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1285m
L. Chamo
L. Abaya
Zefne
Dila
Wacha
LaskaSawla
Birbir
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ArbaMinch
Chelelektu
GereseTore
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Zada
Dara
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Weyto River
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Gelan
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Besa
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Bele Sayado
Kebeda
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25.4
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WuloKode
MelaNehaBelta
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Myzelo
Morka
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38°0'0"E
38°0'0"E
37°0'0"E
37°0'0"E
6°0'0"
N
6°0'0"
N
40
40
50
50
60
60
70
70
80
80
90
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10
10
20
20
30
30
40
40
50
50
60
60
70
70
80
80
90
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10
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20
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80 80
90 90
00 00
10 10
20 20
30 30
40 40
50 50
60 60
70 70
80 80
90 90
00 00
10 10
240
240000m.E
250
250
260
260
270
270
280
280
290
290
300
300
310
310
320
320
330
330
340
340
350
350
360
360
370
370
380
380
390
390
400
400
410
410
420
420
5 8000
0m. N
580
590 590
600 600
610 610
620 620
630 630
640 640
650 650
660 660
670 670
680 680
690 690
700 700
710 710SODO - AWASA
HOSAINA-ASELA
KONSO - YABELO
ARBA MINCH - AGRE MARRYAM
DILADIME
BAKO
JIMMA
ARJO
YABELO
HOSAINA ASELA
NEGELEAHEREMARIAM
WACHILE
NAZRET
ISTIFANOS HAYK
AKAKI BESEKA
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Belta Genta
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KongaGerseLante
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Sezega
Gelela
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Wajifo Bedesa
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Kofele
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KenchoMetsir
Dimele
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GelaboAlduba
Didiga
Doketu
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Dumerso
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Gulta Yarte
Adis Ketema
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Chorso Golja
Gato Fuchicha
Birbir MariyamZada
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Tore
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Dila
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Chencha
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Selam Ber
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Agere Mariyam
L. Abaya
L. Chamo
300000
300000
400000
400000
6000
00
6000
00
7000
00
7000
00
AQUIFER SURFACE CONTOUR
INDEX MAP
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1700 1800 190
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1000
700
2100
2000
1300
2200
600
1600
2300
1500
1400
2400
2600
2400
2 000
1500
1300
1400
2100
1100
1300
2000
1600
1600
1200
1400
2400
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Dido
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Mora
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Kako
Gato
MorkaBelta
GeltaBulkiLaskaDonki
Otolo Gayle
Belta Genta
Toylo
Holjo
AdameShara
KongaGerseLante
GerdaTolta
ZombaShele
Gedeo
DerbaZeyse
Kaysa
Gembo
FashaKolme
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Sezega
Gelela
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Andida
Kofele
KedidaWidese
SigigaKenchoMetsir
Dimele
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GelaboAlduba
Didiga
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Dumerso
Wachile
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GetamirCh'ep'o
Aykamir
Arkesha
MashileSek'ama
Delbena
Mecheke
Chileshe
Boshkoro
Mela Neha
Wulo Kode
Wib Hamer
Adis Kofe
Zaba No.2
Bonke BezaYetnebersh
Zala Debech
Gulta Yarte
Hamus Gebeya
Chorso Golja
Gato Fuchicha
Birbir MariyamZada
Kele
Tore
Beto
Bule
Dila
Kemba
Laska
Wacha
Zefne
Dimeka
Kebado
Soyema
Gidole
Gerese
Chencha
Guanguwa
Key Afer
Selam Ber
ChelelektuArba Minch
Agere Mariyam
300000
300000
400000
400000
6000
00
6000
00
7000
00
7000
00
HYDROGEOLOGICAL MAP OF ARBA MINCH - AGRE MARRYAM AREA
0 20 4010km
