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Conjunctive Management of Water Resources – Underground Taming of Floods for Irrigation (UTFI)


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Presented by Presented by Jeremy Bird, Director General - IWMI, (on behalf of IWMI researcher Paul Pavelic) at the 8th Global Environment Facility (GEF) Biennial International Waters Conference (IWC-8) held in Negombo, Sri Lanka, on May 9-13, 2016.

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Conjunctive Management of Water Resources – Underground Taming of Floods for Irrigation (UTFI)

  1. 1. Cover slide option 1 Title Conjunctive Management of Water Resources – Underground Taming of Floods for Irrigation Jeremy Bird on behalf of Paul Pavelic International Water Management Institute GEF International Waters Conference - 12 May 2016
  2. 2. Water for a food-secure world Current Situation – Wet Season CONJUNCTIVE FLOOD AND DROUGHT MANAGEMENT
  3. 3. Water for a food-secure world Underground Taming of Floods for Irrigation (UTFI); Wet season CONJUNCTIVE FLOOD AND DROUGHT MANAGEMENT
  4. 4. Water for a food-secure world Underground Taming of Floods for Irrigation (UTFI); Dry season CONJUNCTIVE FLOOD AND DROUGHT MANAGEMENT
  5. 5. Rural Farmers Urban Flood Managers Surface Water Opportunities Impacts Upstream Downstream Groundwater SOLVING MULTIPLE PROBLEMS WITH ONE SOLUTION…
  6. 6. Performance testing of basins designed to infiltrate floodwater are positive Falling groundwater level trends are reversed and year- round rice/sugar production maintained The Chao Phraya basin lies at the economic heart of Thailand. The basin is routinely affected by major floods downstream, yet farmers, cities & industry frequently run short of water. KEY FINDINGS • Significant volumes of floodwater (30%) can be harvested in wet years without major impacts on existing users or ecosystems • $250 Mill./year of added revenue can be generated • Payback time on capital investments could be just a few years • UTFI would be far cheaper than conventional engineering approaches for flood mitigation UTFI CONCEIVED & TESTED IN THAILAND
  7. 7. Water for a food-secure world IDENTIFYING SCOPE IN THE GANGES BASIN • >60% of inner GB potentially suitable • Prospects in others basins being explored
  8. 8. Example of village selection
  9. 9. UTFI: Stakeholders Consultations Consultation with Villagers • State/District/Division level consultation – to inform UTFI activities and seek support • Village level consultation - to understand willingness to support and maintenance Consultation with District Officials
  10. 10. UTFI: Site Development Pre implementation Post implementation
  11. 11. UTFI: Key Findings • Groundwater level improved by 0.5 m after UTFI implementation • Water level in the piezometers dropped by 2 m after recharge indicating the demand and use of groundwater • Under ideal conditions, the recharge system can intercept 60,000 cum per month, or 180,000 cum for a 3 month recharge season.
  12. 12. Large-scale Implementing Mechanism • To put UTFI in practice, integration with relevant ongoing government programmes is required. • IWMP is one of the best approaches to harvest rainwater to improve livelihood by providing community managed simple low tech solutions and mitigate adverse climatic conditions such as floods. • Convergence between IWMP and MNREGA is crucial and mutually beneficial. • UTFI and IWMP or WDC-PMKSY are perfectly matched as both focused on clusters of micro-watershed level in a holistic manner.
  13. 13. TYPES OF RISKS & ISSUES TECHNICAL RISKS SOCIAL/INSTITUTIONAL RISKS - poor system design/ construction and/or site selection - low recharge performance - new upstream developments - insufficient incentive for land conversion - poor or inadequate participation of local communities / institutions - cumbersome or overly-complex implementation models ECONOMIC RISKS ENVIRONMENTAL RISKS - high investments or opportunity costs - high maintenance/ operational costs - polluted floodwater enters aquifers - waterlogging due to aquifer over- filling - negative impacts downstream due to interventions
  15. 15. Led by IWMI Groundwater Solutions Initiative for Policy and Practice A global partnership for sustainable groundwater management …to strengthen, expand and connect current groundwater initiatives …share experience on solutions and approaches to scaling up … advance the agenda of sustainable groundwater management to achieve the SDGs