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Widespread adoption of efficient irrigation technologies, including drip irrigation, has been proposed as a means of limiting groundwater overexploitation, especially in the intensively farmed and water-stressed South Asia region. This paper reports on a randomized controlled trial conducted in the Indian state of Andhra Pradesh to evaluate the potential productivity and water-saving benefits of smallholder drip irrigation. A group of well-owners was encouraged to adopt drip irrigation through a subsidy scheme, whereas a control group was left to its own devices. The results indicate that, after three years, the drip group shifted into more remunerative and irrigation reliant crops, enjoyed higher agricultural revenue, and transferred (primarily through cash sales) more of its groundwater to adjacent plots. In terms of groundwater pumping, which has zero marginal price in this setting, there is precisely zero difference between the drip and control groups. The evidence thus suggests that drip adoption in South India, while increasing irrigation efficiency, will not save groundwater.

Agricultural Irrigation and Drainage --- Agricultural Productivity --- Agricultural Sector Economics --- Agriculture --- Groundwater Depletion --- Irrigation --- Irrigation and Drainage --- Water Conservation --- Water Resources --- Water-Saving Technology

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Over-pumping of aquifers is a worldwide problem, mainly caused by agricultural water use. Among its consequences are the falling dry of streams and wetlands, soil subsidence, die-off of phreatophytic vegetation, saline water intrusion, increased pumping cost and loss of storage needed for drought relief. Stopping or reversing the trend requires management interventions. The North China Plain serves as an example. A management system is set up for a typical county. It contains three components: monitoring, decision support based on modelling, and implementation in the field. Besides all monitoring data, the decision support module contains an irrigation calculator, a box model, and a distributed groundwater model to project the outcomes of different water allocation scenarios. In view of grain security, a solution combines an adaptation of the cropping system with imports of surface water from the South. The Open Access book does not only describe the problem and the path to its solution. It also gives access to nine manuals concerning methods used. They include computer programs and the game Save the Water. The Chinese experience should be of considerable interest to other regions in the world which suffer from over-pumping of aquifers.

Hydrology & the hydrosphere --- Sustainability --- Environmental monitoring --- Analytical chemistry --- Agricultural science --- Groundwater management --- Groundwater depletion --- Groundwater modelling --- Monitoring of groundwater levels --- Pumping tests for monitoring of pumping rates of wells --- Subsidized land fallowing --- Groundwater game app --- Smart metering of pumping wells --- Smart metering of electricity consumption --- Surface water diversion --- Decision support system --- Open Access

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This book is a hard copy of the editorial and all the papers in a Special Issue of the peer-reviewed open access journal ‘Water’ on the theme ‘Managed Aquifer Recharge for Water Resilience’. Managed aquifer recharge (MAR) is the purposeful recharge of water to aquifers for subsequent recovery or environmental benefit. MAR is increasingly used to make water supplies resilient to drought, climate change and deteriorating water quality, and to protect ecosystems from declining groundwater levels. Global MAR has grown exponentially to 10 cu.km/year and will increase ten-fold within a few decades. Well informed hydrogeologists, engineers and water quality scientists are needed to ensure that this investment is effective in meeting increasingly pressing needs. This compilation contains lessons from many examples of existing projects, including several national and continental summaries. It also addresses the elements essential for identifying and advancing projects such as mapping aquifer suitability and opportunities, policy matters, operational issues, and some innovations in MAR methods and monitoring. This collection exemplifies the state of progress in the science and practice of MAR and is intended to be useful, at least to water managers, water utilities, agricultural water users and urban planners, to facilitate water resilience through new MAR projects.

