Susanna Werth

Co-author, assistant professor of hydrology and remote sensing at Virginia Tech

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Upper Colorado River Basin loses groundwater faster than drier Lower Basin

Assistant professor at Virginia Tech

The Upper Colorado River Basin lost 4.6 trillion gallons of groundwater during the 2020-2022 drought — enough to half-fill Lake Powell. That's nearly double the loss in the drier Lower Basin, a reversal of what researchers expected from the snow-fed Upper Basin.

Updated 1 hour ago