Fluctuations of water balance in Achaia area (NW Peloponnesus, Greece) and impact on groundwater quality. Proc. of International Conference “Restoration and Protection of the Environment II”. August 1994, Patras, 140-147. 6) TINIAKOS, L., LAMBRAKIS, N., VOUDOURIS, K. (1994): Hydrogeology- Hydrochemistry of the Agia swamp (Patras area) and its relevance as a water resource. Proc. of International Conference “Restoration and Protection of the Environment II”. August 1994, Patras, 238-246. 7) VOUDOURIS, K., FLEET, M. (1995): Hydrochemical- isotopic analysis of groundwater in Patras industrial area. Proc. of 3rd Hydrogeological Conference, Heraklion, 345-355. 8) VOUDOURIS, K., LAMBRAKIS, ΚΑLLERGIS, G. (1995): Hydrogeological investigation and hydraulic parameters of Plio-Pleistocene sediments of wider area of Patras. Proc. of 3rd Hydrogeological Conference, Heraklion, 199-211. 9) FLEET, M., Κ. VOUDOURIS, K., (1995): Artificial recharge experiment via borehole in Plio-Pleistocene sediments of Patras Industrial zone. Proc. of 6th Panellenic Conference of the Hellenic Hydrotechnical Association, Thessaloniki, 74-83. 10) TINIAKOS, L., LAMBRAKIS, N., DASKALAKI, P., VOUDOURIS, K. (1996): Hydrogeological regime and environmental consideration of the coastal karstic spring Kryoneri (Messologi district, W. Greece). Proc. of International Conference “Restoration and Protection of the Environment III”, August 1996, Xania, 40-47. 11) DASKALAKI, P., VOUDOURIS, K., (1996): Hydrochemistry of the Evros river water: Factor analysis. Proc. 2nd Panellenic Conference. Geotechnical chamber of Greece, Larisa. Vol. Β′, 1293-1305. 12) LAMBRAKIS, N., VOUDOURIS, K., TINIAKOS, L., KALLERGIS, G. (1997): Impacts of simultaneous action of drought and overpumping on Quaternary aquifers of Glafkos basin (Patras region, western Greece). Environmental Geology, 29 (3/4), 209-216. 13) VOUDOURIS, K., LAMBRAKIS, N., PAPATHEODOROU, G., DASKALAKI, P. (1997): An application of Factor Analysis for the study of the Hydrogeological conditions in Plio-Pleistocene aquifers of NW Achaia (NW Peloponnesus, Greece). Mathematical Geology, Vol. 29, No 1, 43-59.

14) DASKALAKI, P., VOUDOURIS, K. (1997): Hydrochemistry of runoff waters in Epirus, NW Greece. R-mode factor analysis of data. Proc. Ιntern. Symposium on Engineering Geology and the Environment. Vol. 2, 1751-1756. 15) DIAMANTOPOULOU, P., VOUDOURIS, Κ., DASKALAKI, P., FLEET, M. (1997): Hydraulic parameters and water table fluctuation of the Patras industrial area aquifer. Proc. of 7th Panellenic Conference of Hellenic Hydrotechnical Association, Patras, 268-275. 16) VOUDOURIS, Κ., LAMBRAKIS, Ν., ΤINIAKOS, L., ΚALLERGIS, G. (1997): Contribution to the study of the water balance in the Patras area. Proc. of 7th Panellenic Conference of Hellenic Hydrotechnical Association, Patras, 49-58. 17) VOUDOURIS, Κ., PAPADOPOULOS, Κ., BOULOUKAKIS, Η., ΚIROUSIS, J. (1997): Distribution of rainfall and hydrological balance in Heraklion prefecture, Crete island. Proc. of 3rd Panellenic Conference "Water resources management in island and coastal areas". Hellenic Committee of water resources management, Siros, 5-11. 18) BOULOUKAKIS, Η., VOUDOURIS, Κ. (1997): Evaluation of pumping tests in platy limestone (Plattenkalk) of Heraklion prefecture, Crete island. Proc. of 4th Hydrogeological Conference, Thessaloniki, 324-336. 19) VOUDOURIS, Κ., PAPADOPOULOS, Κ. (1998): Quantitative analysis of heavy rainfall (January, 12; 1997) in Corinth region (Greece). Proc. of 8th International Conference of Geological Society of Greece, Patras. Vol. XXXII, No 4, 33-41. 20) DASKALAKI, P., VOUDOURIS, K., DIAMANTOPOULOU, P. (1998): Hydrochemical study of North Peloponnesus Quaternary and Plio-Pleistocene aquifers. Proc. of International Conference «Restoration and Protection of the Environment IV», July 1998, Sani, Halkidiki. Vol. I, 109-116. 21) VOUDOURIS, Κ., FRAGOS, S. (1999): Application of integrated parametric model for water resources management in NW Achaia. Proc. of 4th National Conference "Water resources management in vulnerable areas of Greece". Hellenic Committee for water resources management, Volos, issue Β, 3-10. 22) VOUDOURIS, K., (1999): Rainfall spatial distribution in North Peloponnesus. Proc. of 5th Hydrogeological Conference, Nicosia, Cyprus, 245-254. 23) ΜANDILARAS, D., VOUDOURIS, K., LAMBRAKIS, Ν. (1999): Quality and groundwater level fluctuation in alluvial aquifer of Glafkos river basin (NW Achaia). Proc. of 5th Hydrogeological Conference, Nicosia, Cyprus, 407-422. 24) KOUMANTAKIS, J. PANAGOPOULOS, A., STAVROPOULOS, X., VOUDOURIS, K., (1999): Application of artificial recharge in coastal aquifer system of the northern part of Korinthia. Proc. of 5th Hydrogeological Conference, Nicosia, Cyprus, 65-80. 25) VOUDOURIS, K., PANAGOPOULOS, A., KOUMANTAKIS, J. (2000): Multivariate Statistical analysis in the assessment of Hydrochemistry of the Northern Korinthia Prefecture alluvial aquifer system (Peloponnesus, Greece). Natural Resources Research, Vol. 9, No 2, 135-146. 26) LAMBRAKIS, N., TINIAKOS, L., VOUDOURIS, K., KALLERGIS, G. (2000): Hydrogeologische Untersuchungen auf der insel Serifos zur Beschaffenheit der granodioritischen Wässer. Beiträge zur Hydrogeologie 51, Graz, 95-110. 27) STAMATIS, G., VOUDOURIS, K., (2000): Delineation of protection zones according to hydrogeological criteria: the case study of Loutraki alluvial aquifer. Mineral Wealth 116, 13-36. 28) VOUDOURIS, K., PANAGOPOULOS, A., DANIIL, D. (2000): Implications to surface water quality of Corinth’s Prefecture from anthropogenic activities. Proc. of International Conference «Restoration and Protection of the Environment V». Thasos. Vol. I, 235-242. 29) VOUDOURIS, K., BOHLMEIJER, H.R. (2000): Hydraulic parameters and hydrochemical characteristics of the aquifer from one part of Sperchios basin. Proc. of 8th Panellenic Conference of Hellenic Hydrotechnical Association, Athens, 351-358. 30) STAMATIS, G., VOUDOURIS, K., ΚAREFILAKIS, Th. (2001): Groundwater pollution by heavy metals in historical and mineral area of Lavrio (Attica, Greece).

Water, Air and Soil Pollution 128, 61-83. 31) ΖELILIDIS, Α., ΑVRAMIDIS, P., VOUDOURIS, K., & POULIMENOS, G. (2001): The influence of the Pliocene and Pleistocene depositional environments evolution on the hydrogeological conditions of the Selinous river in Egio area, N. Peloponnesus. Mineral Wealth 118, 21-32. 32) ΖELILIDIS, Α., ΑVRAMIDIS, P., VOUDOURIS, K., (2001): Hydrogeological conditions in relation to the Pindos foreland evolution, Tritea area, NW Peloponnesus. Mining and Metallurgical Annals, Vol. 11, No 1-2, 35-52. 33) HIONIDI, M., PANAGOPOULOS, A., KOUMANTAKIS, J., VOUDOURIS, K. (2001): Groundwater quality considerations related to artificial recharge to the aquifer of the Korinthos Prefecture, Greece. Proc. of 3rd International Conference on Groundwater Quality: Natural and enhanced restoration of groundwater pollution. Sheffield, U.K. IAHS publ. No 275, 85-90. 34) PANAGOPOULOS, A., VOUDOURIS, K., KOUMANTAKIS, J., HIONIDI, M. (2001): Groundwater evolution of the Northern Korinthia region coastal aquifer system, as indicated by Hydrochemistry. Proc. of 9th International Conference of Geological Society of Greece, Athens. Vol. XXXIV/5, 1991-1997. 35) ΜANDILARAS, D., VOUDOURIS, K., (2001): The groundwater balance and water quality of the alluvial aquifer of Glafkos Basin, Achaia, Greece. Proc. of 9th International Conference of Geological Society of Greece, Athens. Vol. XXXIV/5, 1827-1834. 36) VOUDOURIS, K. (2002): Time series analysis using ARIMA models of the groundwater table in Patras industrial area aquifer system (NW Peloponnese, Greece). Proc. 8th Annual Conference of the International Association for Mathematical Geology, Berlin, Germany. Vol. 1, 335-340. 37) PANAGOPOULOS, A., VOUDOURIS, K., HIONIDI, M., KOUMANTAKIS, J. (2002): Irrational water resources management impacts on the coastal aquifer system of Korinthia. Proc. of International Conference «Restoration and Protection of the Environment V», July 2002, Skiathos. Vol. I, 419-426. 38) VOUDOURIS, K., HIONIDI, M., PANAGOPOULOS, A., KOUMANTAKIS, J. (2002): Extreme climatic events in the Prefecture of Korinthos (Greece) and their impact on groundwater resources. Proc. 5th International Conference “Water resources management in the era of transition”. European Water Resources Association. Athens, 107-114. 39) VOUDOURIS, K., PANAGOPOULOS, A., ΜΑRKANTONIS, Κ. (2002): Hydrological balance and possibilities of sustainable water resources management in Stimfalia Basin (Prefecture of Corinthos). Proc. of 6th Panellenic Geographical Conference, Thessaloniki, 3-6 October 2002, Vol. II, 327-334. 40) VOUDOURIS, K., ΚALLERGIS, G. (2002): Changes of the rainfall regime in S. Greece and water resources management. Proc. of 6th Hydrogeological Conference, Xanthi, 8-10 November 2002, 107-118. 41) VOUDOURIS, Κ., GIANNATOS, G., DIAMANTOPOULOU, P., ΖANNIS, P., PAPAKONSTANTINOU, Κ. (2002): Results of groundwater recharge on the confined aquifer in Patras industrial area (Greece). Proc. of 6th Hydrogeological Conference, Xanthi, 8-10 November 2002, 47-58 (Preliminary results of paper Νο 62). 42) VOUDOURIS, Κ., STAMATIS, G. (2002): Distribution and Fractal analysis of parameters of the upper part of unsaturated zone of the alluvial aquifer of Loutraki basin. Mining and Metallurgical Annals, Vol. 12, No 1-2, 39-54. 43) STAMATIS, G., VOUDOURIS, K. (2003): Marine and human activity influences on the groundwater quality of southern Korinthos area (Greece). Hydrological processes, 17, 2327-2345. 44) VOUDOURIS, K. (2003): Methodologies to predict the groundwater levels. Proc. of 9th Panellenic Conference of Hellenic Hydrotechnical Association, Thessaloniki, 321-328. 45) ΤΙNIAKOS, L., VOUDOURIS, K., LAMBRAKIS, N. (2003): Preliminary results on the hydrogeological behaviour of the metamorphic and semi-metamorphic rocks in Greek islands.

Proc. 1st workshop on Fissured rocks hydrogeology, Tinos, 83-92 (Ed. G. Stournaras). 46) VOUDOURIS, K. (2003): Contribution to the hydrogeology and sustainable management in Giouchta aquifer system, Prefecture of Heraklion). Geotechnical Scientific Issues, Vol. 14, Νο 4, 36-48. 47) VOUDOURIS, K., PANAGOPOULOS, A., KOUMANTAKIS, J. (2004): Nitrate pollution in the coastal aquifer system of the Korinthos Prefecture (Greece). Global Nest: The International Journal, Vol. 6, No 1, 31-38.

Period after the position of Lecturer 48) VOUDOURIS, K., ΝΙΚΑS, Κ., ΑNTONAKOS, Κ. (2004): Study of evolution of the seawater intrusion in coastal aquifers. Case study: The coastal aquifer system of NW Achaia. Proc. of 10th International Conference of Geological Society of Greece, Thessaloniki, Vol. XXXVI/4, 1952-1961. 49) VOUDOURIS, K., MANDILARAS, D., ANTONAKOS, A. (2004): Methods to define the areal distribution of the salt intrusion: Examples from South Greece. Groundwater and saline intrusion. Selected papers from the 18th Salt Water Intrusion Meeting. Cartagena, Spain. Publ. Geological Survey of Spain (ed. L. Araguas, E. Custodio, M. Manzano), 465-480. 50) VOUDOURIS, K., MANDILARAS, D., (2004): Evaluation of groundwater vulnerability using the Drastic Method: case study of alluvial aquifer of Glafkos Basin, Achaia. Hydrotechnica, Journal of the Hellenic Hydrotechnical Association, Vol. 14, December 2004, 17-30. 51) VOUDOURIS, K., ANTONAKOS, A., ΚOUMANTAKIS, J. (2005): Contribution to the assessment of water resources in Asopos river basin (Korinthia Prefecture). Proc. of 5th Conference of the Hellenic Committee of water resources management, Xanthi, 119-127. 52) GIANNELI, Ch., SOULIOS, G., VOUDOURIS, Κ., DIAMANTIS, J., ΚILIAS, Α., ΖAGANA, Ε. (2005): Hydrochemical characteristics of groundwater in the alluvial aquifer of Korisos Basin, prefecture of Kastoria. Proc. of 7th Hydrogeological Conference, Athens, 71-82. 53) ΜΑRKANTONIS, Κ., VOUDOURIS, K., ΚOUMANTAKIS, J. (2005): Groundwater resourses in South-East Korinthia. Proc. of 7th Hydrogeological Conference, Athens, 281-288 (poster presentation). 54) MATTAS, C., SOULIOS, G., DIMOPOULOS, G., DIAMANTIS, J., PANAGOPOULOS, Α., VOUDOURIS, K., (2005): Groundwater quality in Gallikos Basin, prefecture of Kilkis. Proc. of 7th Hydrogeological Conference, Athens, 311-320. 55) VOUDOURIS, K., (2005): The impacts of agricultural and tourism development on groundwater sustainability: Two examples from South Greece. Geographies, No 10, 130-146. 56) STAVROPOULOS, X., VOUDOURIS, K. (2005): Groundwater recharge: Results from deep injection tests in Achaia aquifer systems, SW Greece. Proceedings of 5th International Symposium on Management of Aquifer Recharge. Berlin, Germany. UNESCO, IHP-VI, Series on Groundwater, No 13, 755-760. 57) VOUDOURIS, K., SOULIOS, G., RAPTI, D., MIRIOUNIS, C. (2005): Spatial distribution of hydraulic conductivity and anisotropy of Skydras aquifer system, North Greece. “GIS and Spatial Analysis” Proc. of Αnnual Conference of the International Association for Mathematical Geology, Toronto, Vol. 1, 387-392. 58) VOUDOURIS, K., DASKALAKI, P., ANTONAKOS, A. (2005): Water resources and groundwater quality in North Peloponnesus, Greece. Global Nest: The International Journal, Vol. 7, No 3, 340-353. 59) VOUDOURIS, K., SOTIRIADIS, M., PAVLOU, A. and HATZILIONTOS, C. (2006): Groundwater quality in the coastal aquifer system of eastern Thermaikos Gulf, North Greece. Journal of Environmental Protection and Ecology. Vol. 7, No 2, 269-279. 60) VOUDOURIS, Κ. (2006): Polluting susceptibility of geological formations and soil disposal of waste: The case of oil mill waste of Korinthia Prefecture. Proc. of Conference «Wastewater

Treatment Plant at small scale». Portaria, Pilio, 8-9 April 2006, 279-286 (Eds Α. Ζouboulis, Α. Κougolos, P. Samaras, Χ. Prochaska). 61) VOUDOURIS, K., MAVROMMATIS, Th., DASKASLAKI, P., SOULIOS, G. (2006): Rainfall variations in Crete island (Greece) and their impacts on water resources. Publicaciones del Instituto Geologico y Minero de España. Serie: Hidrogeologia y aguas subterráneas No 18, Karst, climate change and groundwater, Madrid, 453-463. 62) VOUDOURIS, K., DIAMANTOPOULOU, P., GIANNATOS, G., ZANNIS, P. (2006): Groundwater recharge via deep boreholes in Patras Industrial Area aquifer system (NW Peloponnesus, Greece). Bulletin of Engineering Geology and the Environment. Vol. 65, Number 3, 297-308. 63) PAPATHANASSIOU, G., VOUDOURIS, K., CHRISTARAS, B., PAVLIDES, S. (2006): Prediction methods of earthquake-induced liquefaction surface manifestations. E-Proc. XIth

