Factoid/2017/12/26
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Contaminants in submarine groundwater discharge
- "Most raindrops find their way to the oceans via streams and rivers. But some of them also wind up as a part of a hidden underground flow that seeps into the ocean through seafloor fissures. When this water, called submarine groundwater discharge (SGD), trickles through contaminated soil and rock, it can pick up and transport a variety of ions, nutrients, and chemicals to the sea—including pollutants that contribute to coastal dead zones and toxic algal blooms...12% of the U.S. coastline is particularly vulnerable to contamination, including parts of the northern Gulf Coast, the Pacific Northwest, and the northern Atlantic coast, where high rates of seepage overlap areas of human development." - Excerpt from Science.
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