Chat cu web live xxx - Dating groundwater


Present-day recharge of the aquifer with fresh water occurs at an exceedingly slow rate, suggesting that much of the water in its pore spaces is paleowater, dating back to the most recent ice age and probably earlier.

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During our study period, we found the highest cesium-137 (137Cs) levels (up to 23,000 Bq⋅m−3) outside of the FDNPP site not in the ocean, rivers, or potable groundwater, but in groundwater beneath sand beaches over tens of kilometers away from the FDNPP.

Here, we present evidence of a previously unknown, ongoing source of Fukushima-derived 137Cs to the coastal ocean…

[Researchers] found unusually high levels of radioactive cesium-137 in the groundwater beneath several beaches… As the researchers write, “Aside from the aquifer beneath [the plant], the highest recorded present-day activities of [cesium-137] in the aqueous environment in Japan are associated with brackish groundwater underneath beaches.” IFL Science, Oct 2, 2017: Scientists investigating the Fukushima Daiichi nuclear power plant in Japan have found an unexpected source of radioactive material…

“No one expected that the highest levels of cesium in ocean water today would be found not in the harbor of the Fukushima Dai-ichi nuclear power plant, but in the groundwater many miles away below the beach sands,” WHO researcher Virginie Sanial said… [It’s] an alarming example of how radiation from the reactor has spread…

“It is as if the sands acted as a ‘sponge’ that was contaminated in 2011 and is only slowly being depleted,” said study co-author Ken Buesseler…