coping with water scarcity - water accounting: getting the water budget right
DESCRIPTION
Coping with water scarcity - Water accounting: getting the water budget right, , Land and Water Days in Near East & North Africa, 15-18 December 2013, Amman, JordanTRANSCRIPT
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Coping with water scarcity
Water accounting: getting the water budget right
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The conceptual framework
• What is scarcity? • How to conceptualize water scarcity?• How to quantify water scarcity?• What response options are available ?• How to establish priorities?
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Defining water scarcity
“an excess of water demand over available supply”
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Scrutinizing water balance
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Measuring water scarcity
Water accounting – mapping supply and demand:• Volumes and Flows• Quality• Water use:
• consumptive, non consumptive; • formal, informal
• Efficiencies and return flow• Non beneficial ‘losses’
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Water accounting
• Environmental-Economic Accounting for Water (SEEAW)
• Water cost curve approach• Participatory groundwater monitoring • Trade in water rights • Water accounting for firms• Water footprint Network• Remote Sensing based Water accounting
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Water accounting
• Environmental-Economic Accounting for Water (SEEAW)
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Water accounting
• Environmental-Economic Accounting for Water (SEEAW)- Merits:
Standardized approachConsistent with other types of Environmental-Economic Accounting
- Drawbacks:Huge amount of data requiredMethodology focusses on stocks rather than
flows
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Water accounting• Water cost curve approach
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Water accounting
• Water cost curve approach- Methodological drawbacks:
Measures are inter dependentCosts and benefits cannot be summedDownstream impacts are not taken into
account- Merits:
Planning toolNegotiation tool
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Water accounting
• Participatory groundwater monitoring- FAO project in Andra-Pradesh - 4500 farmers in 630 communitees- Measure daily rainfall and fortnightly groundwater levels- Groundwater committees recommend water management practices
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Water accounting
• Trade in water rights (Australia)- General Purpose Water Accounting Reports
prepared by Water Managersfor Water Users, Water Traders,
Environmental Organizations , Policy Makers- Needs detailed information on volumes of water used- Needs clear legislation and law enforcement
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Water accounting
• Water accounting for firms- Reduce reputational risk- Life Cycle Assessment- Global water tool (WBCSD) Global sustainability tool (GEMI)- Methodological challenges:
traceability;consumptive vs non- consumptive use;renewable vs non renewable water
resources
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Water accounting
• Water footprint Network- Water use per product - Useful to show impact of consumption patterns - Methodological challenges:
traceability;consumptive vs non- consumptive use;rainfed vs irrigated agriculture (green vs
blue)
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Water accounting
• Remote Sensing based Water accounting- Measures water consumption- Area based- Suitable for agriculture (irrigated, rainfed) and natural land use- Not suitable for Industry and Municipalities- Does not take into account withdrawals and return flow
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From water accounting to water auditing
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Water auditing methodology overview
Component 1:
Land and water resources database
Component 2:
Water resources availability assessment
Component 3:
Water resources use assessment
Component 5:
Decision support tool
Component 4:
Water resources policy review
Component 6:
Water Audit concluding comprehensive and
summary reports
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Rapid water accounting methodology overview
Component 1:
Land and water resources database
Component 2:
Water resources availability assessment
Component 3:
Water resources use assessment
Component 4:
Analysis
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Component 1: Land and water resources database
Statistical databases
• AQUASTAT• FAOSTAT
Spatial databases
• Climate• Soils• River basins• Irrigation• Population• Cattle density
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Component 2: Component 3:
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Component 4: Analyses
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