Climate change + population growth set stage for water shortages including in CA, the Southwest; reductions in ag water use will be key to limiting future shortages

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Even efforts to use water more efficiently in municipal and industrial sectors won’t be enough to stave off shortages, say the authors of the new study. The results suggest that reductions in agricultural water use will probably play the biggest role in limiting future water shortages.

The new study is part of a larger 10-year U.S. Forest Service assessment of renewable resources including timber, rangeland forage, wildlife and water. …The new study finds climate change and population growth are likely to present serious challenges in some regions of the U.S., notably the central and southern Great Plains, the Southwest and central Rocky Mountain States, and California, and also some areas in the South and the Midwest.

The heart of the new analysis is a comparison of future water supply versus estimated water demand in different water-using sectors, like industry and agriculture….

  1. Thomas C. Brown, Vinod Mahat, Jorge A. Ramirez. Adaptation to Future Water Shortages in the United States Caused by Population Growth and Climate ChangeEarth’s Future, 2019; DOI: 10.1029/2018EF001091