The topographical map is based on Ethiopian Mapping Agency (EMA), 1979, 1994, 1995 and 1997Geological Map of the Ethiopian Rift,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1981Hydrogeology of the Lakes Region, Ethiopia (Lakes Ziway, Langano, Abiyata, Shalla and Awassa),Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1982Geological Map of Omo River Project area,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1983Geothermal Exploration Project Ethiopian Lakes District Rift, exploitation of Langano-Aluto geothermal resources, Feasibility report,Ministry of Mines and Energy, elc electroconsult, Italy,1986Geology of Agere Maryam Area,Geological Survey of Ethiopia (GSE),1994Hydrogeological, geophysical and engineering Geological Investigation of Yabelo Sheet,Geological Survey of Ethiopia (GSE),2000Hydrogeological and Engineering Geological Investigation of Chew Bahir Sheet,Geological Survey of Ethiopia (GSE),2000Geological Map of the Ziway - Shala Lakes Basin,Dainelli et al., Department of Earth Sciences, University of Florence, Italy,2001Geothermal resource Exploration in Abaya and Tulu Moye Gedemisa geothermal Prospects, Main Ethiopian Rift,Geological Survey of Ethiopia (GSE),2002Hydrogeology and Engineering Geology of Awassa Lake Cachement,Geological Survey of Ethiopia (GSE),2003Geology Yabelo MapSheet,Geological Survey of Ethiopia (GSE),2007Butajira-Ziway Area Development Study Project, Hydrogical Map,Ministry of Water Resources, Ethiopian Water Technology Center (EWTEC),2008Geological map of Rift Valley Lakes Basin,Ministry of Water Resources, Halcrow and GIRDC,2008
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GelaboAlduba
Didiga
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GetamirCh'ep'o
Aykamir
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MashileSek'ama
Delbena
Mecheke
Chileshe
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Bekawile
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Wulo Kode
Wib Hamer
Adis Kofe
Zaba No.2
Jeba Sire
Bonke BezaYetnebersh
Zala Debech
Gulta Yarte
Teferi Kela
Adis Ketema
Hamus Gebeya
Chorso Golja
Gato Fuchicha
Birbir Mariyam
L. Abaya
L. Chamo
Zada
Kele
Tore
Beto
Bule
Dila
Kemba
Laska
Wacha
Zefne
Dimeka
Soyema
Gidole
Gerese
Chencha
Guanguwa
Key Afer
Selam Ber
ChelelektuArba Minch
Agere Mariyam
300000
300000
400000
400000
6000
00
6000
00
7000
00
7000
00
THE STUDY ON GROUNDWATER RESOURCES ASSESSMENT IN THE RIFT VALLEY LAKES BASINJAPAN INTERNATIONAL COOPERATION AGENCY (JICA)
Hydrogeological Map March 2012
FLUORIDE CONCENTRATION MAP
GEOLOGICAL MAP
SCALE 1:250,000 TRANSVERSE MERCATER PROJECTIONSCALE 1:1,000,000
SCALE 1:1,000,000
SCALE 1:1,000,000 0 20 4010 km
0 20 4010 km
0 20 4010 km
1Description
2
5
4
No.
Extensive aquifers with fracture and/or karstic permeability
Consolidated sediments and metamorphosed carbonate; Limestone, sandstone, shale, marl, evaporate marble
Localized aquifers with fracture and intergranular permeabilityMain geothermal areas Common occurrence of
thermal groundwater in fractured volcanic rocks and subordinate unconsolidated sediments
Volcanic rocks, basalts, rhyolites, trachytes, ignimbrites
A
ABC
High, moderate, low (A, B, C)(Note: Not applicable in this map)
ModerateLow
Moderate or high productivity (A,B)(Note: Not applicable in this map)
HighModerate
LowPoor
LowNon carbonate metamorphic rocks, granitic intrusives,dolerites
CB
HighUnconsolidated sediments, alluvium, elluvium, colluvium, lacstrine sediments, poorly cemented sandstone
Extensive aquifer with intergranular permeability
Productivity ClassesLithology
CD
Extensive aquifers with fracture permeability
3
VERTICAL SCALE = 10 x HORIZONTALSCALEN
J K
N'
K'J'
Upper Aquifer Surface Contour 100m interval 1000m interval
K e n y aK e n y a
600
500
2,400
2,300
2,200
2,100
2,000
1,900
1,800
1,700
1,600
1,500
1,400
1,300
1,200
1,100
1,000
900
800
700
100,00090,00080,00070,00060,00050,00040,00030,00020,00010,0000 2000,000190,000180,00017 0,00016 0,000150,000140,000130,000120,000110,000 3000,000290,000280,00027 0,00026 0,000250,000240,000230,000220,000210,000 380,000 390,00037 0,00036 0,000350,000340,000330,000320,000310,000
BH4ABBH10
BH9N
Tiliku Dedaba R. Laftu R. Melka Oda R. Denbi R. Tikur Wiha R. Gidabo R. Kola R. Gigesa R. Dara R. Sala R.
