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Predicting effects on Water Productivity and the Water Balance

Predicting effects on Water Productivity and the Water Balance. DECISION SUPPORT TOOLS AND MODELS FOR:. Predicting Future Water Productivity. WLI Achievements. Good experiences using crop-water-productivity models

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Predicting effects on Water Productivity and the Water Balance

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  1. Predicting effects on Water Productivity and the Water Balance DECISION SUPPORT TOOLS AND MODELS FOR:

  2. Predicting Future Water Productivity WLI Achievements • Good experiences using crop-water-productivity models • Good progress on use of GIS for mapping alternative cropping patterns and scenarios • Identification of a simple reporting method • Socio-economists on board and ready • Strong support network at USAID and USDA ARS

  3. Gross margin per ha, per animal, per cage = [(TP x VS/QS) – IC ] / UP

  4. PREDICTING FUTURE WATER PRODUCTIVITY: Remaining Challenges Scale challenge Diversity of land and water conditions and qualities Diversity of cropping patterns Integrating crops and livestock Other uses of water Definition and measurement of water consumption (Economic aspects, prices, future uncertainties)

  5. Water Productivity Gross margin Water consumed m3

  6. Assessments of Water Balance WLI Achievements • Characterization of benchmark sites • Identification of relevant policies • Sub-national assessments scarce and valuable • Clear role for WLI teams in improvement of relevant policies • Widely recognized need • Use of relevant models incl. WEAP and SWAT • Strong support network in US Universities

  7. Assessments of Water Balance Remaining Challenges Identification of system boundaries Scale challenges Temporal challenges for prediction of future water availability Uncertainty, variability Data access (real and perceived) Some water sources less well understood –i.e. groundwater, reusable wastewater Inter-sectoral cooperation Integration of WLI data elements

  8. w.outimpr. mgt Benchmark Site Cropping Pattern Ha cereals: Ha horticulture: N/ha livestock: Cropping Pattern Ha cereals: Ha horticulture: N/ha livestock: Cropping Pattern Ha cereals: Ha horticulture: N/ha livestock: Present withimpr. mgt Gross Margin/m3 $/m3/yr Gross Margin/m3 $/m3/yr Gross Margin/m3 $/m3/yr Future Management Strategies Annual Water Use m3/yr Annual Water Use m3/yr Annual Water Use m3/yr

  9. Contact: c.king@cgiar.org THANK YOU

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