High groundwater usage sinks land by 28 feet in California
A NASA study shows that excessive groundwater pumping for over a century from wells in California, US has caused some land to subside by 28 feet (8.5 metres). The data was obtained using remote sensing satellites. An upcoming NASA and ISRO collaboration, NISAR, would track land subsidence worldwide due to groundwater pumping, as well as uplift due to groundwater recharge. 