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Suitability Mapping as a New Tool to Support Sustainable Groundwater Use for Solar Irrigation

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Presented by Dr. Petra Schmitter of IWMI on April 13, 2018 at the International Forum on Solar Technologies for Small-Scale Agriculture and Water Management, held at FAO Headquarters in Rome, Italy. This presentation is based on the report, Suitability mapping framework for solar photovoltaic pumps for smallholder farmers in sub-Saharan Africa: https://cgspace.cgiar.org/handle/10568/58399

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Suitability Mapping as a New Tool to Support Sustainable Groundwater Use for Solar Irrigation

  1. 1. Suitability mapping as a new tool to support sustainable groundwater use for solar irrigation Dr. Petra Schmitter, International Water Management Institute 13th April, Rome
  2. 2. Solar based smallholder irrigation in Africa • High potential • Status:  Implementation studies  Potential market studies  Manufacturers and retailers • Gaps:  Suitable business models  Financial support mechanisms (credit, tax reduction,…)  Equal opportunity on technology access  Policy and regulation to ensure environmental sustainability
  3. 3. Suitability mapping • Decision-making support tool to guide investments, policy and regulatory context • Support change on how solar irrigation is planned, developed and implemented • Provide better understanding of the impacts and real scalability of solar irrigation • Provide insights into environmental sustainability of solar based irrigation Otoo, M., et al. 2018. Business model scenarios and suitability: smallholder solar pump-based irrigation in Ethiopia. (IWMI Research Report 172)
  4. 4. Open source GIS multi-criteria tool • Parameters:  Solar irradiation  Landscape & crop  Water resources (gw & sw)  Proximity to markets  Solar PV pump type • Steps:  Constraints  Reclassification & weighing  Suitability analysis check • Countries: Ethiopia, Ghana, Mali Schmitter, P., et al. 2018. Suitability mapping framework for solar photovoltaic pumps for smallholder farmers in sub-Saharan Africa Applied Geography, 94: 41-57
  5. 5. Suitability of solar PV irrigation Ethiopia • Current irrigated land: ~1 M ha • Ethiopian government aims at expansion of: ~ 11 M ha • Solar powered Irrigation potential :  GW (7m): ~2.1 M ha  GW (25m): ~ 6.3 M ha  GW & SW: ~ 6.8 M ha Schmitter, P., et al. 2018. Suitability mapping framework for solar photovoltaic pumps for smallholder farmers in sub-Saharan Africa Applied Geography, 94: 41-57
  6. 6. Solar pump suitability and irrigated land • Solar pump potential to support irrigated land: ~167, 000 ha (15%) • Solar pump potential to transform rainfed agriculture: ~ 6.6 million ha (32%) Schmitter, P., et al. 2018. Suitability mapping framework for solar photovoltaic pumps for smallholder farmers in sub-Saharan Africa Applied Geography, 94: 41-57
  7. 7. Focus on areas that are relevant • Support irrigation planning at basin scale • Help target incentives and government resources • Monitor inequalities in development and use of natural resources  Avoid over-extraction of groundwater and surface water resources in highly suitable areas  Inclusive policy and development (community based participative models) Closas, A.;, Rap. E. 2017. Solar-based groundwater pumping for irrigation: Sustainability, policies, and limitations. Energy Policy,104:33-37
  8. 8. Support investments • Identify market potential in areas where water resources are suitable (private sector)  Market incentives /responsible investment environment  Reduce risk for investment  Remove bottlenecks (legislation, innovative business models) • Concentrate technology transfer • Improve domestic technology infrastructure • Value chains and market access • Retail, supply, maintenance Closas, A.;, Rap. E. 2017. Solar-based groundwater pumping for irrigation: Sustainability, policies, and limitations. Energy Policy,104:33-37
  9. 9. Resilient out-scaling of solar based irrigation • Knowledge sharing and capacity development • Suitable innovative business models ensuring inclusiveness and equity within the socio-economic context • Include environmental indicators to ensure sustainable outscaling and monitoring
  10. 10. Thank you

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