Conjunctive Management of Water Resources Cover slide option

Conjunctive Management of Water Resources – Cover slide option 1 Title Underground Taming of Floods for Irrigation GEF International Waters Conference - 12 May 2016 Jeremy Bird on behalf of Paul Pavelic International Water Management Institute

CONJUNCTIVE FLOOD AND DROUGHT MANAGEMENT Current Situation – Wet Season Water for a food-secure world www. iwmi. org

CONJUNCTIVE FLOOD AND DROUGHT MANAGEMENT Underground Taming of Floods for Irrigation (UTFI); Wet season Water for a food-secure world www. iwmi. org

CONJUNCTIVE FLOOD AND DROUGHT MANAGEMENT Underground Taming of Floods for Irrigation (UTFI); Dry season Water for a food-secure world www. iwmi. org

SOLVING MULTIPLE PROBLEMS WITH ONE SOLUTION… Upstream Opportunities Rural Farmers Groundwater Downstream Surface Water Urban Flood Managers Impacts

UTFI CONCEIVED & TESTED IN THAILAND 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. Performance testing of basins designed to infiltrate floodwater are positive Falling groundwater level trends are reversed and yearround rice/sugar production maintained 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

IDENTIFYING SCOPE IN THE GANGES BASIN • >60% of inner GB potentially suitable • Prospects in others basins being explored Water for a food-secure world www. iwmi. org

Example of village selection utfi. iwmi. org

UTFI: Stakeholders Consultations • 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 Consultation with Villagers utfi. iwmi. org

UTFI: Site Development Pre implementation Post implementation utfi. iwmi. org

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 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. utfi. iwmi. org

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. utfi. iwmi. org

TYPES OF RISKS & ISSUES TECHNICAL RISKS SOCIAL/INSTITUTIONAL RISKS - poor system design/ - insufficient incentive for land construction and/or site conversion selection - poor or inadequate participation of - low recharge performance local communities / institutions - new upstream developments - cumbersome or overly-complex implementation models ECONOMIC RISKS - high investments or opportunity costs - high maintenance/ operational costs ENVIRONMENTAL RISKS - polluted floodwater enters aquifers - waterlogging due to aquifer overfilling - negative impacts downstream due to interventions

FURTHER INFORMATION ILLUSTRATIVE VIDEO: https: //www. youtube. com/watch? v=9 au 0 Ap. Ulxu 8 WEBSITE: http: //utfi. iwmi. org/

Led by IWMI Groundwater Solutions Initiative for Policy and Practice A global partnership for sustainable groundwater management …to strengthen, expand connect current groundwater initiatives …share experience on solutions and approaches to scaling up … advance the agenda of sustainable groundwater management to achieve the SDGs