Dams could play a big role in feeding the world more sustainably, researchers find

Dams could play a big role in feeding the world more sustainably, researchers find PNASNews

Sustainable irrigation's potential

Despite dams' potential, the researchers caution against relying on them as a significant part of the sustainable irrigation solution, citing dams' socio-environmental consequences, such as fragmentation of rivers, with impacts on fish migration and sediment transport, and displacement of people.

Alternative solutions to provide more environmentally sound water storage for irrigation include water harvesting with small dams, recharging groundwater systems with excess surface water fromor spring snow melt, and better management of soil moisture on farm fields. These decentralized approaches lose less water due to evaporation, require less conveyance infrastructure, and often create co-benefits for local communities and wildlife.

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