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Groundwater recharge in the American west under climate change

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November 16, 2017 University of Arizona  read full ScienceDaily article here

Groundwater recharge in the Western US will change as the climate warms — the dry southern regions will have less and the northern regions will have more, according to new research. The new study covers the entire US West, from the High Plains states to the Pacific coast, and provides the first detailed look at how groundwater recharge may change as the climate changes. Groundwater is an important source of freshwater, particularly in the West.

Groundwater…. is often used to make up for the lack of surface water during droughts, the authors note. In many areas of the West, groundwater pumping currently exceeds the amount of groundwater recharge.

“The portions of the West that are already stretched in terms of water resources — Arizona, New Mexico, the High Plains of Texas, the southern Central Valley — for those places that are already having problems, climate change is going to tighten the screws,” Meixner said….

R. Niraula, T. Meixner, F. Dominguez, N. Bhattarai, M. Rodell, H. Ajami, D. Gochis, C. Castro. How Might Recharge Change Under Projected Climate Change in the Western U.S.? Geophysical Research Letters, 2017; 44 (20): 10,407 DOI: 10.1002/2017GL075421

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