Over-extraction of groundwater for crop irrigation is one of the main causes of groundwater depletion in regions including Mexico, North East China, northern Africa, the Middle East, and the Midwest, south and west US.
The research, from Purdue University and the University of New Hampshire, examined how water use at a local level is shaped by large-scale effects such as changing population, affluence, climate, and technology. It is published today in the journal Environmental Research Letters. Lead author Dr Jing Liu, from Purdue University, said: "Our findings show that pursuing sustainable irrigation -- targeting future water security -- cannot be done in isolation. It is important to consider its interaction with other sustainable development goals.
Fact - Improvements - Productivity - Irrigation - Water
"In fact, without significant simultaneous improvements in the productivity of irrigation water, it could cause a rise in food prices and additional cropland expansion. Our modelling shows that this in turn would lead to a further 800...
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