RESERVOIR

DATA ASSIGNMENT

Climate, land use, irrigation, soil & crop data

Network losses, maximum flow, maximum drawdown,

RESERVOIR

Top of Conservation

Total StorageFlood Control Zone

Water use rate, consumption, return flow fraction

maximum drawdown,Respective operation costsDemand/ supply preferences

Inactive Zone

Buffer Zone

Conservation Zone

Top of Inactive

Top of Buffer

Initial storage, volume-elevation curve, evaporation, losses to GW, hydropower, priority

Project Database

Databases

Data Acquisition

Printed Archives

Field Survey/Sampling

DSS

UPDATE

DSS-DESIGN:

Decision Support – Water Management- Water Balance/ Abstraction Limits/ Safe Yield- Current hydrological year planning- Long term planning and scenario comparison

Model accuracy (modeled/measured)- River gauges - Observation wells- Results by other modelling approaches- General Monitoring data visualization

MODFLOW

GW-Model

Results

WEAP21

WEAP

Scenario

Water Evaluation and Planning System(www.weap21.org – Stockholm Environmental Institute)

Water management and planning model and remote control of MODFLOW to calculate:-groundwater recharge-irrigation demand-detailed water balances for defined spatial planning units

LINKED DSS - MODELING COMPONENTS (calibrated alone beforehand)

MODFLOW GW-FLOW-MODELModflow 2000

WEAP – MODEL (WEAP21)

Mathematical flow model to calculate:

Groundwater:-level-storage-river interaction-discharge at springs planning units

Resolution:-catchment/ landuse class/ MF raster

Input:-climate data-abstraction data (domestic)-soil and crop data-planning scenario setup

Licence:-free to all Arab & Developping country government and research institutions

-discharge at springs

Resolution:-as raster (here 200x200m)

Input:-3D geometry of the aquifer-permeabilities -boundary conditions

Licence:-free

Weap – Modflow interaction(for each WEAP time step)

WEAP:Calculates GW recharge, abstraction rates, river stage for one timestep (based on parameters defined for the respective WEAP-scenario)

WEAP:Transcribes the result into a Modflow-conformalascii-file (*.rch, *.wel, *.riv)

WEAP:Runs mf2k.exe

Modflow:Calculates cell-head, storage volumes, flows …

WEAP:Reads the Modflow result-files and updates the WEAP-internal parameters

Next time step

-in WEAP calculated for each catchment/ land use class (WEAP internal models)- or entered as hard data to the GW-node as “Natural Recharge”

LINKED DSS - MODELING COMPONENTS

MODFLOW GW-FLOW-MODELModflow 2000

WEAP – MODEL (WEAP21)

All data input either to individual cells or to zones (MODFLOW ZONE or GMS “Map to Model”)

Recharge from rain (.rch)- entered to cells or zones

Abstractions (.wel or .rch):

- entered as demand sites (filling the attribute “Demand Site 1” in the link-shape file.-if irrigation is modelled abstraction is evenly distributed among the land use class cellsPumpLayer 1 = .wel, PumpLayer 0 = .rch

-one or multiple RIV/ DRN cells are linked to a river reach (attribute “RIVER” automatically filled by “guess river/ drain linkage”)- in the WEAP schematic a River need to be digitized on top of the RIV / DRN cells

- entered to cells or zones

Rivers/ Springs (.riv .drn)- entered to cells or cell groups- river interaction- discharge at springs

HOW TO LINK THE MODELS TO A DSS ?

MODFLOW2000 GW-FLOW-MODEL

WEAP – MODEL(WEAP time step = MF stress period)

1) Enter data and calibrate the standalone Modflow model

2) Enter data and calibrate the standalone WEAP model (runoff/ GW-recharge?)

3) Link the 2 models by a „linkage shape -file“3) Link the 2 models by a „linkage shape -file“

4) If necessary recalibrate models

5) Incorporate well field characteristics (optional )dry wells-syntax: If(ModflowCellHead(layer, row, column). < meters, 0, 100)

6) Develop scenarios (demands, climate, irrigation practices)

7) Utilize the DSS by discussing results with stake holders and decision makers

8) Update inputs and refine scenarios

WEAP STANDALONE (schematic only)

WEAP linked to MODFLOW (spatially linked thru shape -file)

PILOT STUDY I:

Zabadani Basin

SYRIA

DSS - APPLICATIONS

PILOT STUDY II:

Berrechid Basin

MOROCCO

Hydraulic Basin Agency (ABH) of Bouregreg and Chaouia Basins, Benslimane

El Hajji, K. & Dechich, M.

