Researchers Reveal First Map Of All The World’s Available Groundwater : SCIENCE : Tech Times
▻http://www.techtimes.com/articles/107395/20151117/researchers-reveal-first-map-of-all-the-worlds-available-groundwater.htm
Scientists say they’ve completed the first measurements and mapping of the total amount of groundwater under the Earth’s surface.
The amount is enormous, they say, around six quadrillion gallons — that a six followed by 15 zeroes — which, if it was on the surface, would cover our planet’s entire land area with a layer almost 600 feet deep.
However, while the amount is impressive, most of it is too far below the surface to be accessible, and would be unfit to drink even if we could access it, researchers report in a study appearing in Nature Geoscience.