water allocation scenarios to explore green water credits opportunities peter droogers, sei holger...
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Water Allocation Water Allocation ScenariosScenarios
to explore Green Water Credits opportunitiesto explore Green Water Credits opportunities
Peter Droogers, SEIPeter Droogers, SEI
Holger Hoff, SEIHolger Hoff, SEI
Water Evaluation & Planning SystemWater Evaluation & Planning System
SWATSWAT Supply analysis, basin scaleSupply analysis, basin scale
WOFOSTWOFOST Detailed crop analysisDetailed crop analysis
WEAPWEAP Demand size allocation and benefitsDemand size allocation and benefits
Possible questions to be answeredPossible questions to be answered
How is blue water How is blue water currentlycurrently allocated between allocated between different uses? different uses?
What unmet demands can be expected if current What unmet demands can be expected if current trends are projected into the trends are projected into the futurefuture??
What are What are alternative allocationsalternative allocations to maximize benefits? to maximize benefits?
Possible alternativesPossible alternatives
How should reservoirs be operated to maximize How should reservoirs be operated to maximize benefits?benefits?
What would be the downstream effects of additional What would be the downstream effects of additional reservoirs (Mutonga-Grand Falls) ?reservoirs (Mutonga-Grand Falls) ?
What is the effect of erosion control on reservoir What is the effect of erosion control on reservoir siltation and hydropower generation?siltation and hydropower generation?
What is WEAPWhat is WEAP
Old: Water Evaluation and Allocation ProgramOld: Water Evaluation and Allocation Program Water Evaluation And Planning systemWater Evaluation And Planning system
You can click and drag elements of the water system from the legend onto the schematic directly.
Use the menu to do standard functions such as creating new areas and saving.
Your can zoom your schematic in or out by sliding the bar here.
GIS layers can be added here.
Use the View bar to switch between your data and its results.
You can create multiple scenarios and use this box to switch between them.
Use the View bar to switch between your analysis and its results.
Data are organized in a tree structure that you edit by right-clicking here.
Your data are shown here as either a graph or a table.
Enter or edit your data by typing it here.
Data RequirementsData Requirements
Water supply, provided by SWAT modelWater supply, provided by SWAT model• Time series data of riverflows for Tana and tributariesTime series data of riverflows for Tana and tributaries
• River network (connectivity)River network (connectivity)• Reservoir and hydropower generationReservoir and hydropower generation
Water demand, to be provided by national Water demand, to be provided by national partnerspartners
• Time series data of sectoral demandsTime series data of sectoral demands
• Trends in population, economic development etc Trends in population, economic development etc
Complementary dataComplementary data• householdshouseholds• poverty rates in the upstream areas poverty rates in the upstream areas
Data Requirements Data Requirements (continued)(continued)
Sectoral water demandsSectoral water demands Municipal, hydropower and other demandMunicipal, hydropower and other demand
• Aggregated by sectorAggregated by sector• Disaggregated by population (e.g., use/capita, Disaggregated by population (e.g., use/capita,
use/socio-economic group)use/socio-economic group) Agricultural demandsAgricultural demands
• Aggregated by area (# hectares, annual water-Aggregated by area (# hectares, annual water-use/hectare)use/hectare)
• Disaggregated by crop water requirementsDisaggregated by crop water requirements Ecosystem demands (in-stream flow requirements)Ecosystem demands (in-stream flow requirements)
SWAT: Supply siteSWAT: Supply siteHRUs
sbs1997.WYLDMM
01 - 250251 - 500501 - 750751 - 1000
1001 - 12501251 - 15001501 - 17501751 - 20002001 - 3000
Green Water CreditsTana Basin, Kenya
0 50 10025 Km
ConclusionConclusion
Models:Models: SWATSWAT
• Supply (generation of green water credits)Supply (generation of green water credits) WEAPWEAP
• Demand (benefits from green water credits)Demand (benefits from green water credits) Explore scenariosExplore scenarios Proof of green water conceptProof of green water concept
SWAT, WEAP only support tools:SWAT, WEAP only support tools: Socio-economic analysisSocio-economic analysis Policy supportPolicy support
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