Groundwater


Groundwater

Groundwater is water that exists underground in the spaces between grains of sand or gravel or in the cracks and…

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Back to Bikini

Back to Bikini

WHOI scientists returned to the Pacific islands of Bikini and Enewetak in 2015 to study radioactive contamination nearly 70 years after the U.S. used the islands for nuclear weapons testing. What they learned could also be applied to a more recent nuclear disaster: the 2011 Fukushima Daiichi reactor meltdown in Japan.

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‘Seasonal Pump’ Moves Water Between Ocean and Aquifers

'Seasonal Pump' Moves Water Between Ocean and Aquifers

Hydrologists Ann Mulligan of WHOI and Holly Michael and Charles Harvey of MIT have cleared up a mystery of why so much salty water emerges from aquifers into the coastal ocean. The researchers discovered a counterintuitive seasonal pumping system at work.

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Water Flowing Underground

Water Flowing Underground

Groundwater discharge appears to be an important factor for determining the chemistry of the coastal ocean. As fresh groundwater flows toward the sea, it rises up over denser, salty water. The fresh and salty water mix along the interface, and the resulting fluid discharges at the shoreline. This interface between underground water masses has recently been described as a “subterranean estuary,” a mixing zone between fresh and salty water analogous to the region where a river meets the ocean.

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