In California, as of December 2014, 11 trillion gallons of water to recover from the current drought. That equals 42 cubic kilometers and around 1.5 times the maximum volume of the largest U.S. reservoir.
The finding was presented by NASA scientists at the American Geophysical Union meeting in San Francisco. Information from the Airborne Snow Observatory indicate that snowpack in California’s Sierra Nevada range was only half of previous estimates. Along with the drought, The California Department of Water Resources shows land in the San Joaquin Valley is sinking faster than ever before, nearly 2 inches (5 centimeters) per month in some locations.