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New data to update the models:

After the stakeholders workshop

Third Management Board Meeting

Gumpoldskirchen18-19 May 2006

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INTRODUCTION

- Stakeholders workshop was organised at the CNT, the 3rd of May 2006 with the IRMCo collaboration

- 18 \ 26 institutions were present

- 29 stakeholders+11 from CNT

40 participants

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Agriculture 7Environment 4

Research 5

ONAS CITET ANPE

FSTENIT INRST

Associations & Expert 2

DGRE DGBGTH

CRDA Ben Arous

UTAP

DGACTA

BIRH

DGGREE

INATINRGREF

Stakeholders Institutions

CRDA Zaghouan

APAL

Expert

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Programme

Presentations

ONASOPTIMA projectIRMCo objectives in the workshopMelian case study: RRM and WRM models

Round tables

03 round tables

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Round table 1 :State of the Water Ressources in Basin

Discuss the issues questionnaires

RESULTS: Problem statement for melian Basin

- Water management in the basin is very complex because of the multitude of stakeholders involved in water issues

- The rainfall in the Melian basin is low (450mm)

- Water supply is very dependent on the external importations of water

- Discharge of Untreated wastewater (from sabkhat Sijoumi) into the Melian basin is causing pollution into marine environment

- Groundwater is overexploited (150%), this situation lead to deterioration of the groundwater quality (salinity)

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Round table 2 :Diagnostics of the water ressources

- Present the topological model of the melian basin - Make a critical review of the current model outputs

Results

Demand (Mm3)MODEL REEL

Municipality 4.86 3 - 4Tourism 4.29 0Agriculture 15.26 35-40Industry 1.70 1 - 2TOTAL 26.12 45

1.- Water Demand

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2.- Topological Model

2. Topological Model Melian

Basin 1

Basin 2Bassin El Hma

El Hma dam

STEP

Tourisme

Domestic

Industrie

Canal Medjerda

Irrigation

Grounwater

Sea

Demand

Start

EndNœud de sortie

TreatementReservoir

? ?

??

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The new topological Model

M’chergua reservoir

Sea

Melian basin

Melah basin

Rmel basin

Hma basin

Hma reservoir

Irrigation

STEP

Domestic

Industry

Medjerda canal

GW

Lacs

GW-SONED El Gola-SONED

3 Demand node

9 start node 1 End node

1 Treatment node 2 reservoir node

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Round table 3: Alternative water management scenarios

Compare the performance of baseline scenario

Results

1.- water scenarios

- Reduce the water exploitation of the groundwater

- Create of a new treatment plant in the area, to exploit the treated water for irrigation

- Management of sabkhat sijoumi by ONAS

- The groundwater quantity by artificial recharge coming from surface water (15Mm3) that is not exploited now

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2.- Values assigned to a set of performances indicators

Indicators Model

Output Reality

Overall Supply/Demand Ratio = 98.4 % 110-130 % Reliability of Supply = 73.7 % 100 % Days with flooding 0 days 0 days Cost/Benefit ratio not defined

Round table 3: Alternative water management scenarios

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CONCLUSION

-We constitute a steering committee with 7 stakeholders INRGREF, CRDA, DGRE, UTAP, DG ACTA, ANPE

- Meeting every 3 months

- Give us the data missed and issues questionnaires

-Work on economic evaluation, optimisation, water technology, water quality)

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THANK YOU FOR YOUR ATTENTION