International Congress for Mathematical Geology “Quantitative Geology from multiple sources”. International Association Mathematical Geology, Liege, Belgium, September 3-8, SO9-21. 64) VOUDOURIS, K. (2006): Groundwater balance and safe yield of the coastal aquifer system in northeastern Korinthia, Greece. Applied Geography, Vol. 26, 291-311. 65) ΜΑΝΑΚΟS, Α., VOUDOURIS, Κ. (2006): Study of Hydrogeological conditions in alluvial Basin of Elassona-Tsaritsani, Larisa prefecture. Proc. of 10th Panellenic Conference of the Hellenic Hydrotechnical Association, Xanthi, Vol. Α′, 445-452. 66) SPACHOS, Th., VOUDOURIS, K., DROSOS, D., DIMOPOULOS, G. (2006): Groundwater levels fluctuation in aquifer systems of Borehole fields of water sewerage company of Thessaloniki. Proc. of 10th Panellenic Conference of the Hellenic Hydrotechnical Association, Xanthi, Vol. Α′, 483-490. 67) VOUDOURIS, K., BALTAS, E., VASALAKIS, A., DIAMANTOPOULOU, P. (2006): Pressures on water resources and their impacts on coastal aquifers: case studies from Greek islands. WSEAS (World Scientific and Engineering Academy and Society). Transactions on Environment and Development. Issue II, Vol. 2, 1427-1434. 68) GIANNELI, C., VOUDOURIS, K., STAMOU, A., SOULIOS, G. (2007): Proposed method to assess the intrinsic groundwater vulnerability of shallow aquifers: An example from Amyntaion basin, N. Greece. Proc. of International Conference “Water Pollution in natural Porous media at different scales. Assessment of fate, impact and indicators”. 11-14 April, Barcelona, Spain. Publicaciones del Instituto Geologico y Minero de España. Serie: Hidrogeologia y aguas subterráneas No 22, 129-135. 69) SOULIOS, G., VOUDOURIS, K., KALFOUNTZOS, D., KAKLIS, T., SOTIRIADIS, M., ALEXIOU, J., KOTSOPOULOS, S. (2007): Preliminary results of groundwater recharge experiments in Larisa Prefecture. Proceedings of the 11th International Congress, Athens, May, 2007. Bulletin of the Geological Society of Greece, Vol. XXXVII, Part 2, 560-569. 70) TSOURLOS, P., VARGEMEZIS, G., VOUDOURIS, K., SPACHOS, T., STAMPOLIDIS, A. (2007): Monitoring recycled water injection into a confined aquifer in Sindos (Thessaloniki) using electrical resistivity tomography (ERT): Installation and preliminary results. Proceedings of the 11th International Congress, Athens, May, 2007. Bulletin of the Geological Society of Greece, Vol. XXXVII, Part 2, 580-592. 71) VOUDOURIS, K., ALEXOPOULOS, A., ANTONAKOS, A., KALLERGIS, G. (2007): Water resources in the wider area of the Aposelemis basin, Crete island, Greece. Proceedings of the 11th International Congress, Athens, May, 2007. Bulletin of the Geological Society of Greece, Vol. XXXVII, Part 2, 616-628 (poster presentation). 72) DIAMANTOPOULOU, P., VOUDOURIS, K. (2008): Optimization of water resources management using SWOT analysis: The case of Zakynthos island, Ionian Sea, Greece. Environmental Geology 54, 197-211. 73) DASKALAKI, P., VOUDOURIS, K. (2008): Groundwater quality of porous aquifers in Greece: a synoptic review. Environmental Geology 54 (3), 505-513.

74) VASALAKIS, A., VOUDOURIS, K., FYTIKAS, M., DIMOPOULOS, G. (2005): Groundwater quality in Naxos island, Cyclades, Greece. e-Proc. of 9th International Conference on Environmental Science and Technology. Rhodes, Greece, 1-3 September, Vol. B, 981-987 (poster presentation). 75) MANDILARAS, D., VOUDOURIS, K., SOULIOS, G. (2006): Hydraulic parameters in the karstic aquifer systems of Greece. e-Proceedings of International Conference “All about Karst & Water”. Vienna, 118-129. 76) MYRIOUNIS, C., VOUDOURIS, K., TSOURLOS, P., SOULIOS, G., DIMOPOULOS, G. (2006): Hydrochemical and Geophysical Survey of the Almyros Aquifer System, East Central Greece. Proceedings of 1st International Joint Salt Water Intrusion Conference (SWIM-SWICA) (Ed. Barrocou, G.), September 24-29, Cagliari, Italy, 221-227. 77) VOUDOURIS, K. (2007): An application of SWOT analysis and GIS for the optimization of water resources management in Korinthia prefecture, Greece. Proc. of International Conference “Water resources management: New approaches and technologies. European Water Resources Association (EWRA). Chania, Crete, 14-16 June 2007, 307-315 (Eds Karatzas G., Papadopoulou M., Tsagarakis K.). 78) GIANNELI, Ch., STAMOS, Al., STAMOS, Ap., VOUDOURIS, K. (2007): Surface and groundwater quality in Florina prefecture. Proc. 1st Conf. on Environmental Management, Engineering, Planning and Economics (CEMEPE). Skiathos, June 24-28, 765-770.

Period after the position of Assistant Professor

79) MATTAS, C., SOULIOS, G., PANAGOPOULOS, A., VOUDOURIS, K., PANORAS, A. (2007): Hydrochemical characteristics of the Gallikos river water, Prefecture of Kilkis, Greece. Global Nest: The International Journal, Vol. 9, No 3, 251-258. 80) TIZRO, T.A., VOUDOURIS, K., EINI, M. (2007): Groundwater balance, safe yield and recharge feasibility in a semi-arid environment: A case study from western part of Iran. Journal of Applied Sciences. ISSN 1812-5654, 1-10. 81) VOUDOURIS, K., MAVROMMATIS, T., ANTONAKOS, A. (2007): Hydrologic balance estimation using GIS in Korinthia prefecture, Greece. Advances in Science and Research 1, 1-8. 82) MAVROMMATHS, Th., VOUDOURIS, K. (2007): Relationship between the hydrological parameters using correlation analysis and trend analysis in Crete island, Greece. Journal of Environmental Hydrology, Vol. 15, Paper 29, 1-13. 83) TIZRO, T.A., VOUDOURIS, K. (2008): Groundwater quality in the semi-arid region of the Chahardouly basin, West Iran. Hydrological Processes, Vol. 22, Issue 16, 3066-3078. 84) ΚAZAKIS, Ν., ΜAVROMMATIS, Th., VOUDOURIS, K. (2008): Changes in extreme hydrological event frequencies in Greece. Proc. of 9th Conference of Meteorology, Climatology and Atmospheric Physics, Thessaloniki, 887-894. 85) ANTONAKOS, A., LAMBRAKIS, Ν., VOUDOURIS, K. (2008). The use of multicriteria analysis and GIS for the selection of suitable sites for the location of new production boreholes in Korinthia prefecture area. Proc. of Conference «Earth and Sea of Korinthia: Geology, Seismology and Environment», Korinthos, 2-3 May 2008, Bulletin of the Geological Society of Greece, Vol. XXXXI/I, 121-133. 86) ANTONAKOS, A., LAMBRAKIS, Ν., VOUDOURIS, K. (2008): The use of GIS and the software package SWAT for the evaluation of watershed simulation models in Korinthia prefecture. Proc. of 8th Hydrogeological Conference, Athens, Vol. 2, 431-442 (Εds: Migiros, G., Stamatis, G., Stournaras, G.). 87) MOUSSA, A., KANTIRANIS, N., VOUDOURIS, K., STRATIS, J., ALI, M., CHRISTARAS, B. (2009): The impact of soluble salts on the deterioration of Pharaonic and Coptic wall paintings at al Al-Qurna, Egypt: Mineralogy and Chemistry. Archaeometry 51/2, 292-308.

88) VOUDOURIS, K. (2009): Assessing groundwater pollution risk in Sarigkiol basin, NW Greece. In: River Pollution Research Progress, Chapter 7, 265-281. Nova Science Publishers Inc. (Eds: M. Gallo and M. Herrari). ISBN 978-1-60456-643-7. 89) MOUSSA, A., KANTIRANIS, N., VOUDOURIS, K., STRATIS, J., ALI, M., CHRISTARAS, B. (2009): Diagnosis of weathered Coptic wall paintings in the Wadi El Natrun region, Egypt. Journal of Cultural Heritage Vol. 10, No 1, 152-157. 90) ΚAZAKIS, Ν., VOUDOURIS, Κ., PAVLOU, Α. (2009): Assessing aquifer vulnerability to seawater intrusion in the Eastern part of Thermaikos Gulf, North Greece. Proc. of 11th Conference of the Hellenic Hydrotechnical Association, Volos, 27-30 May, Vol. Ι, 511-518. 91) MANOS, B., BOURNARIS, Th., PAPATHANASIOU, J., VOUDOURIS, K. (2009): A DSS for sustainable development and environmental protection of agricultural regions. Environmental Monitoring & Assessment, Vol. 164, Issue 1, 43-52. 92) GEORGIOU, P., VOUDOURIS, Κ. (2009): Availability of water resources and virtual water estimation in Korinthia prefecture. Proc. of 6th Conference of Society of Agricultural Engineers, Thessaloniki, 8-10 October 2009, 391-398. 93) ΤΙΖΡΟ, T.Α., VOUDOURIS, Κ.S., SALEHZADE, M., MASHAYEKHI, H. (2010): Hydrogeological framework and estimation of aquifer hydraulic parameters using geoelectrical data: A case study from West Iran. Hydrogeology Journal, Vol. 18, 917-929. 94) CHRISTOFORIDOU, P., PANAGOPOULOS, A., VOUDOURIS, K. (2010): Towards a new procedure to set up groundwater threshold values in accordance with the previsions of the EC Directive 2006/118: A case study from Achaia and Korinthia (Greece). Proceedings of the 12th International Congress, Patras, May, 2010. Bulletin of the Geological Society of Greece, Vol. XLIII, No 4, 1678-1687. 95) VOUDOURIS K., KAKLIS T., CONSTANTINOU K., EVAGGELATOS F., PAPAGEORGIOU S., MENTES A., IRAKLEOUS Th., PANAGIOTOU Ch. (2010): Pilot study for artificial recharge of the South-Eastern Mesaoria aquifer (Cyprus), using treated wastewater. Proc. of XIX Congress of Carpathian Balkan Geological Association. September 23-26, 2010, Thessaloniki. Special Vol. 99, 173-181 (Eds Christofides, G., Kantiranis, N., Kostopoulos, D., Chatzipetros, A.). 96) MANOS, B., PAPATHANASIOU, J., BOURNARIS, TH., VOUDOURIS, K. (2010): A multicriteria model for planning agricultural regions within a context of groundwater rational management. Journal of Environmental Management 91, 1593-1600. 97) VOUDOURIS, K., KAZAKIS, N., POLEMIO, M., KAREKLAS, K. (2010): Assessment of intrinsic vulnerability using DRASTIC model and GIS in the Kiti aquifer, Cyprus. European Water 30, 13-24. 98) VOUDOURIS, K., POLEMIO, M., KAZAKIS, N., SIFALERAS, A. (2010): An agricultural decision support system for optimal land use regarding groundwater vulnerability. International Journal of Information Systems and Social Change 1(4), 66-79. 99) VOUDOURIS, K., GEORGIOU, P., STIAKAKIS, E., MONOPOLIS, D. (2010): Comparative analysis of stochastic models for simulation of discharge and chloride concentration in Almyros karstic spring in Greece. Proc. 12th Annual Conference of the International Association for Mathematical Geosciences (IAMG), 29 August-2 September, 2010, Budapest, 1-15. 100) VOUDOURIS, Κ., ΚAZAKIS, Ν. (2011): The impacts of urbanization on groundwater of Peraia Area, Thermaikos. Proc. of 4th Environmental Conference of Macedonia. Thessaloniki. 101) TSIOUMAS, V., ZORAPAS, V., PAVLIDOU, E., LAPPAS, I., VOUDOURIS, K. (2011): Groundwater contamination by nitrates and seawater intrusion in Atalanti basin (Fthiotida, Greece). Advances in the research of aquatic environment, (Eds: Lambrakis, N., Stournaras, G., Katsanou, K.), Springer. Proc. of 9th International Conference on Hydrogeology, Kalavrita, October 5-8, 2011. Vol. 2, 317-325.

102) KAZAKIS, N., VOUDOURIS, K. (2011): Comparison of three applied methods of groundwater vulnerability mapping: A case study from the Florina basin, Northern Greece. Advances in the research of aquatic environment, (Eds: Lambrakis, N., Stournaras, G., Katsanou, K.), Springer. Proc. of 9th International Conference on Hydrogeology, Kalavrita, October 5-8, 2011. Vol. 2, 359-367. 103) SOULIOS, G., TSAPANOS, Th., VOUDOURIS, K., KAKLIS, T., MATTAS, Ch., SOTIRIADIS, M. (2011): Ruptures on surface and buildings due to land subsidence in Anargyroi village (Florina Prefecture, Macedonia). Advances in the research of aquatic environment, (Eds: Lambrakis, N., Stournaras, G., Katsanou, K.), Springer. Proc. of 9th International Conference on Hydrogeology, Kalavrita, October 5-8, 2011. Vol. 2, 505-512. 104) TIZRO, T.A., VOUDOURIS, K.S., AKBARI, K (2011): Simulation of a groundwater artificial recharge in a semi-arid region of Iran. Irrigation and Drainage 60, 393-403. 105) JACOB, J., TOUGIANNIDIS, N., GURK, M., KASPER, H.U., WEBER, M.E., KAZAKIS, N., VOUDOURIS, K. (2011): Contribution to hydrogeochemical and geophysical investigation of Skopia karst-area (Makedonia, NW Greece). Proc. of 9th Conference on limestone Hydrogeology. 1-3 Sept. 2011, Besançon, France, 233-236. 106) GIANNELI, Ch., VOUDOURIS, K., SOULIOS, G. (2011): Water resources in Korisos basin, NW Greece: Interactions between surface and groundwater. International Journal of Water, Vol. 6, Nos 1/2, 57-73. 107) VOUDOURIS, K. (2011): Artificial recharge via boreholes using treated wastewater: Possibilities and Prospects. Water 3(4), 965-975 (Special Issue: Water Recycling and Reuse). 108) VOUDOURIS, K., MAVROMMATIS, TH., KRINIS, P. (2012): Assessing runoff in future climate conditions in Messara valley in Crete with a rainfall-runoff model. Meteorological Applications 19, 473-483. 109) PATRIKAKI, Ο., KAZAKIS, N., VOUDOURIS, K. (2012): Vulnerability map: a useful tool for groundwater protection. An example from Mouriki basin, North Greece. Fresenius Environmental Bulletin (Parlar Scientific Publications), Vol. 21, No 8c, 2516-2521. 110) ASCHONITIS, V.G., MASTROCICCO, M., COLOMBANI, N., SALEMI, E., KAZAKIS, N., VOUDOURIS, K., CASTALDELLI, G. (2012): Assessment of the intrinsic vulnerability of agricultural land to water and nitrogen losses via deterministic approach and regression analysis. Water, Air, Soil Pollution 223(4), 1605-1614. 111) VOUDOURIS, K. (2012): Diachronic evolution of water supply in eastern Mediterranean. In “Evolution of water supply through the Millennia” (Eds Angelakis, A.N., Mays, L.W., Koutsoyiannis, D., Mamassis, N.). Chapter 4, 77-89. 112) PAPACHARALAMPOU, Ch., MELFOS, V., VOUDOURIS, K. (2012): Water supply and related constructions since antiquity in Retziki (Pefka) of Thessaloniki, Northern Greece. Proc. of 3rd Specialized Conference on Water and Wastewater Technologies in ancient civilizations. 22-24 March, Istanbul, Turkey, 154-161. 113) VAVELIDIS, M., GIOURI, A., VOUDOURIS, K., VAXEVANOPOULOS, M. (2012): Regional Geology and its impact on water supply in the Pangeon and Menikion mountains (N. Greece). Landscape and sustainable development: Water-contributions to sustainable supply and use. University of Salzburg (Eds Weingartner, H., Blumenstein, O., Vavelidis, M.). Vol. 4, 15-29. 114) NTISLIDOU, Ch., BASDEKI, A., PAPACHARALAMPOU, Ch., ALBANAKIS, K., LAZARIDOU, M., VOUDOURIS, K. (2012): Ecological water quality and management at a river basin level: A case study from Kosynthos river basin in June 2011. In “Ecological water quality-Water Treatment and Reuse” (Eds Voudouris, K., Voutsa, D.). Chapter 2, 23-44. 115) KESSOGLOU, O., VARGEMEZIS, G., VOUDOURIS, K. (2012): Application of geophysical methods to detection of saline aquifers at the area of Aggelochori, Thessaloniki, Greece. Proc. of International Conference “Protection and Restoration of the Environment XI”, Thessaloniki, July 2012, 298-307. 116) SPACHOS, T., VOUDOURIS, K., ARGYROPOULOS, G. (2012): Preliminary results of

artificial recharge via borehole using treated wastewater in Sindos, Greece. Proc. of International Conference “Protection and Restoration of the Environment XI”, Thessaloniki, July 2012, 326-335. 117) TIZRO, T.A., VOUDOURIS, K., ΒASAMI, Y. (2012): Estimation of porosity and specific yield by application of geoelectrical method: A case study in western Iran. Journal of Hydrology 454-455, 160-172. 118) GUDULAS, K., VOUDOURIS, K., SOULIOS, G., DIMOPOULOS, G. (2013): Comparison of different methods to estimate actual evapotranspiration and hydrologic balance. Desalination and Water Treatment 51, 2945-2954. 119) VOUDOURIS, K., GEORGIOU, P., MAVROMATIS, Τh., GIANNELI, Ch. (2013): Comparison of actual evapotranspiration estimation methods: Application to Korisos basin, NW Greece. In “Evapotranspiration: Processes, Sources and Environmental Implications” (Ed. Er-Raki, S.), Chapter 6, 105-118. 120) KAZAKIS, Ν., VOUDOURIS, Κ., VARGEMEZIS, G., PAVLOU, A. (2013): Hydrogeological regime and groundwater occurrence in the Anthemountas river basin, Northern Greece. Proceedings of the 13th International Congress, Chania, Sept. 2013. Bulletin of the Geological Society of Greece, Vol. XLVII, No 2, 711-720. 121) SOULIOS, G., MATTAS, C., KAKLIS, T., SOTIRIADIS, M., VOUDOURIS, K., DIMOPOULOS, G. (2013): Is the construction of a sanitary landfill acceptable in a karstic area? The case of the sanitary landfill site in Fokida, Central Greece. Proceedings of the 13th International Congress, Chania, Sept. 2013. Bulletin of the Geological Society of Greece, Vol. XLVII, No 2, 771-776.

