Scientists Map U.S. Groundwater, Highlighting Depletion Risks
A team of scientists from Princeton University and the University of Arizona has mapped the groundwater resources across the United States, providing the most comprehensive estimate of the country's underground water reserves to date. Using data from approximately 800,000 wells and a machine-learning model, the researchers estimated the depth of the water table nationwide. The study, published in the journal Nature, reveals that the U.S. has roughly 250 billion acre-feet of groundwater, equivalent to 13 times the volume of the Great Lakes. However, the research also highlights significant depletion in areas like California's Central Valley, where aquifer levels have plummeted due to extensive agricultural use. The findings underscore the importance of managing groundwater wisely, as declines have led to dry wells, disappearing wetlands, and land subsidence. 