PILOT AREA I:

ZABADANI BASIN, SYRIA

• Area 165 km², Precip. 700 mm/a

• Existing Water Conflict between multi-groundwater users (Drinking Water – Damascus/ local, Agriculture, Tourism)

• Reasonable data coverage and availability (GDBAB, WRIC, MA, DAWSSA, DRA, …)

• Proximity to the ACSAD headquarters in Damascus

Complexe

Tectonics,

Geology &

Hydrogeology

Cross Sections WNW-ESE

A

Chir MansourHorst Anticline

ZabadaniGraben

CheqifMonocline

B

Preliminary Water Balance 2004/ 2005

GW-Abstraction / Spring discharge Month Barada

Spring Irrigation Domestic SUM Rainfall Recharge BALANCE

10/2004 2.42 4.085 4.559 11.064 1.261 1.113 -9.951 11/2004 5.6 0.000 4.101 9.701 29.943 7.350 -2.351 12/2004 4.53 0.000 3.87 8.400 7.003 7.487 -0.913 01/2005 4.43 0.000 3.228 7.658 21.381 9.301 1.643 02/2005 7.52 0.000 0.766 8.286 27.494 11.408 3.122 03/2005 13.07 0.000 0.766 13.836 3.928 9.980 -3.856 04/2005 9.52 0.000 0.766 10.286 5.61 6.552 -3.734 05/2005 5.77 0.000 0.766 6.536 3.772 3.758 -2.778 06/2005 7.47 2.884 0.766 11.120 1.793 -9.327 07/2005 4.16 14.218 2.038 20.416 1.299 -19.117 08/2005 1.88 2.670 3.593 8.143 1.066 -7.076 09/2005 1.78 7.488 3.952 13.220 0.914 -12.306

SUM 68.15 31.345 29.171 128.666 100.393 62.022 -66.644 All units in Mm³, irrigation and recharge volumes calculated in WEAP

Zabadani Basin

Where does the groundwater come from?

1300

215000 220000 225000 230000

374

0000

374

0000

!(

!(

!(

!(

!(

!( !(

1250

1150

1300

1100

1200

1080

1090

1450

1140

1500

1130

1050

1095

1020

1300

1200

115 0

1232.17

1108.06

1111.01

1100.691110.47

1167.62

1141.58

215000 220000 225000 230000

371

500

0

371

500

0

3720

000

3720

000

372

5000

372

5000

373

000

0

373

000

0

3735

000

3735

000

374

0000

374

0000

Transient state balance in Mm³/y inflow outflow

Storage 40.88 36.86

Constant Head lateral GW-outflow 0 13.43

Wells (here drinking water wellfields) 0 29.56

Drains (Barada Spring) 0 66.71

River Leakage 0.85 8.52

Recharge (net sum of cell values) 137.36 28.49

TOTAL (all in Mm³) 179.09 183.57

Streamf low (below node or reach listed)Scenario: no change, All months, River: BaradaSpring

11.5

11.0

10.5

10.0

9.5

9.0

8.5

8.0

7.5

Groundwater level

Barada Spring discharge

Groundwater balance

Oct

2004

Nov

2004

Dec

2004

Jan

2005

Feb

2005

Mar

2005

Apr

2005

May

2005

Jun

2005

Jul

2005

Aug

2005

Sep

2005

Milli

on C

ubic

Met

er

7.5

7.0

6.5

6.0

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

GW-MODEL

RESULTS

(MODFLOW 2000)

WEAP Model: 11 subcatchments/ 48 landuse classes

Modflow Model:200 x 200m, 3 layersDW: 14 well fieldsIR: evenly thru irrigated area

Annual Water Use Rate

RAWDA HOSH_BEJET MADAYA ZABADANI BLOUDAN DAWSSA EIN HOUR

Milli

on m

^3

15.0

10.0

5.0

0.0