Period after the position of Associate Professor 122) VOUDOURIS, Κ., CHRISTODOULAKOS, Υ., STEIAKAKIS, Ε., ANGELAKIS, Α.Ν. (2013): Hydrogeological Characteristics of Hellenic Aqueducts-like Qanats. Water 5, 1326-1345 (Special Issue: Worldwide History of Water Supply, Sanitation, Wastewater and Stormwater Technologies). 123) PAPACHRISTOU, M., VOUDOURIS, K., KARAKATSANIS, S., D’ALESSANDRO, W., KYRIAKOPOULOS, K. (2014): Geological setting, geothermal conditions and hydrochemistry of south and southeastern Aegean geothermal systems. In “Geothermal Systems & Energy Resources: Turkey and Greece” (Eds Baba, A., Bundschuh, J., Chandrasekharam, D.), CRC Press, Chapter 4, 47-75. 124) MELFOS, V., PAPACHARALAMPOU, C., VOUDOURIS, P., KAIAFA, A., VOUDOURIS, K. (2014): Raw materials used for the millstones production in ancient Greece: Examples from Macedonia and Thrace. Regional Symposium on Water, Wastewater and Environment: Traditions and Culture. 22-24 March, Patras. e-Proceedings, 773-783. 125) TIZRO, T.A., VOUDOURIS, K., VAHEDI, S. (2014): Spatial variation of groundwater quality parameters: A case study from a semiarid region, of Iran. International Bulletin of Water Resources & Development, Vol. (1), No 03, 19th Article-P. I-XIV. 126) MATTAS, Ch., VOUDOURIS, K., PANAGOPOULOS, A. (2014): Integrated groundwater resources management using the DPSIR approach in a GIS environment: A case study from the Gallikos River basin, North Greece. Water 6, Issue 4, 1043-1068. 127) TIZRO, T.A., VOUDOURIS, K., KAMALI, M. (2014): Comparative study of step drawdown and constant discharge tests to determine the aquifer transmissivity: the Kangavar aquifer case study, Iran. Journal of Water Resource & Hydraulic Engineering, Vol. 3, Issue 1, 12-21. 128) FEHDI, C., ROUABHIA, A., MECHAI, A., DEBABZA, M., ABLA, K., VOUDOURIS, K. (2014): Hydrochemical and microbiological quality of groundwater in the Merdja area, Tébessa, North-East of Algeria. Applied Water Science, 1-9, DOI 10.1007/s13201-014-0209-3 129) ANTONAKOS, A., VOUDOURIS, K., LAMBRAKIS, N. (2014): Site selection for drinking-water pumping boreholes using a fuzzy spatial decision support system in the Korinthia

prefecture, SE Greece. Hydrogeology Journal, Vol. 22, 1763-1776. 130) TIZRO, T.A., GHASHGHAIE, M., GEORGIOU, P., VOUDOURIS, K., (2014): Time series analysis of water quality parameters. Journal of Applied Research in Water & Wastewater, Vol. 1, 43-52. 131) ANTONIOU, G.P., LYBERATOS, G., KANETAKI, E.I., KAIAFA, A., VOUDOURIS, K., ANGELAKIS, A.N. (2014): History of Urban Wastewater and Stormwater Sanitation Technologies in Hellas. In “Evolution of Sanitation and Wastewater Technologies through the Centuries”, Chapter 6, 101-148 (Eds Angelakis, A.N. & Rose, J.B.). 132) KAIAFA, A., PAPANIKOLAOU, E., MELFOS, V., PAPACHARALAMPOU, C., VOUDOURIS, K. (2014): Sanitation and Wastewater and Stormwater Management in Ancient Kingdom of Macedonia. In “Evolution of Sanitation and Wastewater Technologies through the Centuries”, Chapter 8, 177-192 (Eds Angelakis, A.N. & Rose, J.B.). 133) PANA E., VOUDOURIS K., PANAGOPOULOS A., ZALIDIS G., TAKAVAKOGLOU V. (2014): The use of virtual water in spatially distributed pricing of irrigation water. Proc. of 10th International Hydrogeological Conference, 8-10 October, Thessaloniki, Vol. 2, 195-203 (in Greek). 134) STEIAKAKIS, Ε., VAVADAKIS, D., ΚRITSOTAKIS, Μ., VOUDOURIS, Κ. (2014): Hydrogeological investigation of Malia aquifer and simulation of groundwater flow under different stresses of exploitation. Proceedings of the 10th International Hydrogeological Conference, 8-10 October 2014, Thessaloniki, Vol. 2, 307-316 (in Greek). 135) VOUDOURIS, K., MELFOS, V., AIDONA, E., KAZAKIS, N., GIOURI, K., STRATIS, J. (2014): Arsenic concentration in groundwater and sediments of Velestino area, Thessaly, Central Greece. Proceedings of the 10th International Hydrogeological Conference, 8-10 October 2014, Thessaloniki, Vol. 1, 759-770. 136) DOMAKINIS, C., OIKONOMIDIS, D., VOUDOURIS, K., ASTARAS, T. (2014): Using geographic information systems (GIS) and remote sensing to map flood extent and to assess flood hazard in Erythropotamos river basin (Evros, Greece). e-Proceendings of 10th International Congress of the Hellenic Geographical Society, Thessaloniki, October 22nd-24th, 2014, pp. 689-709. http://geolib.geo.auth.gr/public/journals/6/10PGC.pdf 137) XATZIPANAGIOTOU, Μ., ΟΙΚΟΝΟΜΙDIS, D., VOUDOURIS, Κ. (2014): Sanitary landfill site selection using G.I.S.: A case study from Zakynthos island. e-Proc. of 10th International Congress of the Hellenic Geographical Society, Thessaloniki, Greece, October 22nd-24th, 2014, pp. 911-924, http://geolib.geo.auth.gr/public/journals/6/10PGC.pdf (in Greek). 138) MARINOS, V., TSAPANOS, Th., PAVLIDIS, S., TSOURLOS, P., CHATZIPETROS, A., VOUDOURIS, K. (2014): Large induced displacements and slides around an open pit lignite mine, Ptolemais basin, Northern Greece. Proc. Engineering Geology for Society and Territory, Landslide processes, Vol. 2, 311-316 (Eds: Lollino, G., Giordan, D. et al.). 139) KAZAKIS, N., KANTIRANIS, N., VOUDOURIS, K., MITRAKAS, M., KAPRARA, E., PAVLOU, A. (2015): Geogenic Cr oxidation on the surface of mafic minerals and the hydrogeological conditions influencing hexavalent chromium concentrations in groundwater. Science of the Total Environment 514, 224-238. 140) KAZAKIS, N., VOUDOURIS, K. (2015): Groundwater vulnerability and pollution risk assessment of porous aquifers to nitrate: Modifying the DRASTIC method using quantitative parameters. Journal of Hydrology 525, 13-25. 141) OIKONOMIDIS, D., DIMOGIANNI, S. KAZAKIS, N., VOUDOURIS, K. (2015): A GIS/Remote Sensing-based methodology for groundwater potentiality assessment in Tirnavos area, Greece. Journal of Hydrology 525, 197-208. 142) BOURNARIS, T., PAPATHANASIOU, J., MANOS, B., KAZAKIS, N., VOUDOURIS, K. (2015): Support of irrigation water use and ecofriendly decision process in agricultural production planning. Operational Research: An International Journal 15, 289-306. 143) KAZAKIS, N., OIKONOMIDIS, D., VOUDOURIS, K. (2015): Groundwater vulnerability and pollution risk assessment with disparate models in karstic, porous and fissured rock aquifers

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http://geolib.geo.auth.gr/public/journals/6/10PGC.pdf

using remote sensing techniques and G.I.S. in Anthemountas basin, Greece. Environmental Earth Sciences, Vol. 74, Issue 7, 6199-6209. 144) KONSTANTINOU, V., PANAGOPOULOS, A., TZIRITIS, E., VOUDOURIS, K. (2015): Water quality of the vadose and saturated zone in part of the sedimentary aquifer system of Kopais basin, Central Greece. Austin Journal of Hydrology, 2015: 2(1): 1013, 1-6 (Open Access). 145) ΚΑZAKIS, Ν., FYTILIS, V., VOUDOURIS, Κ. (2015): Soil vulnerability assessment to nitrogen losses using indices: Application in Epanomi region, North Greece. Proc. of 9th Conference of Hellenic Society of Agricultural Engineers, Thessaloniki, 8-9 October 2015, 191-198 (in Greek). 146) VOUDOURIS, K., KAZAKIS, N., STRATIS, J. (2015): Groundwater quality in the wider area of Volos city, Greece. AQUA 2015, 42nd Congress of International Association of Hydrogeologists. Rome, Italy, 13-18 September. E-poster and oral presentation. Abstract book, Rendiconti Online della Societa Geologica Italiana, Vol. 39, p. 57 (Eds: Ducci, D., Petitta, M., 2016). 147) ΚΑZAKIS, Ν., VOUDOURIS, Κ., KOUMANTAKIS, J. (2015): Groundwater depletion in Anthemountas basin: Mismanagement or climate change? Proc. of 3rd Common Conference of the Hellenic Hydrotechnical Association and Hellenic Committee for Water Resources Management, Athens, 10-12 December, 2015. Vol. I, 199-206 (in Greek). 148) KAZAKIS, N., PAVLOU, A., VARGEMEZIS, G., VOUDOURIS, K., SOULIOS, G., PLIAKAS, F., TSOKAS, G. (2016): Seawater intrusion mapping using electrical resistivity tomographyand hydrochemical data. An application in the coastal area of Eastern Thermaikos Gulf, Greece. Science of the Total Environment 543, 373-387. 149) KAZAKIS, N., VARGEMEZIS, G., VOUDOURIS, K. (2016): Estimation of hydraulic parameters in a complex porous aquifer system using geoelectrical methods. Science of the Total Environment 550, 742-750. 150) VENETSANOU, P., KAZAKIS, N., ΑΝAGNOSTOPOULOU, C., VOUDOURIS, K. (2016): Impacts of rainfall changes on groundwater balance of coastal aquifers: A case study of the Thermaikos Gulf, North Greece. Global Nest: The International Journal, Vol. 18, No 1, 185-196. 151) VENETSANOU, P., VOUDOURIS, K., KAZAKIS, N., MATTAS, C. (2016): Impacts of urbanization, agriculture and touristic development on groundwater resources in the eastern part of Thermaikos Gulf (North Greece): An application of DPSIR model for sustainable development. European Water 51, 3-13. Special Issue: Water Resources Management in a Changing World: Challenges and Opportunities (Eds: Loukas, A., Yegen, R. et al.). 152) ANGELAKIS, A.N., VOUDOURIS, K., MARIOLAKOS, Ι. (2016): Groundwater utilization through the centuries focusing οn the Hellenic civilizations. Hydrogeology Journal, Vol. 24, 1311-1324. 153) STEIAKAKIS, E., VAVADAKIS, D., KRITSOTAKIS, M., VOUDOURIS, K., ANAGNOSTOPOULOU, C. (2016): Drought impacts on the fresh water potential of a karst aquifer in Crete, Greece. Environmental Earth Sciences 75:107, 1-19. 154) KAZAKIS, N., SYRIDES, G., VOUDOURIS, K. (2016): Exploitation of palaeontological and hydrogeological features for geotourism in Mesopotamia-Oinoi, Kastoria, Northen Greece. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 1, 229-237. 155) TSITROULIS, I., VOUDOURIS, K., VASILEIOU, A., MATTAS, C., SAPOUNTZIS, Μ., MARIS, F. (2016): Flood hazard assessment and delimitation of the likely flood hazard zones of the upper part in Gallikos River Basin. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 2, 995-1004. 156) VENETSANOU, P., ΑΝAGNOSTOPOULOU, C., VOUDOURIS, K. (2016): Impacts of climatic changes on hydrologic balance: A case study of Vocha plain, Korinthia. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 2, 1068-1077.

157) KΑZAKIS, N., KANTIRANIS, N., KAPRARA, M., MITRAKAS, M., VARGEMEZIS, G., VOUDOURIS, K., CHATZIPETROS, A., KALAITZIDOU, K. and FILIPPIDIS, A. (2016): Potential Toxic Elements (PTEs) in ground- and spring waters, soils and sediments: An interdisciplinary study in Anthemountas basin, N. Greece. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 4, 2171-2181. 158) VOUDOURIS, K., TSATSANIFOS, C., YANNOPOULOS, S., MARINOS, V., ANGELAKIS, A.N. (2016): Evolution of Underground Aqueducts in Hellenic World. Water Science and Technology: Water Supply 16.5, 1159-1177, IWA Publishing. 159) KΑZAKIS, N., KANTIRANIS, N., KAPRARA, M., MITRAKAS, M., VARGEMEZIS, G., VOUDOURIS, K., CHATZIPETROS, A., KALAITZIDOU, K. and FILIPPIDIS, A. (2016): Potential Toxic Elements (PTEs) in ground and spring waters, soils and sediments: An interdisciplinary study in Anthemountas basin, N. Greece. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 4, 2171-2181. 160) AIDONA, E., GRISON, H., PETROVSKY, KAZAKIS, N., PAPADOPOULOU, L., VOUDOURIS, K. (2016): Magnetic characteristics and trace elements concentration in soils from Anthemountas River basin (North Greece): discrimination of different sources of magnetic enhancement. Environmental Earth Sciences, Vol. 75:1375, 1-16. 161) VENETSANOU, P., ΑΝAGNOSTOPOULOU, C., VOUDOURIS, K. (2017): Climate projections on estimating water balance in Havrias River Basin, Greece. Proc. of 13th International Conference COMECAP, In “Perspectives on Atmospheric Sciences” (Eds: Karacostas, T.S. et al.), Springer, 669-675. 162) VOUDOURIS, K., KAIAFA, A., ZHENG, X.Y., KUMAR, R., ZANIER, K., KOLOKYTHA, E., ANGELAKIS, A. (2017): A brief history of water wells focusing on Balkan, Indian and Chinese civilizations. Proc. of International Water Association, 2nd Regional Symposium on Water, Wastewater and Environment, 24-26 Μαρτίου, Izmir, Turkey, 465-476. 163) KAZAKIS, N., MATTAS, C., PAVLOU, A., PATRIKAKI, O., VOUDOURIS, K. (2017): Multivariate statistical analysis for the assessment of groundwater quality under different hydrogeological regimes. Environmental Earth Sciences, Vol. 76:349, 1-13. 164) ZAVRIDOU, E., KOUMANTAKIS, I., ΚAZAKIS, Ν., VASILIOU, Ε., ΜARKANTONIS, Κ., VOUDOURIS, K. (2017): Hydrogeological-hydrochemical regime of coastal lowland, North of Olymbus. Proc. of 11th International Hydrogeological Congress of Greece, 4-6 Οctober 2017, Αthens, Vol. 1, 159-168. 165) ΜΑNOUTSOGLOU, Ε., ΚRITSOTAKIS, Μ., VOUDOURIS, Κ., STEIAKAKIS, Ε. (2017): Preliminary geothermal investigation for the localization of low enthalpy geothermal fields in Messara, Crete. Proc. of 11th International Hydrogeological Congress of Greece, 4-6 Οctober 2017, Αthens, Vol. 1, 243-254. 166) ΜATTAS, Ch., VERANIS, Ν., ΚAKLIS, Τ., VOUDOURIS, Κ., SOULIOS, Γ. (2017): Groundwater level fluctuation of the alluvial aquifer in almopia basin (Macedonia) correlated with groundwater abstractions. Proc. of 11th International Hydrogeological Congress of Greece, 4-6 Οctober 2017, Αthens, Vol. 1, 291-298. 167) KΙRI, E., RECI, H., PANAGOPOULOS, A., COMO, E., VOUDOURIS, K. (2017): Hydrogeological study using geophysical methods in a karstic area: A case from Tushemisht and Gurras Villages, SE Albania. Proc. of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 2, 283-290. 168) KIRI, E., VOUDOURIS, K., RECI, H., PANAGOPOULOS, A., COMO, E., VENETSANOU, P. (2017): Hydrodynamics’ study of the Ohrid-Prespa Lakes using Stiff diagrams. Proceedings of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 2, 291-300. 169) BUSICO, G., KAZAKIS, N., COLOMBANI, N., MASTROCICCO, M., VOUDOURIS, K., TEDESCO, D. (2017): A modified SINTACS method for groundwater vulnerability and pollution risk assessment in highly anthropized regions based on NO3

- and SO42- concentrations.

Science of the Total Environment 609, 1512-1523. 170) VOUDOURIS, Κ., ΚAZAKIS, Ν., ΚRAKA, Κ., VENETSANOU, P. (2017): Site selection of green points using Geographical Information Systems (GIS). Proc. of 5th International Conference of Hellenic Solid Waste Management Association, 14-15 December, Athens. 171) BUSICO, G., CUOCO, E., KAZAKIS, N., COLOMBANI, N., MASTROCICCO, M., TEDESCO, D., VOUDOURIS, K. (2018): Multivariate statistical analysis to characterize/ discriminate between anthropogenic and geogenic trace element occurrence in the Campania Plain, Southern Italy. Environmental Pollution 234, 260-269. 172) KAZAKIS, N., SPILIOTIS, M., VOUDOURIS, K., PLIAKAS, F-K., PAPADOPOULOS, B. (2018): A fuzzy multicriteria categorization of the GALDIT method to assess seawater intrusion vulnerability of coastal aquifers. Science of the Total Environment 621, 524-534. 173) PATRIKAKI, O., KAZAKIS, N., KOUGIAS, I., PATSIALIS, Th., THEODOSSIOU, N., VOUDOURIS, K. (2018): Assessing flood hazard at river basin scale with an index-based approach: The case of Mouriki, Greece. Geosciences 8 (50), 1-13. 174) ΝΤONA, Μ., GAVRIILIDOU, Ε., ΚΑZAKIS, Ν., VOUDOURIS, Κ. (2018): Investigation of the quantitative and qualitative status of coastal aquifer in Kalikratia-Flogita, Chalkidiki, Greece. Hydrotechnika 27, 54-67. 175) VOUDOURIS, K., MANDRALI, P., KAZAKIS, N. (2018): Preventing groundwater pollution using vulnerability and risk mapping: The case of the Florina basin, NW Greece. Geosciences 8 (129), 1-13. 176) TIZRO, T.A., VOUDOURIS, K., MATTAS, C., KAMALI, M., RABANIFAR, M. (2018): Evaluation of irrigation efficiency effect on groundwater level variation by MODFLOW and WEAP models: A case study from Tuyserkan Plain, Hamedan, Iran. In “Sustainable Agriculture and Food Security”, 121-141 (Eds: Mattas, K., Baourakis, G., Zopounidis, C.), Springer. The total number of papers in scientific journals per year is presented in Figure 2.

Figure 2: Number of papers in scientific journals per year.

(for the year 2018, only until June).

BOOKS

1. Environmental Hydrogeology- Groundwater and environment

Tziolas Publ., Thessaloniki (2009), p. 460 (in Greek) (ISBN 978-960-418-170-4).

Contents: Chapter 1: Introduction- Basic concepts of Hydrogeology Chapter 2: Soil properties Chapter 3: Water Chemistry-Groundwater Quality Chapter 4: Interaction between water and environment Chapter 5: Pollution sources- Water contamination Chapter 6: Disposal of solid wastes- Sanitary landfill Chapter 7: Groundwater vulnerability assessment Chapter 8: Disposal of liquid wastes Chapter 9: Protection and restoration of aquifers Chapter 10: Climate changes and environmental influences Chapter 11: Sea water intrusion in coastal aquifers

2. Water Quality Monitoring and Assessment Editors: Kostas Voudouris & Dimitra Voutsa 2012, INTECH Open Access Publisher www.intechweb.org ISBN: 978-953-51-0486-5 Pages: 602

3. Ecological Water Quality – Water Treatment and Reuse

Editors: Kostas Voudouris & Dimitra Voutsa 2012, INTECH Open Access Publisher ISBN: 9535105084 Pages: 508

4. Engineering Hydrogeology- Groundwater

Tziolas Publ., Thessaloniki (2013), p. 429 (in Greek) (ISBN 978-960-418-407-1).

Contents: Useful statistical concepts in Hydrology Water cycle, Characteristics of river basin Hydrological balance, Rainfall, Evapotranspiration, Infiltration, Surface Runoff Mechanic properties of water Properties of Aquifers Groundwater flow-Darcy law Groundwater level measurements-Flow net-Piezometric maps Geological formations as aquifer systems-Karst Hydrogeology Springs Simulation of groundwater flow

5. Exploitation and Management of Groundwater

Tziolas Publ., Thessaloniki (2015), p. 654 (in Greek) ISBN 978-960-418-469-9

Contents: Useful concepts of groundwater Hydrology Drilling technology- Methods for drilling wells and boreholes Pumping tests Analysis–Borehole Hydraulics Groundwater use Groundwater balance Artificial recharge of groundwater Aquifer systems in Greece Coastal aquifers-Sea water intrusion Exploitation of springs Groundwater management Surface and subsurface investigations of groundwater

9. Proceedings of 10th International Hydrogeological Congress of Greece

Two volumes, p. 1100. ISBN 978-960-88816-8-6 (SET)

Editors: K. Voudouris et al.

EVIDENCE OF ESTEEM- CITATIONS

List of citations per paper In this paragraph, the citations per paper in international journals or conferences are presented (Fig.

4). These citations are collected by Scopus, Wed of Science and personal database. It is found that

460 citations (self citations are excluded), among them 55 in Scopus (Search as author: Voudouris,

K.S., Aristotle University of Thessaloniki).

Figure 4: Diagram of number of citations per year (self citations are excluded) in Scopus (for the year 2018 only until June).

ABSTRACTS OF PAPERS Period after the position of Associate Professor

122) VOUDOURIS, Κ., CHRISTODOULAKOS, Υ., STEIAKAKIS, Ε., ANGELAKIS, Α.Ν. (2013): Hydrogeological Characteristics of Hellenic Aqueducts-like Qanats. Water 5, 1326-1345 (Special Issue: Worldwide History of Water Supply, Sanitation, Wastewater and Stormwater Technologies). Abstract: In ancient Hellas water management was begun in the early Minoan Era (ca. 3200-1100 BC) and related to the geomorphology, the geology, the topography and the local climatic, hydrological and socio-political conditions. Historical and archaeological evidences show that ancient Greeks had developed even qanat-related technologies since the Chassical times. During democratic periods the focus of water management was on sustainable small scale, safe and cost effective management practices, and institutional arrangements, whereas at oligarchic periods, emphasis was on the construction of large-scale hydraulic projects including aqueducts and/or qanats, mostly related to the public sectors. Aqueducts-like qanats are gently sloping, artificially constructed underground galleries, which bring groundwater from the mountainous area to the lowlands, where water is used, sometimes several kilometers away. It is worth noticing that no large-scale lifting techniques were available, and water was transferred from the source (usually a spring) by aqueducts (qanats) from a higher elevation to a lower level by gravity. Historically, the aqueduct-like qanat technology was developed by Persians in the middle of 1st Millennium

BC, and spread towards Arabian Peninsula and Egypt. The expansion of Islam led to diffusion of qanats in the Mediterranean countries (e.g. Spain, Italy, and Cyprus). Much of the population of Iran and other arid countries in North Africa and in Asia depend on water supply by aqueducts-like qanats even today. This technology is characterized by its durability and sustainability, although a aqueduct-like qanat is expensive, both in construction and maintainance. It is pointed out that, the technique of tunneling was used during the Classical period in ancient Hellas. Since the well known tunnel at the island of Samos, Hellas was designed and constructed by Eupalinos (ca. 530 BC), several underground tunnels (with and without well-like vertical shafts) in order to convey water from one location to another one located in a lower level were implemented in this country. Several aqueducts (qanat) paradigms (e.g. in Athens, in islands of Crete and Rhodes and in the area of Serres in north country), which are in use even today are presented and discussed. Overall, it seems that water-related problems of modern societies are not very different from those during antiquity.

123) PAPACHRISTOU, M., VOUDOURIS, K., KARAKATSANIS, S., D’ALESSANDRO, W., KYRIAKOPOULOS, K., (2014): Geological setting, geothermal conditions and hydrochemistry of south and southeastern Aegean geothermal systems. In “Geothermal Systems & Energy Resources: Turkey and Greece” (Eds Baba, A., Bundschuh, J., Chandrasekharam, D.), CRC Press, Chapter 4, 47-75. The aim of this chapter is to summarize the geological context and determine and interpret the water chemistry of South Aegean Active Volcanic Arc (SAVA) geothermal systems, which are generally related to the volcanic activity. The Aegean region represents an active convergent zone, where continental micro-plates exhibit a complex interaction under the influence of the overall N–S convergence between the African and the Eurasian plates. From a geological point of view, most of the islands belong to the Attic-Cycladic massif and are composed of metamorphic rocks such as schists, phyllites, marbles and granite. Milos, Kimolos and Nisyros are almost entirely covered by recent volcanic rocks. They are characterized by the presence of several surface thermal manifestations such as hot springs with relatively high temperatures. The geothermal potential of the area was confirmed in most cases by drilling exploration that has revealed high temperatures, especially in Milos and Nisyros islands. The volcanic arc is characterized by the presence of high CO2 flux derived from deep geogenic sources either directly from the mantle or from the thermo-metamorphism of marine limestones. The majority of aquifers, which discharge through springs in islands of the SAVA, are associated with the seawater intrusion and the mixing of meteoric waters and deep thermal water. Depending on its residence time in the aquifer, seawater may modify the chemical composition as shown by losing Mg2+ and SO4

2– ions and acquiring SiO2, Ca2+, HCO3–, NH4

+ and B after water-rock interaction at variable depth and temperature. High silica concentrations are recorded in Milos and Nisyros thermal springs, due to the presence of active hot hydrothermal system. The predominant hydrochemical water type is Na-Cl. This type is recorded in samples from island geothermal springs and could be associated with seawater mixed with meteoric water. Most of these samples are characterized by a Na/Cl ratio very close to that of seawater (0.84). The presence of trace elements is attributed to dissolution of minerals and hydrothermal solutions of the volcanic arc formations. 124) MELFOS, V., PAPACHARALAMPOU, C., VOUDOURIS, P., KAIAFA, A., VOUDOURIS, K. (2014): Raw materials used for the millstones production in ancient Greece: Examples from Macedonia and Thrace. Regional Symposium on Water, Wastewater and Environment: Traditions and Culture. 22-24 March, Patras. e-Proceedings, 773-783. Abstract Millstones were water powered, horizontal or vertical wheeled, since the 1st century BC, according to written documents. The raw materials used in ancient Greece for manufacturing millstones since the Prehistoric times, were very restricted, mainly sandstones and volcanic or pyroclastic rocks. The sources of the raw materials for the millstones in Greece varied throughout the times depending on the quality and suitability of the rocks. The Aegean islands Milos,

Kimolos, Polyaigos, Santorini, Nisyros, Skyros, Aigina, Limnos, Mytilini, and other areas such as Poros and Methoni in Peloponnesos were some of the provenance locations where the millstones were quarried and exported in other areas. In Macedonia and Thrace the main raw materials were from local sources in the beginning, during the Prehistoric times. Later, a more intense production of millstones started in various areas depending on the rock type of the raw materials. Representative examples for millstones made of sandstones are found in Chalkidiki and in Kariani of Kavala and of volcanic rocks in Petrota of Rhodopi and in Aloros of Almopia. 125) TIZRO, T.A., VOUDOURIS, K., VAHEDI, S. (2014): Spatial variation of groundwater quality parameters: A case study from a semiarid region, of Iran. International Bulletin of Water Resources & Development, Vol. (1), No 03, 19th Article-P. I-XIV. The Zarin Abad plain is located in Zanjan province in the western part of Iran. In this study, spatial analysis was used to interpret some of the chemical parameters of groundwater from the unconfined aquifer. For this reason, 61 groundwater samples were collected from groundwater monitoring wells to investigate the characteristics of groundwater quality. Maps showing the geographical distribution of hydrochemical parameters were prepared and the impact of various geological formations on the groundwater quality in the region is considered. High values of EC value in the western parts of the plain could be associated with the lithological formations composed of marls and evaporates. Based on SAR values, it is concluded that the majority of groundwater samples is relatively suitable for irrigation use. Analysis of the spatial coherence of the variables from each other was performed using selected models and the Kriging, Co-Kriging and Inverse Weighted Distance (IWD) methods were ultimately used to decipher the spatial variation of the parameters. The results obtained through these methods were compared by root-mean-square error (RMSE) and mean absolute error (MAE). It was found that the Co-Kriging model is the most optimal technique, for studying the spatial distribution in groundwater quality parameters.The aforementioned geostatistical analysis and the produced maps are a useful tool for hydrogeologists and engineers to estimate water quality in areas without sampling points (e.g. in the northern part of the study area). In addition, are useful in order to protect the groundwater quality and apply a strategy of sustainable water management. The results provide important information, while the spatial distribution maps of groundwater quality could potentially be used by local authorities and decision makers in order to assess vulnerable zones and prevent further pollution of already contaminated areas. 126) MATTAS, Ch., VOUDOURIS, K., PANAGOPOULOS, A. (2014): Integrated groundwater resources management using the DPSIR approach in a GIS environment: A case study from the Gallikos River basin, North Greece. Water 6, Issue 4, 1043-1068. The Gallikos River basin is located in the northern part of Greece, and the coastal section is part of a deltaic system. The basin has been influenced by anthropogenic activities during the last decades, leading to continuous water resource degradation. The holistic approach of the Driver-Pressure-State-Impact-Response (DPSIR) framework was applied in order to investigate the main causes and origins of pressures and to optimize the measures for sustainable management of water resources. The major driving forces that affect the Gallikos River basin are urbanization, intensive agriculture, industry and the regional development strategy. The main pressures on water resources are the overexploitation of aquifers, water quality degradation, and decrease of river discharge. Recommended responses were based on the Water Framework Directive (WFD) 2000/60/EC, and sum up to rationalization of water resources, land use management and appropriate utilization of waste, especially so effluent. The application of the DPSIR analysis in this paper links the socioeconomic drivers to the water resource pressures, the responses based on the WFD and the national legislation and is as a useful tool for land use planning and decision making in the area of water protection. 127) TIZRO, T.A., VOUDOURIS, K., KAMALI, M. (2014): Comparative study of step drawdown and constant discharge tests to determine the aquifer transmissivity: the Kangavar

aquifer case study, Iran. Journal of Water Resource & Hydraulic Engineering, Vol. 3, Issue 1, 12-21. Evaluation of the hydraulic parameters of aquifers is essential for estimating and developing groundwater resources. Constant discharge pumping tests, monitoring the groundwater level variations in observation wells, can be expensive and time consuming. This paper introduces an approach that is efficient and economical and probably can replace the full pumping test. Well-choosing through field survey, constant discharge pumping tests and step drawdown tests are used in this study to determine the transmissivity (T) of the Kangavar aquifer, located in western Iran. To describe the geological characteristics of the subsurface formations, 16 vertical electrical soundings were performed and interpreted using Schlumberger array. To estimate the transmissivity by a step drawdown test, the aquifer coefficient (n) in well was computed by solving the Miller and Weber equation, through Fixed Point Iteration numerical method by using Visual Basic 6.5 programming. Contours of transmissivity attained through constant discharge and step drawdown tests were plotted for the study area, using kriging method. The results obtained were analyzed applying statistical comparisons, through which no significant difference was observed. Finally, it is concluded that step drawdown test can be used as an alternative to the expensive and time consuming constant discharge tests. 128) FEHDI, C., ROUABHIA, A., MECHAI, A., DEBABZA, M., ABLA, K., VOUDOURIS, K. (2014): Hydrochemical and microbiological quality of groundwater in the Merdja area, Tébessa, North-East of Algeria. Applied Water Science, 1-9, DOI 10.1007/s13201-014-0209-3 The aim of this study was to perform a preliminary assessment of the hydrochemical and microbial groundwater quality of the Merdja plain (Tébessa area). Twenty samples of groundwater collected from Bekkaria (Site 1) to Ain Chabro (Site 2) were assessed for their suitability for human consumption. Groundwater from the aquifer in the Merdja area can be divided into two major groups according to geographical locations and chemical compositions. Water in the center part of the study area is characterized by the dominance of chloride, sulfate, sodium, and potassium; whereas waters in the limestone aquifers in the west are dominated by the same cations but have higher concentrations of bicarbonate. Microbiological parameters were determined in 13 groundwater samples collected from the study area. Total coliforms, thermotolerant coliforms, E. coli, Enterococcus spp., Salmonella sp., Staphylococcus spp., and P. aeruginosa were detected in 96.36, 88.18, 100, 47.5, 97.27, 96.7, and 75 % of the groundwater samples, respectively. The pollution of groundwater comes from a variety of sources, Ouadi El Kebir River, including land application of agricultural chemicals and organic wastes, infiltration of irrigation water, septic tanks, and infiltration of effluent from sewage treatment plants, pits, lagoons, and ponds used for storage. 129) ANTONAKOS, A., VOUDOURIS, K., LAMBRAKIS, N. (2014): Site selection for drinking-water pumping boreholes using a fuzzy spatial decision support system in the Korinthia prefecture, SE Greece. Hydrogeology Journal, Vol. 22, 1763-1776. The implementation of a geographic information system (GIS)/fuzzy spatial decision support system in the selection of sites for drinking-water pumping boreholes is described. Groundwater is the main source of domestic supply and irrigation in Korinthia prefecture, south-eastern Greece. Water demand has increased considerably over the last 30 years and is mainly met by groundwater abstracted via numerous wells and boreholes. The definition of the most “suitable” site for the drilling of new boreholes is a major issue in this area. A method of allocating suitable locations has been developed based on multicriteria analysis and fuzzy logic. Twelve parameters were finally involved in the model, prearranged into three categories: borehole yield, groundwater quality, and economic and technical constraints. GIS was used to create a classification map of the research area, based on the suitability of each point for the placement of new borehole fields. The coastal part of the study area is completely unsuitable, whereas high values of suitability are recorded in the south-western part. The study demonstrated that the method of multicriteria analysis in combination with fuzzy logic is a useful tool for selecting the

best sites for new borehole drilling on a regional scale. The results could be used by local authorities and decision-makers for integrated groundwater resources management. 130) TIZRO, T.A., GHASHGHAIE, M., GEORGIOU, P., VOUDOURIS, K., (2014): Time series analysis of water quality parameters. Journal of Applied Research in Water & Wastewater, Vol. 1, 43-52. Water quality is a worldwide problem which affects human beings lives fundamentally. Water scarcity is intensified in result of quality deterioration. Different factors such as population increase, economic development and water pollution could be considered as the origins of the problem. The study and forecasting of water quality is necessary to prevent serious water quality deteriorations in future. Different methodologies have been used to predict and estimate the quality of water. In present study using time series modeling, the quality of Hor Rood River is studied at Kakareza station using time series analysis. Nine (9) parameters of water quality are studied such as: TDS, EC, HCO3

-, SO42-, Mg2+, Ca2+, Na+, pH and SAR. Investigation of

observed time series show that there is an increasing trend for all parameters unless Na+, pH and SAR. The order of model for each parameter was determined using auto correlation function (ACF) and partial auto correlation function (PACF) of time series. ARIMA (autoregressive, integrated, moving average) model was found suitable to generate and forecast the quality of river water. AIC, R2, RMSE and VE % criteria were used for evaluating the generation and forecasting results. Results show that time series modeling is quite capable of water quality forecasting. For all generated and forecasted parameters the value of R2 was greater than 0.66 except for SO4

2-. The value of R2 for generated SO42- was 0.48 and this value was 0.43 for

forecasting this parameter. Also the study show that the quality of water is deteriorating based on an increasing trend for the majority of parameters and needs serious managerial actions. 131) ANTONIOU, G.P., LYBERATOS, G., KANETAKI, E.I., KAIAFA, A., VOUDOURIS, K., ANGELAKIS, A.N. (2014): History of Urban Wastewater and Stormwater Sanitation Technologies in Hellas. In “Evolution of Sanitation and Wastewater Technologies through the Centuries”, Chapter 6, 101-148 (Eds Angelakis, A.N. & Rose, J.B.). The status of urban wastewater and stormwater technologies in Ancient Hellas is reviewed, based on the results of archaeological studies of the 20th century. Emphasis is placed on the construction, operation and management of wastewater and storm water sewerage systems during the Minoan times (2nd Millennium BC). The achievements of this period in supporting the hygienic and functional requirements of palaces and cities were so advanced, that they could be paralleled only to modern urban water systems. Many remains of sanitary structures have been found in Minoan sites (e.g. Knossos, Phaistos, Malia, Gournia, and Tylissos). The hygienic installations are considered as a characteristic factor of the standard of living and economic prosperity, in both domestic and public uses. Due to these reasons, lavatories had become, and often still are considered luxury items. These advanced technologies were further developed during the Hellenistic, Roman, and Venetian periods. In parallel, the advanced Minoan technologies expanded all over Hellas in later periods of the Hellenic civilizations, e. g. in the Mycenaean, Archaic, Classical, Hellenistic, and Roman periods. Thus, the main objectives of this Chapter are: (a) to review the health and environmental risks arising from the water supply and wastewater and stormwater management, (b) to briefly present the trends and the developments in sanitation technologies in Ancient Hellas, (c) to provide information on the status and to review and compare sanitation technologies among several Hellenic civilizations, and (d) to develop a timeline for urban wastewater and stormwater sanitation technologies in Hellas. The information provided is expected to contribute to "how to learn from the past". 132) KAIAFA, A., PAPANIKOLAOU, E., MELFOS, V., PAPACHARALAMPOU, C., VOUDOURIS, K. (2014): Sanitation and Wastewater and Stormwater Management in Ancient Kingdom of Macedonia. In “Evolution of Sanitation and Wastewater Technologies

through the Centuries”, Chapter 8, 177-192 (Eds Angelakis, A.N. & Rose, J.B.). In this chapter, special constructions related to the sanitation and wastewater and stormwater management in the most famous cities of the ancient Macedonian Kingdom, such as Pella, Aigai, Dion, Thessaloniki, Olynthus, Amphipolis and Philippoi, are examined. It is well documented that during the Hellenistic and especially the Roman period, Macedonians had a deep knowledge of the hydraulic technology and the ability to create developed and successful urban water supply and drainage systems. Urban hydraulic networks in Hellenistic and Roman Macedonia were characterized by a great technical and functional progress, planned and built to cover everyday needs. They were performed each time by a central authority, according to an existing legislation and institutional framework for water management. 133) PANA E., VOUDOURIS K., PANAGOPOULOS A., ZALIDIS G., TAKAVAKOGLOU V. (2014): The use of virtual water in spatially distributed pricing of irrigation water. Proc. of 10th International Hydrogeological Conference, 8-10 October, Thessaloniki, Vol. 2, 195-203 (in Greek). Water is one of the most beneficial natural assets and has a vital essence in shaping human evolution. Nowadays though, various human activities consume or pollute large quantities of water, with the agricultural usage being considered as the most water consuming. The total water usage and pollution is associated with the consumption of each society resulting to the necessity for the pricing of water demanded for the production of such products, which is consistent with the principle of the Water Framework Directive (WFD, 2000/60 EC), the "polluter pays". An important tool that the Directive introduces is the cost recovery of water services, setting aspects such as the financial, the environmental and the resource cost. In bibliography various attempts for the pricing of irrigation water on large regional scales, have been made, but water pricing at local level remains problematic. Considering the above, aim of this work is to develop and apply a methodological framework for the use of virtual water in the assessment of spatially distributed cost of irrigation water at the local level of ILOTs (Land Parcel Information System). As study area of this work was selected the river basin of Tirnavos of Eastern Thessaly. The water calculated, is referred as "Virtual Water" meaning the embodied water in a product, not by the actual meaning, but by a virtual way. In the agricultural products equals to the water receiving crops by rainfall (Green Virtual Water) and the water needed for their irrigation (Blue Virtual Water). Objectives of this study was: 1) The production of an agricultural crop map through high spatial accuracy remote sensing data using GIS, 2) the calculation of virtual water through the agricultural crops map and the water balance equation and 3) the final pricing of the "blue virtual water", spatially distributed by ILOT. Specifically, field data was used for the classification of a multispectral satellite image SPOT-5, in the crops of the study area. The evapotranspiration of crops and the effective rainfall, were calculated to estimate the virtual water. Thus, was estimated spatial virtual water of six crops such as cotton, which is equal to 1,112 L/Κg. The calculation of the total volume of blue virtual water of agricultural use per sub-area (TOEB) in the study area, enabled the pricing based on the WFD distinguishing three cost aspects: the operational, environmental and resource cost. Thus, an appropriate mathematical model was used to estimate the individual cost in the region and it was found that ranges from 75 to 113€/103 m3. Finally, the cost was deduced per ILOT and the results were illustrated on maps depicting the cost in the 1671 ILOTs. 134) STEIAKAKIS, Ε., VAVADAKIS, D., ΚRITSOTAKIS, Μ., VOUDOURIS, Κ. (2014): Hydrogeological investigation of Malia aquifer and simulation of groundwater flow under different stresses of exploitation. Proceedings of the 10th International Hydrogeological Conference, 8-10 October 2014, Thessaloniki, Vol. 2, 307-316 (in Greek). The planned power plant in Municipality of Malia (Crete) is a hybrid Pumping Storage Plant (PSP). The storage system of the scheme consists of two artificial reservoirs (approximately 1,000,000 m3 each) and the hydro scheme (with 4 hydro-turbines) will have a total installed capacity of 100 MW. This required quantity of water for the initial filling of the lower reservoir,

and afterwards for the replenishment of the water losses mainly due to evaporation, could be implemented either by pumping water out of wells drilled in the local aquifer. The area where the project is located is composed entirely of limestone formations (Cretaceous and Jurassic formations) where important and numerous karstic issues are found. Underneath these rocks, a series of alternating chloritic schists, phyllites and quartzites (belonging to the Phyllite-Quartzite series) acts as the impermeable substrate of the region. The stratigraphy terminates with deposits that consist of bioclastic Messinian limestones and Quaternary clastic sediments hosting two aquifers of limited extent which are hydraulic communicated with the underlying karstic aquifer. The exploitation of the aquifer system is realized by a great number (more than 500) of shallow dug wells mainly in the coastal lowland zone, and by more than 50 deeper boreholes in the high land area. The total annual volume of drawn water from the aquifer, amounts to over 13×106 m3. Moreover, the mean annual discharge of Grammatikakis and Almyros springs are 138,000 m3 and 2.7×106 m3, respectively. The scope of this work is to propose well locations that will likely produce maximum yield without impact on the existing exploitation of the aquifer. This was achieved by the development of a numerical model (under steady state conditions) and prediction of aquifer’s response under different stresses (abstraction of ground water). A three-dimensional groundwater flow model using the MODFLOW software was used to simulate the karst aquifer. Despite insufficient number of measurements and the non-concurrent initial data, the specification of appropriate boundary conditions enables forecasts of changes to the groundwater level to be evaluated, under different stresses and recharge conditions. For the numerical model development, constant head cells were defined in the northern part of the model area (in the coastal zone) and at the edges of the hydrogeology basin, where lateral inflows/ outflows to/from the system are possible. Based on various scenarios, pumping of existing wells belonging to the municipality of Malia, is proposed as the first choice (pumping the wells GMA8 and GMA9 with a rate of 50 m3/h and the wells GM3 and GM5 with a rate 60 and 35 m3/h respectively, 18 hours per day from November until April for two years period). This scenario is completely safe and it does not cause adverse effects on the aquifer. 135) VOUDOURIS, K., MELFOS, V., AIDONA, E., KAZAKIS, N., GIOURI, K., STRATIS, J. (2014): Arsenic concentration in groundwater and sediments of Velestino area, Thessaly, Central Greece. Proceedings of the 10th International Hydrogeological Conference, 8-10 October 2014, Thessaloniki, Vol. 1, 759-770. Forty groundwater and forty-two sediment samples (3 samples from 14 spots at depths of 0, 0.5 and 1.0 m) from the broader area of Volos city were collected in order to investigate the heavy metals concentration with emphasis in arsenic. The dominant hydrochemical groundwater type is Ca (Mg)-HCO3 and Na-Cl (water affected by salinization). Groundwater arsenic concentrations range from 1 to 11 μg/L. Groundwater quality is characterized by relatively low NO3

- concentration. High arsenic concentrations are recorded at the shallow aquifer systems and are decreased with the sampling depth. Based on chemical analyses from soil samples it is concluded that the As concentrations are relatively low, with the exception of three sampling sites. The results of the present study demonstrate that As in the majority of the samples is controlled by geological factors such as the lithology of the broader area and the presence of ore mineralizations which include As-bearing minerals. A positive correlation between As concentrations with Fe2O3, MnO, Al2O3 and with the majority of the other analyzed metals is recorded indicating that arsenic is mainly adsorbed and so reserved in the crystal lattice of the Fe-Mn and Al-bearing oxides. Furthermore, the magnetic susceptibility shows a positive correlation with heavy metals especially with As and Mn. 136) DOMAKINIS, C., OIKONOMIDIS, D., VOUDOURIS, K., ASTARAS, T. (2014): Using geographic information systems (GIS) and remote sensing to map flood extent and to assess flood hazard in Erythropotamos river basin (Evros, Greece). e-Proc. of 10th International Congress of the Hellenic Geographical Society, Thessaloniki.

According to 2007/60/EC Directive of the European Parliament and the Council of the European Union, floods are recognised as a phenomenon that causes severe damage upon both the environment and mankind. Having this Directive in mind, the present study focuses on the flood of the river basin of the tributary river of Evros called Erythropotamos. Also, taking under consideration that the event occurredbetween the 9thand 18th of February in 2010 in this area, this preliminary study attempts to achieve detection and mapping of its extent, along with determining if there is a connection between the latter and the geologic formations of the study area. Moreover, data layers such as land cover, hydrogeology, topography and EU-DEM’s 1 arc second (approximately 25m) spatial resolution elevation data, were used in order to achieve hazard assessment in Erythropotamos’ catchment with the aid of Hec-RAS software and its ArcGIS extension HEC-GeoRAS by compiling flood hazard and risk maps. Finally, these maps were evaluated by comparingthe flood extent depicted in them with the flood extent that was initially mapped with ENVISAT imagery by usingmeasures of fit tests. The results evaluated the existing methodologies for their effectivenessand accuracy to achieve flood risk assessment mapping and raise the question if there are ways in which these results can be improved. 137) XATZIPANAGIOTOU, Μ., ΟΙΚΟΝΟΜΙDIS, D., VOUDOURIS, Κ. (2014): Sanitary landfill site selection using G.I.S.: A case study from Zakynthos island. e-Proc. of 10th International Congress of the Hellenic Geographical Society, Thessaloniki (in Greek). Sanitary landfill is the most cost-effective system of solid waste disposal for most urban areas in developing countries. Landfill sitting is an extremely difficult task to accomplish, because the site selection process depends on different factors and regulations. Landfill sitting process requires many different criteria since it has to combine social, environmental, technical, and financial factors. Environmental factors are very important because the landfill may affect the biophysical environment and the ecology of the surrounding area. In this study, candidate sites for an appropriate landfill area in Zakynthos Island are determined, by using the integration of geographic information systems (GIS) and multi-criteria evaluation (MCE). ArcGIS 9.3 software and its extensions were used as the GIS tool since it is able to perform suitability analysis using MCE analysis. To identify appropriate landfill areas in Zakynthos Island, various of geographical and geo-morphological data were digitized. Nine input map layers including distance from urban areas, transportation network and airports, distance from archaeological sites, land use/land cover, slopes, hydro-permeability of lithological units, distance from faults and distance from hydrographic network are used in constraint mapping. A map was created for each suitability criterion and a final composite map was finally produced with the help of Boolean Algebra by simple overlaying of the individual maps. According to the map, 0,209623 km2 of the study area is most suitable. At the end of the analyses, two candidate sites are determined. A geographic information system (GIS) is a computer system designed to capture, store, manipulate, analyze, manage and present all types of geographical data. GIS can be thought of as a system that provides spatial data entry, management, retrieval, analysis, and visualization functions. Geographical Information System/GIS are a very useful tool, not only for creating thematic maps but mainly for decision making and rational management of the environment. 138) MARINOS, V., TSAPANOS, Th., PAVLIDIS, S., TSOURLOS, P., CHATZIPETROS, A., VOUDOURIS, K. (2014): Large induced displacements and slides around an open pit lignite mine, Ptolemais basin, Northern Greece. Proc. Engineering Geology for Society and Territory, Landslide processes, Vol. 2, 311-316 (Eds: Lollino, G., Giordan, D. et al.). The paper studies and analyses the induced displacements and slide failures around a broad area of an open excavations in lignite mine in Ptolemais basin in northern Greece. Significant ruptures and horizontal displacements were observed 600m westwards from the open pit, where the village of Mavropigi is located. A significant number of houses in the village have sustained damages. The causes of the ground movement and their probable connection with the open excavations of the lignite mine were investigated. The slide phenomena are located inside marly

formations. A numerical analysis, based on the engineering geological model, was performed to simulate the deformations and the shear and tensile failures and to evaluate the exact mechanism of failure. These displacements and local slide failures are clearly connected with the exploitation of the open pit lignite mine. 139) KAZAKIS, N., KANTIRANIS, N., VOUDOURIS, K., MITRAKAS, M., KAPRARA, E., PAVLOU, A. (2015): Geogenic Cr oxidation on the surface of mafic minerals and the hydrogeological conditions influencing hexavalent chromium concentrations in groundwater. Science of the Total Environment 514, 224-238. This study aims to specify the source minerals of geogenic chromium in soils and sediments and groundwater and to determine the favorable hydrogeological environment for high concentrations of Cr(VI) in groundwaters. For this reason, chromium origin and the relevant minerals were identified, the groundwater velocity was calculated and the concentrations of Cr(VI) in different aquifer types were determined. Geochemical and mineralogical analyses showed that chromium concentrations in soils and sediments range from 115 to 959 mg/kg and that serpentine prevails among the phyllosilicates. The high correlation between chromium and serpentine, amphibole and pyroxene minerals verifies the geogenic origin of chromium in soils and sediments and, therefore, in groundwater. Manganese also originates from serpentine, amphibole and pyroxene, and is strongly correlated with chromium, indicating that the oxidation of Cr(III) to Cr(VI) is performed by manganese-iron oxides located on the surface of Cr-Mn-rich minerals. Backscattered SEM images of the soils revealed the unweathered form of chromite grains and the presence of Fe-Mn-rich oxide on the outer surface of serpentine grains. Chemical analyses revealed that the highest Cr(VI) concentrations were found in shallow porous aquifers with low water velocities and their values vary from 5 to 70 μg/L. Cr(VI) concentrations in ophiolitic complex aquifers ranged between 3 and 17 μg/L, while in surface water, karst and deeper porous aquifers, Cr(VI) concentrations were lower than the detection limit of 1.4 μg/L.

140) KAZAKIS, N., VOUDOURIS, K. (2015): Groundwater vulnerability and pollution risk assessment of porous aquifers to nitrate: Modifying the DRASTIC method using quantitative parameters. Journal of Hydrology 525, 13-25. In the present study the DRASTIC method was modified to estimate vulnerability and pollution risk of porous aquifers to nitrate. The qualitative parameters of aquifer type, soil and impact of the vadose zone were replaced with the quantitative parameters of aquifer thickness, nitrogen losses from soil and hydraulic resistance. Nitrogen losses from soil were estimated based on climatic, soil and topographic data using indices produced by the GLEAMS model. Additionally, the class range of each parameter and the final index were modified using nitrate concentration correlation with four grading methods (natural breaks, equal interval, quantile and geometrical intervals). For this reason, seventy-seven (77) groundwater samples were collected and analyzed for nitrate. Land uses were added to estimate the pollution risk to nitrates. The two new methods, DRASTIC-PA and DRASTIC-PAN, were then applied in the porous aquifer of Anthemountas basin together with the initial versions of DRASTIC and the LOSN-PN index. The two modified methods displayed the highest correlations with nitrate concentrations. The two new methods provided higher discretisation of the vulnerability and pollution risk, whereas the high variance of the (ANOVA) F statistic confirmed the increase of the average concentrations of NO3

-, increasing from low to high between the vulnerability and pollution risk classes. The importance of the parameters of hydraulic resistance of the vadose zone, aquifer thickness and land use was confirmed by single-parameter sensitivity analysis. 141) OIKONOMIDIS, D., DIMOGIANNI, S. KAZAKIS, N., VOUDOURIS, K. (2015): A GIS/Remote Sensing-based methodology for groundwater potentiality assessment in Tirnavos area, Greece. Journal of Hydrology 525, 197-208. The aim of this paper is to assess the groundwater potentiality combining Geographic Information Systems and Remote Sensing with data obtained from the field, as an additional tool

to the hydrogeological research. The present study was elaborated in the broader area of Tirnavos, covering 419.4 km2. The study area is located in Thessaly (central Greece) and is crossed by two rivers, Pinios and Titarisios. Agriculture is one of the main elements of Thessaly’s economy resulting in intense agricultural activity and consequently increased exploitation of groundwater resources. Geographic Information Systems (GIS) and Remote Sensing (RS) were used in order to create a map that depicts the likelihood of existence of groundwater, consisting of five classes, showing the groundwater potentiality and ranging from very high to very low. The extraction of this map is based on the study of input data such as: rainfall, potential recharge, lithology, lineament density, slope, drainage density and depth to groundwater. Weights were assigned to all these factors according to their relevance to groundwater potential and eventually a map based on weighted spatial modeling system was created. Furthermore, a groundwater quality suitability map was illustrated by overlaying the groundwater potentiality map with the map showing the potential zones for drinking groundwater in the study area. The results provide significant information and the maps could be used from local authorities for groundwater exploitation and management. 142) BOURNARIS, T., PAPATHANASIOU, J., MANOS, B., KAZAKIS, N., VOUDOURIS, K. (2015): Support of irrigation water use and ecofriendly decision process in agricultural production planning. Operational Research: An International Journal 15, 289-306. In this paper a Multiple Criteria Mathematical Programming model has been developed integrating vulnerability maps; its purpose is to optimize and facilitate the decision making process relating to the problems of water management, land use and environmental protection. The model is used to support irrigation water use and eco-friendly decision processes in agricultural production planning. It has been developed in the context of the research project entitled EU Water (Transnational integrated management of water resources in agriculture for European water emergency control). For accessing the vulnerability of agricultural land to water and nitrogen losses, a set of indices were utilised. It was implemented in the Sarigkiol basin in the north-eastern part of the Kozani prefecture in Northern Greece, combining different criteria to a utility function under a set of constraints concerning different categories of labour, land, available capital, etc. On the same time the model is taking into account the vulnerability maps which have been developed for the area. The aim of the study was to achieve optimum crop plans in the aforementioned area and it was further used to simulate different scenarios and policies, due to changes on different social, economic and environmental parameters (e.g. different levels of chemicals or water consumption per crop). The decision maker can get alternative production plans and agricultural land uses as well as the social, economic and environmental impact of different policies. Results show that the model can be considered as an important planning tool enabling the regional authorities to design optimal spatial development policies and protect groundwater from the excessive fertilizer and other pollution agents use. 143) KAZAKIS, N., OIKONOMIDIS, D., VOUDOURIS, K. (2015): Groundwater vulnerability and pollution risk assessment with disparate models in karstic, porous and fissured rock aquifers using remote sensing techniques and G.I.S. in Anthemountas basin, Greece. Environmental Earth Sciences, Vol. 74, Issue 7, 6199-6209. Disparate methods of intrinsic groundwater vulnerability and remote sensing were applied in Anthemountas river basin (North Greece), covering an area of 374 km2. Three types of aquifers are present within the basin: porous, karstic and aquifers of fissured rocks. Vulnerability and risk pollution maps were produced using the DRASTIC, EPIK, AVI and DRASTIC-FM methods in a GIS context and the results were compared and evaluated. The methods used different numbers of parameters with different weightings and produced relatively different results. The original DRASTIC method underestimates the vulnerability degrees in fissured rock aquifers, while in porous aquifers the discretization is poor, in contrast with the AVI method which give more satisfactory results. The vulnerability of the fissured rock aquifer as estimated by the DRASTIC-FM method shows significant differences compared to the original DRASTIC method.

Groundwater pollution risk is strongly dependant on vulnerability and consequently the use of specialized vulnerability methods provides representative and more accurate results. 144) KONSTANTINOU, V., PANAGOPOULOS, A., TZIRITIS, E., VOUDOURIS, K. (2015): Water quality of the vadose and saturated zone in part of the sedimentary aquifer system of Kopais basin, Central Greece. Austin Journal of Hydrology, 2015:2(1): 1013, 1-6 (Open Access). This paper aims at presenting the study of groundwater quality and more specifically of the aquifer and the leachates of sub-soil at the central part of Viotikos Kifisos river basin-central Greece. Quality characterization of the aquifer system was based on the principles set in the Water Framework Directive-WFD (2000/60/EC), adopting as standards the maximum admissible concentrations for water intended for human consumption. Results were based on the analysis of hydrochemical determinations carried out in 194 water samples collected from the vadose zone (through a prototype sampling system) and the shallow wells of the saturated zone, over the period 2009-2011. Spatio-temporal study of water quality characteristics was performed and the hydrochemical character of water samples was assessed using the expanded Durov diagram. As suggested by the analysis of the hydrochemical data, the bedrock of the basin that is formed of carbonate rocks and a schist-chert formation with ultrabasic blocks (mélange), control the dominant hydrochemical character of the analyzed water samples. Hence a strong calcium bicarbonate character prevails, whilst the existence of iron, manganese and nickel is characteristic and attributed to weathering of the lateritic horizons and supplementary to the weathering of ultrabasic blocks. Intensive agriculture that is the dominant activity in the wider region is clearly depicted especially in the vadose zone leachates, in the form of elevated ammonium concentrations that often exceed the maximum admissible concentration for water intended for potable use. In addition, nitrate concentrations in the saturated zone of the sedimentary aquifer system exceed the respective threshold in several cases. 145) ΚΑZAKIS, Ν., FYTILIS, V., VOUDOURIS, Κ. (2015): Soil vulnerability assessment to nitrogen losses using indices: Application in Epanomi region, North Greece. Proc. of 9th Conference of Hellenic Society of Agricultural Engineers, Thessaloniki, 8-9 October 2015, 191-198 (in Greek). The aim of this work is the assessment of intrinsic vulnerability of soil to nitrogen losses in the Epanomi region in North Greece. Therefore, the LOSN-PN and LOSN-RN indices were applied. Sedimentary formations such as sands, gravel and sandstones are the prevalent geological formations of the study area. In the last decades, the nitrate concentrations have been increased in the groundwater (up to 306 mg/L). Agricultural activities are the main source of nitrates in the groundwater of the region. According to the LOSN-PN index nitrogen losses due to deep percolation vary from 8.9 to 28.8 Kg N/ha/yr, whereas the nitrogen losses due to surface run off (LOSN-RN) range between 0.12 to 9.4 Kg N/ha/yr. The deterioration of the high concentrations of nitrates in the studied aquifer demands the decrease of the applied fertilizers in crops or re-planning of the crop types. 146) VOUDOURIS, K., KAZAKIS, N., STRATIS, J. (2015): Groundwater quality in the wider area of Volos city, Greece. AQUA 2015, 42nd Congress of International Association of Hydrogeologists. Rome, Italy, 13-18 September. E-poster and 5 min oral presentation. The aim of this study is the investigation of the groundwater quality in the wider area of Volos, Thessaly, central Greece. Thirty four (34) groundwater samples were collected from boreholes. Conventional methods and multivariate techniques were applied to achieve this goal. The city of Volos is characterized by an increasing trend in water consumption, as a result of urbanization. Groundwater and spring-water from Pilion mountain are the main sources for domestic and irrigation supply in this region. In alluvial sediments the main aquifer of the studied area is developed. Sources of groundwater pollution are the seawater intrusion in coastal aquifers, the fertilizers from agricultural activities, the disposal of untreated waste in torrents and

lithogenic sources (ore mineralizations mainly associated with the ophiolitic unit or subvolcanic intrusions). Based on the results of chemical analyses, pH values are greater than 7, indicating the slightly alkaline character of groundwater. Groundwater electrical conductivity (EC) values range between 525 and 5840 μS/cm. High values of EC are recorded in the eastern coastal part, due to seawater intrusion. Chloride concentration ranges between 15.6 and 715 mg/L. Nitrate concentrations are below the maximum admissible concentration of 50 mg/L, which was set by EU for drinking water, and vary from 5 to 42.6 mg/L. Two main groundwater types are identified: Ca (Mg)-HCO3 (freshwater) and Na-Cl (water affected by seawater intrusion). In general, the concentrations of heavy metals (Cd, Al, Cu, Zn) are low. Total iron concentrations in some samples exceed the upper limit for potable water (200 μg/L). Relatively high arsenic concentrations (≈10 μg/L) are recorded in the upper aquifers and could be associated with geogenic origin, e.g. the presence of ore mineralizations which include As-bearing minerals. Finally, some recommendations are proposed in order to protect the groundwater quality. 147) ΚΑZAKIS, Ν., VOUDOURIS, Κ., KOUMANTAKIS, J. (2015): Groundwater depletion in Anthemountas basin: Mismanagement or climate change? Proc. of 3rd Common Conference of the Hellenic Hydrotechnical Association and Hellenic Committee for Water Resources Management, Athens, 10-12 December, 2015. Vol. Ι, 199-206 (in Greek). The aim of this study is to determine the factors which have contributed to groundwater depletion in the Anthemountas river basin. Groundwater quality data, water level measurements, climatic data, land uses changes and population data were used so as to quantify the changes and specify the extent to which each factor is involved and has led to depletion. Is mismanagement, climate change or both the cause of depletion in the study area? The answer to this is overexploitation due to the mismanagement of the basin’s water resources. On the other hand, climate changes have had a minor impact on this phenomenon. The decline of groundwater was first noted around 1975-1977 and was intensified after 1993 at a rate of more than 1 m per year. To conclude, salinization of the coastal aquifer as well as eradication of the artesian groundwater zones constitute the implications of water level decline. 148) KAZAKIS, N., PAVLOU, A., VARGEMEZIS, G., VOUDOURIS, K., SOULIOS, G., PLIAKAS, F., TSOKAS, G. (2016): Seawater intrusion mapping using electrical resistivity tomographyand hydrochemical data. An application in the coastal area of Eastern Thermaikos Gulf, Greece. Science of the Total Environment 543, 373-387. The aim of this study is to determine the extent and geometrical characteristics of seawater intrusion of the coastal aquifer in Eastern Thermaikos Gulf. Hydrochemical data and geoelectrical measurements were combined and supplemented in order to establish the hydrochemical regime of the study site in regard to seawater phenomena. Therefore, chemical analysis of groundwater was performed in 126 boreholes and fifteen electrical resistivity tomographies (ERT) were measured, whereas in two sites the ERT measurements were repeated after the wet period. Accordingly, a significant part of the coastal aquifer (up to 150 Km2) is influenced by seawater intrusion. The Cl− concentrations are up to 2240 mg/L indicating the seawater intrusion which is also verified by the calculated ionic ratios. The ionic ratios were overlapped and a seawater intrusion map (SWIM) was produced. The areas with the most intensive salinization are located between the areas of N. Kallikratia-Epanomi and Aggelochori-Peraia. According to ERTs in the influenced areas the salinization of the aquifer is over 1 Km toward the mainland and its depth is up to 200 m. In the area surrounding the Macedonia Airport the ERTs have reveal the salinization of the upper aquifer in depths up to 40 m, whereas the underline aquifer is uninfluenced. This abnormal distribution of seawater intrusionindicates the contribution of the geoelectrical methods for the study of seawater intrusion especially in areas with meager hydrochemical data.

149) KAZAKIS, N., VARGEMEZIS, G., VOUDOURIS, K. (2016): Estimation of hydraulic parameters in a complex porous aquifer system using geoelectrical methods. Science of the Total Environment 550, 742-750. Geoelectrical methods have been widely used for the estimation of aquifer hydraulic properties. In this study, geoelectrical methods were applied in a lithologically and hydrochemically complex porous aquifer to estimate its porosity, hydraulic conductivity and transmissivity. For this purpose, the electrical resistivity of the aquifer as well as the electrical conductivity of the groundwater was measured in 37 sites and wells. Initially, the Archie’s law was used to generate sets of cementation factor (m) and alpha (α) parameter from which the mode values of α = 0.98 and m=1.75 are representative of the studied aquifer. The transmissivity of the aquifer varies from 5.1×10-3 to 3.1×10-5 m2/s, whereas the mean value of its porosity is 0.45. The hydraulic conductivity of the aquifer which was calculated according to Archie’s law varies from 2.08×10-6 to 6.84×10-5 m/s and is strongly correlated with the pumping test’s hydraulic conductivity. In contrast, the hydraulic conductivity which was calculated using Dar-Zarrouk parameters presents lower correlation with the pumping test’s hydraulic conductivity. Furthermore, a relation between aquifer resistivity and hydraulic conductivity was established for the studied aquifer to enable the estimation of these parameters in sites lacking data. 150) VENETSANOU, P., KAZAKIS, N., ΑΝAGNOSTOPOULOU, C., VOUDOURIS, K. (2016): Impacts of rainfall changes on groundwater balance of coastal aquifers: A case study of the Thermaikos Gulf, North Greece. Global Nest: The International Journal, Vol. 18 (1), 185-196. Groundwater is one of the major parameters in maintaining ecology in many regions. As climate is one of the main factors which affects groundwater resources, the main objective of the present study is to assess the impact of rainfall changes on the groundwater system by projecting the future changes in the 21st century (2021-2050 and 2071-2100). For this reason, the RegCM3 climate model precipitation data, which showed a reduction in rainfall, was entered in the steady-state groundwater flow model MODFLOW for the case study of a coastal aquifer in the eastern part of the Thermaikos Gulf (North Greece). The uprising urbanization in combination with the intensive cultivation have led to the overexploitation of the coastal aquifer and seawater intrusion. The groundwater flow simulation by using the MODFLOW code indicates a negative water budget and estimates the quantities of the seawater intrusion. According to the RegCM3 climate model, the precipitation reduction is estimated to be 4% during the period of 2021-2050, while the precipitation decrease is expected to be 22% during the period of 2071-2100. Furthermore, the natural recharge of the coastal aquifer is expected to be influenced by the precipitation reduction. Finally, the seawater intrusion amounts are expected to increase during these future periods and more specifically during the second period of 2071-2100. 151) VENETSANOU, P., VOUDOURIS, K., KAZAKIS, N., MATTAS, C. (2016): Impacts of urbanization, agriculture and touristic development on groundwater resources in the eastern part of Thermaikos Gulf (North Greece): An application of DPSIR model for sustainable development. European Water 51, 3-13. Special Issue: Water Resources Management in a Changing World: Challenges and Opportunities (Eds: Loukas, A., Yegen, R. et al.). The eastern part of the Thermaikos Gulf is characterized by urbanization, touristic development and intensive agriculture activities. Water resources are characterized by high water demands for agriculture and tourism during the dry period (May- late September) when water availability is low. The main aquifers are within coarse grained Neogene and Quaternary deposits (porous aquifers). This study deals with the impacts of the aforementioned activities on groundwater resources in this area. Therefore, hydrometeorological, hydrogeological and hydrochemical data were collected, evaluated and compared with previous studies. The water demands for domestic and irrigation use are mainly covered by groundwater abstracted from aquifer systems via numerous boreholes. As a result, a total groundwater level decline of 45 m has been recorded over the last 30 years and a negative water balance has been established in the coastal aquifer

