Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6963060 | Environmental Modelling & Software | 2015 | 21 Pages |
Abstract
Simulation of the watershed-scale fate and transport of radionuclides is required in order to predict the consequences of contamination redistribution. Integrated watershed modeling is a suitable technique for this task, but it requires fully coupled investigation of radionuclide behavior in surface water, suspended sediment and subsurface aquifers. We developed a novel simulator for computing the spatiotemporal redistribution of fallout radionuclides in watersheds. The simulator was applied to an actual reservoir basin contaminated by fallout radionuclides from the Fukushima Dai-Ichi Nuclear Power Plant accident in 2011. As a result, the simulated 137Cs concentration in bottom sediment showed a reasonably close match with the measurement data. The distribution coefficient of 137Cs consistent with the latest measurement data was identified as being at least 400,000Â L/kg, and it was estimated that more than 90% of the total 137Cs distributed in the fallout remains in the catchment area.
Keywords
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Physical Sciences and Engineering
Computer Science
Software
Authors
Koji Mori, Kazuhiro Tada, Yasuhiro Tawara, Koichi Ohno, Mari Asami, Koji Kosaka, Hiroyuki Tosaka,