Burka R. Burka R.Arsi Negele Shashemene Awasa Leku Dila Guanguwa Chelelektu Tore Agere Mariyam
Langano Lake
Lake
CBH9N
DBH3
E IJYir-Ch-2
KAg-Ma-2
LT10-2Konga R.
Yirga Chefe
rht
Pm
tbW
Gba N2b
rhtrht
N2b
N2b
WY
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tbtb
rhlac2 lac2 lac2Al
rh
rh
Y W W GG
W
rhba
PgsNgm
Pgl
Pgs
PgsPgs
Pgl
Pgl
Pre
Pgs
Q Q Q Pre
Pgl
Pre
Q
QNgm
Ngm
N1-2n
batbG
ba ba
baob
lac1
N1_2n
N1_2nN1_2n
N1_2n
Pm
QVolob
W GAl
600
500
2,400
2,300
2,200
2,100
2,000
1,900
1,800
1,700
1,600
1,500
1,400
1,300
1,200
1,100
1,000
900
800
700
2,900
2,800
2,700
2,600
2,500
2,400
2,300
2,200
2,100
2,000
1,900
1,800
1,700
1,600
1,500
1,400
1,300
1,200
1,100
1,000
900
800
MBH7
INYir-Ch-2
Kulfo R. Gina R. Gelana R.
Abaya Lake
Arba Minch
Yirga Chefe
baPgs
Pgs
PglPgl
Pgl
PglPgl Pgl
Pgl
PglPglPgl
Pgl
Pgs
PgsPgs
Ngm
Pre
Ngm Ngm
baPgs
Pgs
PglPgl
Pgl
PglPgl Pgl
Pgl
PglPglPgl
Pgl
Pgs
PgsPgs
Ngm
Pre
Ngm Ngm
NgsQ
2,700
2,600
2,500
2,400
2,300
2,200
2,100
2,000
1,900
1,800
1,700
1,600
1,500
1,400
1,300
1,200
1,100
1,000
900
800
MBH8
Segen R.
NAg-Ma-2
Segen R.Q
QPglPgl
PglPgl
Pgl
Pgl
Pgl
Pgl Pgl
Pre PreQ
Q Q
Q
Ngu
Fluoride [mg/l] 0.0 - 1.5 1.5 - 3.0 3.0 - 10.0 10.0 -
Al
Q
lac2
Pm
Vol
rb
lac1
Holocene
Pleistocene Y
ob
W
G
tb
ba
lake
Plio-Pleistocene
N2b
NQs
Miocene
rht
N1_2n
N1n
N1ar
Ngs
Ngu
Ngb
Ngm Eocene-Oligocene Pgs
Pgl MESOZOIC
Pre PRECAMBRIAN
Pliocene
Geology
Mes
rh
A
Borehole (Well)Total depth [mbgl]
Static water level [m]Draw down [m]
Specific capacity [l/min/m]
!@ JICA Well
RoadsAsphaltGravel
Towns!. Region Capital!. Zone Capital
Geological StructureMajor fault, downthrown shownMajor faultNormal fault, downthrow shownNormal faultInferred fault, downthrown shownInferred faultMajor fault, downthrown shown, by satellite imagesMajor fault, by satellite imagesNormal fault, downthrow shown, by satellite imagesNormal fault, by satellite imagesInferred fault, downthrown shown, by satellite imagesInferred fault, by satellite imagesGeology boundaryInferred geology boundary
#* Volcano / Volcanic Cone
RiversMajor Rivers
LakesSwampLake
Basin Boundary
Spring Discharge [l/s]0.01 - 0.750.75 - 2.502.50 - 6.006.00 - 16.00
Caldera edge
!( Developed Area
Boundaries
National Boundary
TEM_̂
Survey Point of Transient-phenomenon (or Time-domain) Electromagnetic Exploration Method
16.00 -
!. Woreda Capital
Biotite Gneiss, Granite, Biotite MetagraniteBiotite Gneiss, Pegmatite;
Sandstone, Shale and LimestoneAdigrat Sandstone, Antaro Limestone;
Porphyritic basalt lavasLower Basalt; Densely-welded rhyolitic welded tuffShole Welded Tuff;
Porphyritic basalt lavasMiddle Basalt; Lapilli tuff with minor laminated tuffBeyana Tuff; Porous basalt lavasUpper Basalt;
Rhyolite piles and necksSharenga Rhyolite;
RhyoliteN1ar Rhyolite;
Anchar BasaltN1n Basalt;
Plagiocrase rhyolitic tuff, pumice tuff and crystal tuffN1_2n Rhyolitic Tuff;
Plagiocrase rhyolite tuff and rhyolite lava flows containing obsidianN1_2n Rhyolitic Volcanics;
Rhyolitic tuffsNQs Rhyolite;Basalt lavas and basaltic pyroclasticsN2b Basalt;
