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Buffering water variability at the river basin scale through UTFI


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Presented by IWMI's Paul Pavelic at the 3rd Asia Pacific Water Summit in Yangon, Myanmar, on December 11, 2017.

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Buffering water variability at the river basin scale through UTFI

  1. 1. Paul Pavelic International Water Management Institute, Lao PDR Buffering water variability at the river basin scale through UTFI 3rd Asia-Pacific Water Summit Technical Session on: ‘Reviving Hydrological Cycles: Rainwater Harvesting and Sustainable Groundwater Management’ 11th December 2017, Yangon, Myanmar Photos: IWMI Too little Too muchToo low
  2. 2. UTFI APPROACH OBJECTIVES • Develop a sound and holistic evidence-based case for Underground Taming of Floods for Irrigation (UTFI) • Facilitate opportunities for scaling up in prospective parts of the Ganges METHODS • Research – mapping, hydrologic/ hydraulic modelling, pilot testing (technical, social/gender, economic, institutional, environmental analysis) • Outreach – workshops, open days, dialogue, trainings etc. Water stored below-ground provides buffering against drought and is utilized to increase dry season agricultural production and safeguard domestic supplies. SCHEMATIC UTFI SCHEMATIC1. CURRENT 2. UTFI WET SEASON 3. UTFI DRY SEASON Season floods inundate urban areas and farmlands; groundwater use creates leads to drying out of shallow wells and higher pumping costs. Floodwater is intercepted upstream at the community level filling the underground storage space created by excessive pumping. Floods are minimized or averted. Source: IWMI
  3. 3. PILOTING UTFI ON THE GANGETIC PLAIN BEFORE AFTER Image credits: IWMI Community pond converted for UTFI in Jiwai Jadid village - the area is often flooded and GW levels have been falling, impacting on domestic water supplies and agricultural livelihoods (a) Basin (b) Pilot site (c) Recharge well PILOT SITE Site selection in western Uttar Pradesh Pilot demonstration trial layout and design
  4. 4. SCIENTIFIC ADVANCEMENTS Volumes of excess flow stored in aquifer are high (40-60 x 103 m3 per year) 2015 2016 2017 Season Recharge Season- 6 0 1000 2000 3000 4000 5000 6000 7000 25-Jul-15 03-Oct-15 12-Dec-15 20-Feb-16 30-Apr-16 09-Jul-16 17-Sep-16 26-Nov-16 04-Feb-17 15-Apr-17 24-Jun-17 02-Sep-17 11-Nov-17 Rechargerate(m3/day) Silt has been effectively managed within the pond, filter and wells Water quality risks have not been exacerbated Potential to scale up to basin scale established through hydro-economic modelling 0 500 1000 1500 2000 2500 0 4 8 12 16 Discharge(m3/s) Return Period (years) Baseline 10% 20% 30% 40% 50% 152 153 154 155 156 157 158 Groundwaterelevation(m) Baseline 10% 20% 30% 40% 50% RETURN PERIOD FLOW GW LEVELS FLOOD INUNDATION
  5. 5. MULTI-SCALE ENGAGEMENT AND IMPACT VILLAGE LEVEL DISTRICT LEVEL STATE LEVEL NATIONAL LEVEL Consultation with villagers Meeting CDO, Rampur DIP Doc. MWR site visit • Acceptance of UTFI by the local community, including women • Site maintenance formalized through MNREGA with community participation • Support from the highest level decision makers in Rampur district • Uptake by UP Govt by inclusion of UTFI in District Irrigation Plan PMKSY (Prime Ministers Irrigation Program) • Growing support from Ministry of Water Resources
  6. 6. KEY MESSAGES GOING FORWARD • First demonstration of community-owned assets converted to UTFI in the Upper Gangetic Plain • Strengthening evidence (technical & non-technical) to justify that UTFI is effective in enhancing GW availability and reducing flood risks UTFI LINKAGES WITH SECTORS AND DEVELOPMENT ISSUES Poverty Reduction Ground- water Floods Irrigation Water- sheds UTFI Rural Development • UTFI can be duly considered by policy makers and developers seeking solutions to development challenges relating to CCA, DRR and SDGs
  7. 7. THANKYOU For further information go to: Undertaken by: With the support of: