Water Harvesting and Groundwater Recharging in India: Potentials and Pitfalls .

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Water Management in Basin Context. Supply managementBuilding substantial water stockpiling/preoccupation systemsDecentralized WHInter-bowl water transfersDemand managementImproving water use efficiencyAllocation to monetarily effective usesInter-sectoral water allocationInter-local water allocationWater asset and environment administration.
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Water Harvesting and Groundwater Recharging in India: Potentials and Pitfalls M. Dinesh Kumar, B. R. Sharma, Ankit Patel and OP Singh IWMI-Tata Water Policy Research Program

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Water Management in Basin Context Supply administration Building vast water stockpiling/redirection frameworks Decentralized WH Inter-bowl water exchanges Demand administration Improving water utilize proficiency Allocation to monetarily productive utilizations Inter-sectoral water portion Inter-provincial water assignment Water asset and biological community administration

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Supply Side Management of Water Uneven conveyance of water Across bowls Within bowls India has fabricated numerous extensive water asset frameworks 250 km 3 Concentration of stockpiles in water-deficiency ranges Basins in water rare regions are "shut" Water rich zones have poor request Inter-bowl water exchanges

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Water Harvesting and Groundwater Recharge in India Objectives Improve overflow gathering and capacity effectiveness Equitable dispersion of water Resource administration Underlying worth Local water independence; requests are little Assumption More structures mean more advantage Structures are savvy Community-based, decentralized arranging & activity

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Supply-Demand Issues in Rainwater Harvesting Low precipitation, high fluctuation in water rare territories Fewer stormy days in semi dry and parched, water rare regions Evaporation rates are high in water rare districts Large piece of India has hard shake topography

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Supply-request issues in water reaping Runoff forces high and between yearly inconstancy high Water rich Cauvery Water rare north Gujarat Soil penetration limits High water request in water rare regions

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Economic Issues in Water Harvesting Difficulty in assessing the unit costs Lack of information on inflows Lack of information on accumulation and capacity efficiencies Scale contemplations in financial assessments Trade off amongst financial matters and hydrological benefits

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Issues identified with enhancing bowl water economy Demands higher in lower fields of waterway bowls; supply potential is high in upper bowl zones Economic estimation of water high in rare zones Lack of incorporated way to deal with arranging Groundwater adding to surface streams in bumpy zones Lack of water utilize getting ready for collected water Local Vs Basin Impacts in shut bowls Downstream effects of water gathering in Narmada bowl Downstream negative effects in Ghelo stream bowl, Saurashtra

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Findings Limited capability of RWH sought after –supply unevenness low mean yearly rainfalls, high between yearly changeability, high PET & E Inefficient energizing in hard shakes Many water-rare areas have water requests, far surpass the provisions

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Findings Scale contemplations for cost and financial aspects of WHS "Shut" & "Open" bowls U/S preoccupations decrease prospects of D/S Future research in WH incorporate Potential effects of WH on huge water asset frameworks in bowls Optimal level of WH & advancement in various stream bowls with no downstream effects

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How to make water collecting more compelling? Comprehend catchment hydrology better Use of hydrological recreation models for un-gaged bowls Use of remote detecting and GIS to create geo-morphological information for reproduction models Focus on green water, gathered in RWHS Collection productivity Use effectiveness

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How to make water reaping more compelling? Cont… Study bowl water records and water adjust How much water is spent as helpful ET, non-useful Evaporation How much surplus streams accessible for saddling Improve wet water-sparing in water reaping structures and expansive water asset frameworks Develop legitimate water utilize plans for WHS also

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Conclusions Water gathering/watershed projects to be upheld by appropriate comprehension of bowl water records and adjust Developing legitimate water utilize arranging before collecting activities is essential Research on long haul effects of water reaping is imperative. It ought to consider the "scale variable", and cover hydrological and financial goals.

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Thank you for the consideration

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Average Mean Annual Rainfall

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Average Annual Evaporation

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Aquifer System in India

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Stage of Storage Creation in Some Major River Basins in India

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Upstream Vs Downstream Water Demand

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Wells are flooding!

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Effect of Watershed Interventions on Run-Off

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Marginal cost & advantages of water reaping with various phases of bowl advancement

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Mean Annual Rainy Days

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Increasing unit cost for higher overflow accumulation

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