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Long-term assessment of transport of radioactive contaminant in the environment of Fukushima (F-TRACE Project), 5; River simulation using one dimensional code TODAM

Saito, Tatsuo; Kurikami, Hiroshi; Onishi, Yasuo*; Oda, Yoshihiro; Kitamura, Akihiro

The radioactive Cs deposited on the surface of Fukushima prefecture from Fukushima Nuclear Power Plant explosion occurred in 2011 is significant issue and the prediction of its distribution and fate is indispensable for a number of reason including external and internal radiation exposure and impacts on agricultural environments and aquatic biota. Cs is well known to adsorb with clay rich soils, and therefore its transportation mechanism is mainly in the form of soil erosion on the land surface and sediment-sorbed contaminants transport in the water system such as rivers. The transportation of Cs due to the soil erosion is simulated by USLE based model and that due to the river is simulated by TODAM model using USLE based model results as input data. In this trial calculation, we used the Ukedo river as a model river and transportation of sediments and Cs from the dam to the river mouth was simulated.

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