water allocation scenarios to explore green water credits opportunities peter droogers, sei holger...

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Water Allocation Water Allocation Scenarios Scenarios to explore Green Water Credits to explore Green Water Credits opportunities opportunities Peter Droogers, SEI Peter Droogers, SEI Holger Hoff, SEI Holger Hoff, SEI

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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

Thank YouThank You