U.S. Geological Survey study on groundwater depletion



The total depletion of groundwater in the United States from 1900 to 2008 was about 1000 cubic kilometers, more than twice the amount of water in Lake Erie, according to a 10 May report by the U.S. Geological Survey, Groundwater Depletion in the United States (1900–2008), that includes an evaluation of long-term cumulative depletion volumes in 40 separate aquifers in the United States. “This large volume of depletion represents a serious problem in the United States because much of this storage loss cannot be easily or quickly recovered and affects the sustainability of some critical water supplies and base flow to streams, among other effects,” the report notes. For more information, see http://pubs.usgs.gov/sir/2013/5079/.