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Bursting with water

发布时间:2019-03-06 03:02:14来源:未知点击:

By Catherine Zandonella SATELLITES could pinpoint plentiful new sources of groundwater in arid regions of the world by spotting the slight swelling of the Earth’s surface caused by underground reservoirs. Just as a sponge swells when it gets wet, the Earth’s crust can plump up when underground aquifers fill with water. Now Wesley Danskin and Zhong Lu of the US Geological Survey have shown that satellites can spot this swelling. At the moment,