Pointers
“Using NASA satellite data, scientists have found that groundwater levels in northern India have been declining by as much as 33 centimeters (1 foot) per year over the past decade. Researchers concluded the loss is almost entirely due to human activity.
More than 108 cubic kilometers (26 cubic miles) of groundwater disappeared from aquifers in areas of Haryana, Punjab, Rajasthan and the nation's capitol territory of Delhi, between 2002 and 2008. This is enough water to fill Lake Mead, the largest man-made reservoir in the United States, three times.”
source: Green Revolution's trail?