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Mapping groundwater's influence on the world's oceans

Researchers at The Ohio State University have created high-resolution maps of points around the globe where groundwater meets the oceans -- the first such analysis of its kind, giving important data points to communities and conservationists to help protect both drinking water and the seas.  In a study published June 3 in the journal Geophysical Research Letters, the team showed that nearly half of fresh submarine groundwater discharge flows into the ocean near the tropics. They also found that regions near active fault lines -- the area around the San Andreas Fault in California, for example -- send greater volumes of groundwater into the ocean than regions that are tectonically stable. And, they found that dry, arid regions have very little groundwater discharge, opening the limited groundwater supplies in those parts of the world to saltwater intrusion.  Read more...



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