This week, scientists working on the GRACE mission released a series of images that reflect the drastic loss of groundwater over the last dozen years. The image on the left was taken in June 2002, just three months after GRACE was launched. The one in the middle was taken in June 2008, and the one on the right is from June 2014.
These are not satellite photographs. The colors indicate how much groundwater has been lost over time.
© UC Irvine, NASAThis series of satellite images reflects the huge loss of groundwater in California
Worst hit, according to NASA, are the Sacramento River and San Joaquin River basins, where water has been pumped out to support agriculture in the Central Valley and elsewhere. Since 2011, the amount of water removed from these river basins
each year added up to 4 trillion gallons. That's "an amount far greater than California's 38 million residents use in cities and homes annually," NASA noted.
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