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As groundwater depletes, arid American West is moving east

ScienceDaily (February 13, 2020)

Titre : As groundwater depletes, arid American West is moving east

ScienceDaily (February 13, 2020)

Résumé
Loss of groundwater may accelerate drying trends in the eastern United States, according to research that applied supercomputing to create an in-depth model of how groundwater will respond to warming.

Most global circulation models don’t take into account the lateral movement of water in the subsurface. Typically, they only include limited up-and-down movement, such as rain percolating from vegetation into the soil and roots pulling up water from the ground. In addition, these models tend to limit their scope to mere meters above or below ground. This new study goes beyond that to simulate how water moves in the subsurface and connects with the land surface. The calculations revealed a direct response of shallow groundwater storage to warming that demonstrates the strong and early effect that even low to moderate warming may have on groundwater storage and evapotranspiration.

Story Source  : University of Arizona.

Annonce (ScienceDaily)

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