Research & information: general --- ASR --- recycled water --- well clogging --- geochemical analysis --- filtration --- biofouling --- risk management --- Managed Aquifer Recharge (MAR) --- aquifer storage and recovery (ASR) --- strategic storage --- Northern Australia --- Managed Aquifer Recharge --- MAR --- climate change --- water management --- IWRM --- adaptation measures --- indicators --- Spain --- groundwater --- mapping --- Sweden --- decision-support --- riverbank filtration --- pharmaceuticals in groundwater --- removal of pharmaceuticals --- managed aquifer recharge --- web GIS --- web tools --- multi-criteria decision analysis --- suitability mapping --- anthropic forcing --- meteorological forcing --- lake bank filtration --- mixing ratios --- environmental tracer --- time-varying mixing model --- sensitivity analysis --- Ulaanbaatar --- MATLAB --- FEFLOW --- artificial recharging scenarios --- Mexico --- legal --- regulatory --- framework --- LAN (Law of the Nation’s Waters) --- reclaimed water --- arid --- semi-arid --- environment protection --- health protection --- safety --- risk --- ecosystems --- contaminants --- recycling --- drinking water --- regulation --- governance --- SAT --- tillage --- infiltration pond --- infiltration rate --- soil compaction --- types of MAR for irrigation --- Yellow River Irrigation District --- adaptability zoning evaluation --- online flow-cytometry --- enzymatic activity --- ultrafiltration --- ATP --- managed aquifer recharge (MAR) --- induced bank filtration (IBF) --- geographic information science (GISc) --- geographic information systems (GIS) --- drinking water supply --- guidelines --- climate adaptation --- stream temperature --- streamflow --- Henry’s Fork --- fisheries --- Snake River --- Idaho --- water rights --- infiltration basin --- cost function --- suitability map --- GIS-MCDA --- water supply security model --- risk assessment --- decision support --- dynamic --- probabilistic --- integrated water resource management --- organic amendments --- contaminants of emerging concern (CECs) --- pathogens --- new water challenges --- Underground Transfer of Floods for Irrigation --- droughts --- floods --- groundwater depletion --- groundwater recharge --- water quality --- water level monitoring --- recharge performance --- rainwater harvesting --- India --- water security --- urban water management --- semiarid --- Social Technology --- developing countries --- Africa --- water banking --- water crisis

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book is a hard copy of the editorial and all the papers in a Special Issue of the peer-reviewed open access journal ‘Water’ on the theme ‘Managed Aquifer Recharge for Water Resilience’. Managed aquifer recharge (MAR) is the purposeful recharge of water to aquifers for subsequent recovery or environmental benefit. MAR is increasingly used to make water supplies resilient to drought, climate change and deteriorating water quality, and to protect ecosystems from declining groundwater levels. Global MAR has grown exponentially to 10 cu.km/year and will increase ten-fold within a few decades. Well informed hydrogeologists, engineers and water quality scientists are needed to ensure that this investment is effective in meeting increasingly pressing needs. This compilation contains lessons from many examples of existing projects, including several national and continental summaries. It also addresses the elements essential for identifying and advancing projects such as mapping aquifer suitability and opportunities, policy matters, operational issues, and some innovations in MAR methods and monitoring. This collection exemplifies the state of progress in the science and practice of MAR and is intended to be useful, at least to water managers, water utilities, agricultural water users and urban planners, to facilitate water resilience through new MAR projects.

Research & information: general --- ASR --- recycled water --- well clogging --- geochemical analysis --- filtration --- biofouling --- risk management --- Managed Aquifer Recharge (MAR) --- aquifer storage and recovery (ASR) --- strategic storage --- Northern Australia --- Managed Aquifer Recharge --- MAR --- climate change --- water management --- IWRM --- adaptation measures --- indicators --- Spain --- groundwater --- mapping --- Sweden --- decision-support --- riverbank filtration --- pharmaceuticals in groundwater --- removal of pharmaceuticals --- managed aquifer recharge --- web GIS --- web tools --- multi-criteria decision analysis --- suitability mapping --- anthropic forcing --- meteorological forcing --- lake bank filtration --- mixing ratios --- environmental tracer --- time-varying mixing model --- sensitivity analysis --- Ulaanbaatar --- MATLAB --- FEFLOW --- artificial recharging scenarios --- Mexico --- legal --- regulatory --- framework --- LAN (Law of the Nation’s Waters) --- reclaimed water --- arid --- semi-arid --- environment protection --- health protection --- safety --- risk --- ecosystems --- contaminants --- recycling --- drinking water --- regulation --- governance --- SAT --- tillage --- infiltration pond --- infiltration rate --- soil compaction --- types of MAR for irrigation --- Yellow River Irrigation District --- adaptability zoning evaluation --- online flow-cytometry --- enzymatic activity --- ultrafiltration --- ATP --- managed aquifer recharge (MAR) --- induced bank filtration (IBF) --- geographic information science (GISc) --- geographic information systems (GIS) --- drinking water supply --- guidelines --- climate adaptation --- stream temperature --- streamflow --- Henry’s Fork --- fisheries --- Snake River --- Idaho --- water rights --- infiltration basin --- cost function --- suitability map --- GIS-MCDA --- water supply security model --- risk assessment --- decision support --- dynamic --- probabilistic --- integrated water resource management --- organic amendments --- contaminants of emerging concern (CECs) --- pathogens --- new water challenges --- Underground Transfer of Floods for Irrigation --- droughts --- floods --- groundwater depletion --- groundwater recharge --- water quality --- water level monitoring --- recharge performance --- rainwater harvesting --- India --- water security --- urban water management --- semiarid --- Social Technology --- developing countries --- Africa --- water banking --- water crisis