Rhyolite lava flows and rhyolitic tuffsGademotta Rhyolite;
Lake deposits such as sand stone and alternate layerLekansho Lacustrine Deposits;
Massive basalt lavasOgolche Pleistocene Basalt;
Basaltic tuff breccias and lapilli tuffsAdami Tulu Basaltic Pyroclastics; Rhyolitic to andestic welded tuffGonde Strongly Green Welded Tuff; Rhyolitic tuffs and pumice tuffsKetar River Acidic Volcanic Sedimentary Rocks;
Rhyolitic to andestic welded tuffKulumusa Highly Welded Tuff; Yellowish white rhyolitic pumice tuffLangano Poorly Welded Pumiceous Pyroclastics;
Lake deposits such as poorly-sorted gravel, sand, pumice, tuff, and volcanic sandMeki Lacustrine Deposits;
Basalt lavas and reddish brown basaltic scoriaButajira Recent Basalt; Rhyolite lava flows and Obsidian lava flowsCorbetti Rhyolitic Volcanics; Pumice falls and pumice flow depositsCorbetti Pumice Flow & Fall Deposits; Lake deposits such as gravel, sand and mudBulbla Lacstrine Deposits;
Sandy gravel-mudUnclassified Fluvial Deposits;
Fine sand - mudAlluvium;
Geology Al Q
lac2 Pm Vol rb
lac1
Y ob W G tb ba
lake
Alluvium; Fine sand - mud Unclassified Fluvial Deposits; Sandy gravel-mud Bulbla Lacstrine Deposits; Lake deposits such as gravel, sand and mud Corbetti Pumice Flow & Fall Deposits; Pumice falls and pumice flow deposits Corbetti Rhyolitic Volcanics; Rhyolite lava flows and Obsidian lava flows Butajira Recent Basalt; Basalt lavas and reddish brown basaltic scoria Meki Lacustrine Deposits; Lake deposits such as poorly-sorted gravel, sand, pumice, tuff, and volcanic sand
Langano Poorly Welded Pumiceous Pyroclastics; Yellowish white rhyolitic pumice tuff Kulumusa Highly Welded Tuff; Rhyolitic to andestic welded tuff Ketar River Acidic Volcanic Sedimentary Rocks; Rhyolitic tuffs and pumice tuffs Gonde Strongly Green Welded Tuff; Rhyolitic to andestic welded tuff Adami Tulu Basaltic Pyroclastics; Basaltic tuff breccias and lapilli tuffs Ogolche Pleistocene Basalt; Massive basalt lavas Lekansho Lacustrine Deposits; Lake deposits such as sand stone and alternate layer
Holocene
Pleistocene
rh
N2b NQs
rht N1_2n N1n N1ar
Ngs Ngu Ngb Ngm
Pgs Pgl
Mes
Pre
Gademotta Rhyolite; Rhyolite lava flows and rhyolitic tuffs N2b Basalt; Basalt lavas and basaltic pyroclastics NQs Rhyolite; Rhyolitic tuffs
N1_2n Rhyolitic Volcanics; Plagiocrase rhyolite tuff and rhyolite lava flows containing obsidian N1_2n Rhyolitic Tuff; Plagiocrase rhyolitic tuff, pumice tuff and crystal tuff N1n Basalt; Anchar Basalt N1ar Rhyolite; Rhyolite
Sharenga Rhyolite; Rhyolite piles and necks Upper Basalt; Porous basalt lavas Beyana Tuff; Lapilli tuff with minor laminated tuff Middle Basalt; Porphyritic basalt lavas
Shole Welded Tuff; Densely-welded rhyolitic welded tuff Lower Basalt; Porphyritic basalt lavas
Adigrat Sandstone, Antaro Limestone; Sandstone, Shale and Limestone
Biotite Gneiss, Pegmatite; Biotite Gneiss, Granite, Biotite Metagranite
Plio-Pleistocene
Pliocene
Miocene
Eocene-Oligocene
MESOZOIC
PRECAMBRIAN