favoring sea water intrusion. Degradation of groundwater quality is mainly caused by seawater intrusion and nitrate pollution. The concentrations of chloride range between 400 mg/L and up to 700 mg/L in areas affected by seawater intrusion. Intensified fertilization has led to nitrate pollution, as shown by the increased nitrate concentration, which locally exceeds the maximum admissible concentration of 50 mg/L set by EU Council for drinking water therefore rendering most groundwater unsuitable for human consumption. Finally, the DPSIR approach (Driver-Pressure-State-Impact-Response) was applied in order to optimize the measures for rational management of water resources and some recommendations were proposed, including the reuse of the treated wastewater for irrigation purposes, the construction of dams for exploitation of surface water, artificial recharge, water efficiency measures and public education. 152) ANGELAKIS, A.N., VOUDOURIS, K., MARIOLAKOS, Ι. (2016): Groundwater utilization through the centuries focusing οn the Hellenic civilizations. Hydrogeology Journal, Vol. 24, 1311-1324. Groundwater has been utilized since the Prehistoric times. Water supply of some Minoan settlements on the eastern side of the island of Crete (Greece) was based on groundwater. Later on, many wells were constructed in several areas of Greece and their use expanded through subsequent periods. The greatest achievement in groundwater exploitation by ancient Greeks was the construction of long underground galleries or qanats, which collected water from springs and alluvial deposits. In Classical times most of the wells were on private properties and their owners were forced by regulations to maintain the wells in good condition and ready for use in wartime. During that period, the first scientific theories of Aristotle and Theophrastus developed about hydrological phenomena, and the processes involved in the formation of surface water and groundwater were clarified. Wells played a major part in urban water supply during the Roman period, in which famous aqueducts were constructed to transfer water. However, several regions of Greece were self-sufficient in water, supplied by many wells from the Prehistoric to the Byzantine period. People understood the local geological conditions and, according to their culture, constructed and managed their own types of wells. In addition to the wells and aqueducts, the hydraulic technology included cisterns to store rain water, and systems to capture spring water for transport by aqueducts. The examples of hydro-technologies and water management practices described in this paper may have some relevance for water engineering even in modern times. 153) STEIAKAKIS, E., VAVADAKIS, D., KRITSOTAKIS, M., VOUDOURIS, K., ANAGNOSTOPOULOU, C. (2016): Drought impacts on the fresh water potential of a karst aquifer in Crete, Greece. Environmental Earth Sciences 75:107, 1-19. Malia’s coastal aquifer supplies water for domestic and irrigation purposes most of northern part of Heraklion prefecture (central Crete). The extensive exploitation of groundwater since the late 1960s has resulted in a continual decline in groundwater level and significant degradation in groundwater quality, due to salinity intrusion in the coastal aquifer. Moreover, the aquifer will likely to experience impacts of climate-driven recharge changes in the coming years, with adverse consequences for water supply in the region. A regional groundwater flow model was developed to simulate the existing hydrogeological system, and to evaluate the effects of combined impacts of groundwater exploitation and climate variability in future. The investigation results suggest that the equivalent porous medium (EPM) approach appears reasonable for the karst aquifers on a regional scale, as it is capable to simulate the groundwater flow and the spreading of chloride concentration with sufficient accuracy. However, locally the transport of saline water may depend primarily on the karst conduit network rather than matrix permeability; therefore the point information must be evaluated and not taken as undisputed. Furthermore, the study provides a valuable guidance on predicting the seawater intrusion in aquifers under similar hydrogeological conditions; and offers a considerable issue in management of the groundwater quality deterioration.

154) KAZAKIS, N., SYRIDES, G., VOUDOURIS, K. (2016): Exploitation of palaeontological and hydrogeological features for geotourism in Mesopotamia-Oinoi, Kastoria, Northen Greece. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 1, 229-237. The aim of this study is to reveal the geological, paleontological and hydrogeological features of the surrounding area of Oinoi in municipality of Kastoria, Northern Greece. These features can attract visitors and develop geotourism in the area. Fossil mollusk shells (Pectinidae family, Pecten and Flabellipecten) were recognized in three fossiliferous sites. Additionally, the palaeontological features are supplemented by impressive alternations of sedimentary strata, cavities, springs, small natural waterfalls and lakes as well as a small dam. Three routes (the longest is 12.3 Km) were defined for the promotion of these features. The routes are suitable for walking, jogging, mountain biking, climbing, for students, elder people and adults. This is a preliminary approach, since further research in the wider area is needed, in order to include more existing natural features, as well as to create a comprehensive management plan and define the criteria for the proposal of the site as a Geopark. 155) TSITROULIS, I., VOUDOURIS, K., VASILEIOU, A., MATTAS, C., SAPOUNTZIS, Μ., MARIS, F. (2016): Flood hazard assessment and delimitation of the likely flood hazard zones of the upper part in Gallikos River Basin. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 2, 995-1004. Floods are one of the most common natural hazards in global range and could threat the human life, health, environment and infrastructure. The aim of this paper is the estimation and the delimitation of the likely flood hazard zones, for different rainfall intensities in the upper part of Gallikos river basin (central Macedonia) according to the European directive 2007/60. For the analysis of the meteorological data and the construction of flood zone maps, HYDROGNOMON, HEC-HMS, HEC-RAS free software packages were used. The thematic maps were constructed with ESRI GIS. The results are depicted in flood inundation maps, delimitating and visualizing the scale of the flood hazard effect in the area. The construction of flood prediction models is a very useful tool towards the direction of the design of an efficient flood management framework. 156) VENETSANOU, P., ΑΝAGNOSTOPOULOU, C., VOUDOURIS, K. (2016): Impacts of climatic changes on hydrologic balance: A case study of Vocha plain, Korinthia. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 2, 1068-1077. The aim of this study is to evaluate climate model hydrological parameters in comparison to recorded hydrological data and estimate the impacts of climate change on water balance. For this purpose, a combination of climate model precipitation and temperature data and Thornthwaite method was applied for the period 1988-2000 and the future periods 2028-2040, 2058-2070 and 2088-2100. The application of this combination was carried out in a coastal region in Southeastern part of Korinthiakos Gulf (southern Greece). The area is suitable for this target, because it is characterized by urbanization, intensive agriculture and tourism development, with increasing water demands. The evaluation of climate model parameters in comparison to observed data shows that the RegCM3 model is a reliable model. According to the future projections and the Thornthwaite method, the real evapotranspiration is estimated to increase, as a result precipitation decrease and temperature increase. 157) KΑZAKIS, N., KANTIRANIS, N., KAPRARA, M., MITRAKAS, M., VARGEMEZIS, G., VOUDOURIS, K., CHATZIPETROS, A., KALAITZIDOU, K. and FILIPPIDIS, A. (2016): Potential Toxic Elements (PTEs) in ground and spring waters, soils and sediments: An interdisciplinary study in Anthemountas basin, N. Greece. Proc. of the 14th International Conference, Thessaloniki, May 2016. Bulletin of the Geological Society of Greece, Vol. L, No 4, 2171-2181. Ground and spring waters, soils and sediments of Anthemountas basin in Northern Greece were

analyzed for Potential Toxic Elements (PTEs). In total, twenty three soil and sediment samples, three groundwater (boreholes) and two spring water samples, were analyzed. Contents of Ni in soils and sediments can be as high as 2169 mg/kg. The high correlation coefficient of Ni and Cr, indicates the geogenic origin of Ni, which originates from ophiolitic rocks. Arsenic concentration ranges from 3 to 110 mg/kg in soils and sediments, with the highest contents observed in travertine. The spring waters are characterized by elevated concentrations of As (up to 235 μg/L), Na, K, Fe and Zn, indicating that hydrothermal fluids are responsible for feldspar alteration of the Monopigado granodiorite. On the contrary, in groundwaters, As contents are low (up to 18 μg/L). Electrical resistivity tomographies performed around the groundwater boreholes, revealed the presence of normal faults, locally allowing the mixing of geothermal fluids with the shallow porous aquifer (SPA). The presence of As in the SPA is probably due to inputs from geothermal waters through normal faulting. 158) VOUDOURIS, K., TSATSANIFOS, C., YANNOPOULOS, S., MARINOS, V., ANGELAKIS, A.N. (2015): Evolution of Underground Aqueducts in Hellenic World. Water Science and Technology: Water Supply 16.5, 1159-1177, IWA Publishing Historical and archaeological evidences show that ancient Hellenes had developed underground aqueducts since the prehistoric times. However, innovative methods of underground aqueducts were developed in Hellas mainly during the Archaic, Classical, Hellenistic, and Roman periods. Since the well known tunnel at the island of Samos, Hellas, was designed and begun its construction (ca. 550 BC) by Eupalinos of Megara (the first civil engineer of history), several underground tunnels (with and without wells-like vertical shafts) were implemented in this country. The goal of Eupalinos tunnel was to transfer water into the town from a spring. This tunnel, representing the peak of ancient hydraulic technology, was dug through limestone by two separate teams advancing in a straight line from both sides of the mountain. Delivering fresh water to growing populations has been an ongoing problem since ancient times. Several underground aqueducts paradigms (e.g. Peisistration in Athens and Polyrrhenia in Crete), some of which are in use even today, are presented and discussed. After late Roman times and the Adrianic aqueduct a gap of about seventeen hundred years in construction of such hydraulic works is noticed. However, a remarkable development of tunneling in Hellas appeared during the last 50 years due to the “cosmogony” of the construction of infrastructure projects using modern technology e.g. Evinos-Mornos aqueduct with 15 tunnels of 71 km total length and the diversion tunnels in Sykia to the Thessaly plain and Messochora of the Acheloos river of 17.5 and 7.5 km length, respectively. Also, very recently three small conventional tunnels and one TBM were constructed in Aposelemis aqueducts used for water supply of Iraklion and Agios Nikolaos cities in Crete. As a consequence, significant design and construction experiences were gained. Overall, it seems that underground aqueducts of modern societies are not very different in principles from those during antiquity. 159) KΑZAKIS, N., KANTIRANIS, N., VOUDOURIS, K., MITRAKAS, M., KAPRARA, M. (2016): Hydrogeological conditions favoring hexavalent chromium occurrence on groundwater in Greece: A synoptic review. Scientific yearbook of Geology Department, Special issue 105, 15-20. This study aiming to present the hydrogeological conditions which favor the occurrence of Hexavalent chromium on groundwater in Greece. The highest concentrations (>40 μg/L) of Hexavalent chromium are occurred on shallow porous aquifers with ophiolitic material. Medium concentrations can be found on fissured rock ophiolitic aquifers (e.g. Euboia island) as well as on fault springs which discharge fissured rock ophiolitic aquifers (e.g. Lesvos island). On karstic aquifer the concentrations of Cr (VI) are below detection limit. The hydrogeological conditions determine the hydrochemical regime of groundwater and consequently determine the concentrations of Hexavalent chromium. However, the majority of the cases, groundwater is studied as a single unit, the aquifers does not discretized and therefore the variations of hexavalent chromium concentrations are insufficiently interpreted.

160) AIDONA, E., GRISON, H., PETROVSKY, KAZAKIS, N., PAPADOPOULOU, L., VOUDOURIS, K. (2016): Magnetic characteristics and trace elements concentration in soils from Anthemountas River basin (North Greece): discrimination of different sources of magnetic enhancement. Environmental Earth Sciences, Vol. 75:1375, 1-16. The magnetic minerals (e.g., iron oxides) that are present in soils can be easily identified by using rock-magnetic techniques. Increased magnetic susceptibility of soils may reflect particles rich in iron oxides of anthropogenic, lithogenic, and pedogenic origin. Therefore, reliable discrimination of these sources is required, especially in areas where neither of them is dominant. The aim of the present study is to assess the lithogenic and anthropogenic contributions to iron-oxide mineralogy of soils in the area of Anthemountas River basin in the southeast part of Thessaloniki city. Previous investigation within the study area, based on spatial distribution of magnetic susceptibility, revealed the presence of two magnetically enhanced regions. Therefore, the present study is focused on these two areas, in order to characterize the origin of magnetic enhancement. Detailed magnetic analyses include properties reflecting the type, concentration, and relative grain-size distribution of magnetic particles. Moreover, trace element concentration is determined with an aim to establish the link between low-field mass-specific magnetic susceptibility and concentration of Fe, Cr, Ni, Mn, Pb, Zn, and Ti. These findings are supported by descriptions of the micro-morphology performed by scanning electron microscopy and determination of elemental composition by EDX analyses in selected points. Finally hierarchical cluster analysis is applied to classify the soil samples into appropriate groups according to their magnetic properties. The results reveal that magnetic measurements provide a useful tool for the discrimination between different magnetic sources responsible for the enhancement of magnetic susceptibility in soils. Low-field mass-specific magnetic susceptibility reflects increased concentration of trace elements, while its combination with other magnetic measurements clearly differentiates the origin of magnetic enhancement in both parts of the study area. 161) VENETSANOU, P., ΑΝAGNOSTOPOULOU, C., VOUDOURIS, K. (2017): Climate projections on estimating water balance in Havrias River Basin, Greece. Proc. of 13th International Conference COMECAP, In “Perspectives on Atmospheric Sciences” (Eds Karacostas, T.S. et al.), Springer, 669-675. Climate change is expected to impose current pressure on water resources. The aim of this study is to estimate the water balance by projecting the future changes in the 21st century. For this reason, climate model hydrological parameters were evaluating using re-analysis precipitation and temperature data. The Representative Concentration Pathways (RCP4.5 and RCP 8.5) were used for the future projections. The proposed research was applied in Havrias river basin in Halkidiki (North Greece). The study area is suitable for this purpose, because it is characterized by increasing water demands due to intensive agriculture and tourism development. Climate model results showed an increase in precipitation, temperature and evapotranspiration. Consequently, the water balance is expected to be influenced by the shifts in climate parameters. 162) VOUDOURIS, K., KAIAFA, A., ZHENG, X.Y., KUMAR, R., ZANIER, K., KOLOKYTHA, E., ANGELAKIS, A. (2017): A brief history of water wells focusing on Balkan, Indian and Chinese civilizations. Proceedings of International Water Association, 2nd Regional Symposium on Water, Wastewater and Environment, 24-26 Μarch, Izmir, Turkey, 465-476. The provision of water has been a major enterprise in human history. Groundwater has been utilized since the Prehistoric times to cover the human needs. Initially, the exploitation of groundwater has been made by shallow wells and later by boreholes. A water well is an excavation in the ground by digging, driving, boring, or drilling to access groundwater in aquifers. Groundwater wells were used in Helladic world since Neolithic times. Ancient Chinese also developed a drilling tool for water wells which, in principle, is similar to modern machines. Moreover, the Indus valley civilization had well-constructed wells mainly for drinking purposes.

The construction of wells varied according to local conditions, determined by geology, hydrogeology, morphology, as well as to the local tradition. Furthermore, a well was not just a water source but also became a cultural symbol on the history, related to local religion and custom. For example, the stepwells in India became not only sources of drinking water, but cool sanctuaries for bathing, prayer, and meditation. In the present review the evolution of wells through the centuries is examined. The examples of water wells technologies demonstrate that the ancient people had an outstanding engineering knowledge of water supply, which is interesting for water engineering and hydrogeologists even nowadays. 163) KAZAKIS, N., MATTAS, C., PAVLOU, A., PATRIKAKI, O., VOUDOURIS, K. (2017): Multivariate statistical analysis for the assessment of groundwater quality under different hydrogeological regimes. Environmental Earth Sciences, Vol. 76:349, 1-13. Multivariate statistical analysis has been widely used for hydrogeochemical characterization of groundwater quality. In this study, hydrochemical data from three hydrological basins was used and two methods (factor and cluster analysis) were applied. The first area is the coastal area of Eastern Thermaikos Gulf where groundwater is influenced by seawater intrusion and geothermal fluids. The other two areas are the inland basins of Gallikos and Perdikas in which agricultural and industrial activities constitute the main pollution sources of groundwater. Initially, the aforementioned methods were applied for each area separately and resulted in a different number of significant factors and clusters, whilst the natural and anthropogenic influences were spatially determined in each area. Additionally, factor and cluster analysis were applied coupling data from all areas. Therefore, five clusters and 3 major factors were determined distinguishing the hydrochemical processes and impacts from anthropogenic activities in more detail. Salinization dominates in the coastal area, while in Gallikos and Perdikas basin high concentrations of NO3 occur mainly due to agricultural activities and small livestock units. The numerous hydrochemical samples are identified as the main issue for the higher discretization and reliability of the second approach. Nevertheless, this study is associated with a number of limitations of multivariable statistical analysis regarding extreme concentrations of Cl and Na in the coastal area. This stimulates further research in overcoming and understanding these drawbacks. 164) ZAVRIDOU, E., KOUMANTAKIS, I., KAZAKIS, N., VASILIOY E., MARKANTONIS, K., VOUDOURIS, K. (2017): Hydrogeological-hydrochemical regime of the coastal lowland, North of Olymbus. Proc. of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 1, 159-168 (in Greek). The aim of this study is to determine the hydrogeological regime in the northern part of the coastal lowland area of Mount Olympus. A further goal is to establish the current hydrodynamic and hydrochemical status of this area, which covers 90 Km2. The study area is administratively subject to the municipality of Dion–Olympus. For the investigation of the hydrological conditions in the study area was performed a literature review and data collection (hydrological, hydrogeological and geological data). Subsequently fieldwork carried out for data collection and measurements. A groundwater sampling was conducted from 17 boreholes during the period of September 2014 and 27 samples were collected during April 2015. Moreover, in-situ measurements of basic parameters, such as pH, electrical conductivity (EC) and temperature took place. In addition, the groundwater level was measured in 19 boreholes during October 2014 and in 17 boreholes during April 2015. Groundwater is of excellent quality and hence it is suitable even for drinking and domestic use. The main characteristic of this site is the occurrence of an artesian zone, 4.5 Km in width, indicating the high potentiality of the aquifer system. 165) MANOUTSOGLOU, E., KRITSOTAKIS, M., VOUDOURIS, K., STEIAKAKIS, E. (2017): Preliminary geothermal investigation for the localization of low enthalpy geothermal fields in Messara, Crete. Proc. of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 1, 243-254 (in Greek).

