Northern India’s Vanishing Water

by Dave


Add this to the potential causes for water wars. More reasons to consider agriculture outsourcing in Latin America to hedge risk as crop areas in Punjab shrink as a result.
via Science Daily

Using satellite data, UC Irvine and NASA hydrologists have found that groundwater beneath northern India has been receding by as much as 1 foot per year over the past decade – and they believe human consumption is almost entirely to blame.

More than 109 cubic kilometers (26 cubic miles) of groundwater disappeared from the region’s aquifers between 2002 and 2008 – double the capacity of India’s largest surface-water reservoir, the Upper Wainganga, and triple that of Lake Mead, the largest manmade reservoir in the U.S.

People are pumping northern India’s underground water, mostly to irrigate cropland, faster than natural processes can replenish it,
said Jay Famiglietti and Isabella Velicogna, UCI Earth system scientists, and Matt Rodell of NASA’s Goddard Space Flight Center.

“If measures are not soon taken to ensure sustainable groundwater usage, consequences for the 114 million residents of the region may include a collapse of agricultural output, severe shortages of potable water, conflict and suffering,” said Rodell, lead author of the study and former doctoral student of Famiglietti’s at the University of Texas at Austin.

Study results will be published online Aug. 12 in the journal Nature.

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