The past few years, great efforts have been made in Greece for the detection, recording and partly for the development of geothermal potential. Apart from some indications in eastern and western Crete, irrigation wells drilled in Messara valley-central Crete give increased temperature water. More specifically, the water temperature of irrigation wells - located at Villages of Peri, Platanos and Melidochori- that was monitored during the wet and dry periods (2015-2016) indicates the existence of potential geothermal fields in the area. Geological evidences are utilized to support the existence of low enthalpy reservoirs hosted in the Alpine formations and more possible within the carbonate formations of Tripolis zone. A possible explanation for the increased water temperature is that the mean heat flux-calculated at 60 mW/m2 in the region of Messara - increases along major fault zones within which circulates the water. These major fault zones are active since Middle Miocene and were repeatedly reactivated. The increase in thermal flux in these major fault zones could be associated with an increased geothermal gradient. 166) ΜΑΤΤΑS, C., VERANIS, Ν., ΚΑΚLIS, Τ., VOUDOURIS, Κ., SOULIOS, G. (2017): Groundwater level fluctuation of the alluvial aquifer in Almopia basin (Macedonia) correlated with groundwater abstractions. Proc. of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 1, 291-298 (in Greek). The basin of Almopia occupies 945 Km2, 340 Km2 of which regard the central alluvial system. The main geological formations belong to the subzones of Almopia and Paiko and to the Pelagonian zone. Approximately 300 boreholes have been drilled inside the alluvial aquifer. The latter is directly recharged from rainfall infiltration by 25×106 m3 - 31×106 m3, whereas the recharge by the riverbed infiltration is about 10×106 m3. The total recharge ranges from 35×106 m3 to 41×106 m3. In addition, there is significant lateral recharge from the adjacent karstic aquifers. It has been calculated that the annual groundwater abstractions for irrigation are roughly 62×106 m3. The monitoring of the groundwater level, which was conducted by I.G.M.E. during the periods 1984-1990 and 2004-2007, showed that the average annual drawdown is approximately 16 cm. However, during the most recent years, a stabilizing trend, or even recovery, has been observed. 167) KΙRI, E., RECI, H., PANAGOPOULOS, A., COMO, E., VOUDOURIS, K. (2017): Hydrogeological study using geophysical methods in a karstic area: A case from Tushemisht and Gurras Villages, SE Albania. Proc. of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 2, 283-290. This work deals with the study of karstic waterways towards the surface springs of Tushemisht and Gurras villages, using a geophysical tool ERT (Electrical Resistance Tomography). The main goal was to examine whether the karst developed in the area serves as infiltration zone of Prespa’s Lake waters or infiltration zone of precipitation. The area where this study took place is in the up hills of the Tushemisht and Gurras springs composed of limestone, where karst is well developed. The studied area is a karstic domain, and what was deemed of high essence was to study the system’s behavior during the whole year from a hydrogeologic point of view. Electrical resistivity of subsurface is monitored in two periods, dry and wet seasons respectively having as a scope to see if there is any change of resistivity distribution of subsurface. In the Gurras and Tushemisht villages groundwater emerges in karstic springs. In the wider area groundwater from the karstic system also recharges the southeastern part of Ohrid Lake, which receives 1/3 of its resources from Prespa Lake. Using the geophysical study on three profiles we attempted to understand the behavior of the karstic system during the wet and dry periods of the year. From subsurface distribution of resistivity values on both periods we didn’t see any significant change on the ERT profiles. Zones of low resistivity values are distributed at the same zones on both periods of the year, which suggests that even during the dry period the karstic system in the region is full of water. We conclude that most of the water coming from those karst areas is from the Prespa Lake.

168) KIRI, E., VOUDOURIS, K., RECI, H., PANAGOPOULOS, A., COMO, E., VENETSANOU, P. (2017): Hydrodynamics’ study of the Ohrid-Prespa Lakes using Stiff diagrams. Proceedings of the 11th International Hydrogeological Conference, 4-6 October 2017, Athens, Vol. 2, 291-300. This study deals with hydrochemical analyses of Prespa and Ohrid Lakes in order to evaluate the water dynamics between two lakes. The Stiff diagram has been used as the most suitable one for analysis of variation of the water quality and chemistry in time, based on the presence of water chemical compounds. The graphical representation helps to make water comparison in order to establish the feeding zone of the lakes and rivers. Stiff diagrams have been used in this work because they are appropriate in comparing the chemical constituents of waters. What one can aim to achieve by analysing the water chemistry is, amongst others, to find a possible similarity between the water in Prespa Lake and Ohrid Lake. Data obtained from the Hydro-Meteorology Institute and recent field work is used to build the necessary database for the AquaChem program. The purpose of this analysis is to notice whether or not there are changes in the natural equilibrium that used to exist between these two lakes. Given the continued decline of water level in the Prespa Lake, it is necessary to carry out any possible research in many scientific fields that can help achieve a concrete conclusion related to this negative phenomenon. If the two regions were considered as one, it would be a more complete study. In hydrogeological terms, the link that exists between these two lakes is big and very important. Thanks to the geographical conditions in which these two lakes are positioned, Prespa Lake is a good and constant feeding source for Ohrid Lake throughout the year. This study shows that in certain pockets in the depths of Ohrid Lake there are similarities in water chemistry to that of Prespa Lake. Also to be considered are the comparisons between samples of water chemistry taken out of lakes surfaces. 169) BUSICO, G., KAZAKIS, N., COLOMBANI, N., MASTROCICCO, M., VOUDOURIS, K., TEDESCO, D. (2017): A modified SINTACS method for groundwater vulnerability and pollution risk assessment in highly anthropized regions based on NO3

- and SO42-

concentrations. Science of the Total Environment 609, 1512-1523. Groundwater vulnerability and risk assessment are worldwide tools in supporting groundwater protection and land planning. In this study, we used three of these different methodologies applied to the Campanian Plain located in southern Italy: SINTACS, AVI and LOS. However, their capability to describe the observed chemical pollution of the area has resulted quite poor. For such a reason, a modified SINTACS method has been then implemented in the area in order to get a more reliable view of groundwater vulnerability. NO3

- and SO42- from more than 400

monitoring wells were used for specific vulnerability assessment. Land use was chosen as key parameter to infer the risk of groundwater pollution in our area. The new methodology seems to show a higher correlation with observed NO3

-concentrations and a more reliable identification of aquifer’s pollution hot spots. The main sources of NO3

-were found in sub-urban areas, where vulnerability and risk are higher than in other areas. Otherwise due to reducing conditions triggered by the presence of elevated sedimentary organic matter and peat, concentrations below agricultural areas were lower than in sub-urban areas. The SO4

2- specific vulnerability map showed a positive correlation with observed concentrations, due to geogenic and anthropogenic SO4

2- sources present in the area. The combination of both NO3- and SO4

2- derived risk maps becomes essential to improve the conceptual model of aquifer pollution in this severely anthropized area. The application of this new and original approach shed light on the strengths and weaknesses of each of the described previous methods and clearly showed how anthropogenic activities have to be taken into account in the assessment process. 170) VOUDOURIS, Κ., ΚAZAKIS, Ν., ΚRAKA, Κ. (2017): Site selection of Green Points using GIS. Proc. of 5th International Conference of Hellenic Solid Waste Management Association, 14-15 December, Athens (in Greek). Green points are areas specially designed, fenced and guarded in order to facilitate the access of

residents to certain categories of materials (paper, glass, plastic, etc). In this paper a method of selecting appropriate locations for green points by applying exclusion criteria to a Geographic Information System (GIS) is proposed. Initially, a suitable database (including road network, hydrographic network, residential areas, etc.) was created, and the thematic levels were then created and introduced into the green points selecting model. The method for green points selection in urban areas was implemented in the Municipality of Kalamaria, Prefecture of Thessaloniki. 171) BUSICO, G., CUOCO, E., KAZAKIS, N., COLOMBANI, N., MASTROCICCO, M., TEDESCO, D., VOUDOURIS, K. (2018): Multivariate statistical analysis to characterize/discriminate between anthropogenic and geogenic trace element occurrence in the Campania Plain, Southern Italy. Environmental Pollution 234, 260-269. Shallow aquifers are the most accessible reservoirs of potable groundwater; nevertheless, they are also prone to various sources of pollution and it is usually difficult to distinguish between human and natural sources at the watershed scale. The area chosen for this study (the Campania Plain) is characterized by high spatial heterogeneities both in geochemical features and in hydraulic properties. Groundwater mineralization is driven by many processes such as, geothermal activity, weathering of volcanic products and intense human activities. In such a landscape, multivariate statistical analysis has been used to differentiate among the main hydrochemical processes occurring in the area, using three different approaches of factor analysis: (i) major elements, (ii) trace elements, (iii) both major and trace elements. The elaboration of the factor analysis approaches has revealed seven distinct hydrogeochemical processes: i) Salinization (Cl-, Na+); ii) Carbonate rocks dissolution; iii) Anthropogenic inputs (NO3

-, SO42-, U, V); iv) Reducing conditions (Fe2+, Mn2+); v) Heavy metals contamination (Cr

and Ni); vi) Geothermal fluids influence (Li+); and vii) Volcanic products contribution (As, Rb). Results from this study highlight the need to separately apply factor analysis when a large data set of trace elements is available. In fact, the impact of geothermal fluids in the shallow aquifer was identified from the application of the factor analysis using only trace elements. This study also reveals that the factor analysis of major and trace elements can differentiate between anthropogenic and geogenic sources of pollution in intensively exploited aquifers. 172) KAZAKIS, N., SPILIOTIS, M., VOUDOURIS, K., PLIAKAS, F-K., PAPADOPOULOS, B. (2018): A Fuzzy Multicriteria Categorization of the GALDIT method to assess seawater intrusion vulnerability of coastal aquifers. Science of the Total Environment 621, 524-534. Groundwater constitutes the primary source of fresh water for more than 1.2 billion people living in coastal zones. However, the threat of seawater intrusion is widespread in coastal aquifers mainly due to overexploitation of groundwater. In the present study, a modified fuzzy multicriteria categorization into non-ordered categories method was developed in order to modify the standard GALDIT method and assess seawater intrusion vulnerability in a coastal aquifer of northern Greece. The method is based on six parameters: groundwater occurrence, aquifer hydraulic conductivity, groundwater level, distance from the shore, impact of the existing status of seawater intrusion, and aquifer thickness. Initially, the original method was applied and revealed a zone of high vulnerability running parallel to the coastline and covering an area of 8.6 Km2. The modified GALDIT-F method achieved higher discretization of vulnerability zones which is essential to build a rational management plan to prevent seawater intrusion. The GALDIT-F approach also distinguished an area of the aquifer that is influenced by geothermal fluids. In total, twenty-five categories were produced corresponding to different vulnerability degrees according to the initial method (High, Moderate, Low) as well as the area influenced by geothermal fluids. Finally, a road map was developed in order to adapt management strategies to GALDIT-F categories and prevent and mitigate seawater intrusion. The proposed management strategies of the coastal aquifer include managed aquifer recharge (MAR) implementation, reallocation of existing wells, optimization of pumping rates during the hydrological year, and a detailed monitoring plan.

173) PATRIKAKI, O., KAZAKIS, N., KOUGIAS, I., PATSIALIS, Th., THEODOSSIOU, N., VOUDOURIS, K. (2018): Assessing flood hazard at river basin scale with an index-based approach: The case of Mouriki, Greece. Geosciences 8 (50), 1-13. Defining flood-prone areas is particularly important for policy makers, in order to design mitigation strategies and implement flood risk management planning. The present research applies a multicriteria index method to assess flood hazard areas at a river basin scale, in a geographic information system (GIS) environment. The developed methodology has been applied for an area in northeastern Greece, by processing information of seven parameters: flow accumulation, distance from the drainage network, elevation, land use, rainfall intensity and geology. The method assigns a relative importance to each of the parameters for the occurrence and magnitude of flooding, and the relevant weight values are defined through an “analytical hierarchy process”. Subsequently, and according to the relative importance of each index, the spatial information is superimposed, resulting in a flood hazard map of the studied region, an area in northern Greece. The obtained results indicate flood-prone zones, with a very high flood hazard mainly occurring at the lowlands in the vicinity of the drainage network. The provided flood hazard map supports planning activities and mitigation plans that are crucial to protect both the agricultural activities and existing infrastructure from future flood events. 174) ΝΤONA, Μ., GAVRIILIDOU, Ε., ΚΑZAKIS, Ν., VOUDOURIS, Κ. (2018): Investigation of the quantitative and qualitative status of coastal aquifer in Kalikratia-Flogita, Chalkidiki, Greece. Hydrotechnika 27, 54-67 (in Greek). The aim of this study was the determination of quantitative and qualitative status of the coastal aquifer in Kallikratia-Flogita area (Chalkidiki, North Greece). Hence, the hydrochemical data, water level measurements and climatic data were elaborated and evaluated. Groundwater decline occur with a mean rate up to 0.76 m/year which has led to salinization of the aquifer due to seawater intrusion and mixing of geothermal fluids with the upper fresh aquifers. Nitrate pollution is a further stressor that is attributed to fertilizers. Mismanagement of groundwater is the dominant cause of groundwater deterioration, while the referred climate changes follows. Quantification of the two stressors requires further and deeper analysis. 175) VOUDOURIS, K., MANDRALI, P., KAZAKIS, N. (2018): Preventing groundwater pollution using vulnerability and risk mapping: The case of the Florina basin, NW Greece. Geosciences 8 (129), 1-13. The alluvial aquifer system of the Florina basin (320 km2) in North Greece is a representative area where irrigated agriculture is applied. Groundwater is the main source of water. The highest and mean nitrate concentrations in groundwater are 67.9 mg/L and 25 mg/L, respectively. High values could be associated with the use of nitrogen fertilizers from agricultural activities. This study deals with the evaluation of the groundwater quality. For this reason, hydrochemical analyses from 29 groundwater samples and water level measurements were performed for the wet and dry periods of 2016. The suitability of groundwater quality for irrigation purposes is examined by using different indices (Chlorinity Index, SAR, Sodium Percentage, Potential Salinity and Kelly’s index). In addition, the DRASTIC method was modified by using statistical methods, land use map and nitrate concentrations and applied in order to assess the groundwater vulnerability to external pollution. Notably, there was no correlation between the standard DRASTIC method and nitrate concentrations. However, the modified version and the obtained risk map showed high correlation with nitrate concentrations (ρ = 0.55) and the Groundwater Quality; hence, it is suggested as the base for a protection plan of the alluvial aquifer. 176) TIZRO, T.A., VOUDOURIS, K., MATTAS, C., KAMALI, M., RABANIFAR, M. (2018): Evaluation of irrigation efficiency effect on groundwater level variation by MODFLOW and WEAP models: A case study from Tuyserkan Plain, Hamedan, Iran. In “Sustainable

Agriculture and Food Security”, 121-141 (Eds: Mattas, K., Baourakis, G., Zopounidis, C.), Springer. The Zarin Abad plain is located in Zanjan province in the western part of Iran. In this study, spatial analysis was used to interpret some of the chemical parameters of groundwater samples collected from the unconfined aquifer. For this reason, groundwater samples (61) were collected from groundwater monitoring wells to investigate the characteristics of groundwater quality. Maps showing the geographical distribution of hydrochemical parameters were prepared and the impact of various geological formations on the groundwater quality in the region is considered. High values of EC value in the western parts of the plain could be associated with the lithological formations composed of marls and evaporates. Based on SAR values, it is concluded that the majority of groundwater samples is relatively suitable for irrigation use. Analysis of the spatial coherence of the variables from each other was performed using selected models and the Kriging, Co-Kriging and Inverse Weighted Distance (IWD) methods were ultimately used to decipher the spatial variation of the parameters. The results obtained through these methods were compared by root-mean-square error (RMSE) and mean absolute error (MAE). It was found that the Co-Kriging model is the most optimal technique, for studying the spatial distribution in groundwater quality parameters.

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