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Uncertainty analysis on soil erosion parameters for radiocesium transport in the Abukuma River basin

Ikenoue, Tsubasa ; Shimadera, Hikari*; Kondo, Akira*

This study focused on the uncertainty of the factors of the USLE and evaluated its impacts on the environmental fate of $$^{137}$$Cs simulated by a radiocesium transport model in the Abukuma River basin. In the USLE, soil loss is expressed as a product of factors representing rainfall (R factor), geology (K factor), topographic (L $$times$$ S factor) and land cover and soil erosion prevention act (C $$times$$ P factor). The simulation results showed total outflows of suspended sediment and $$^{137}$$Cs were the most sensitive to C $$times$$ P factor among the all factors. Therefore, land cover and soil erosion prevention methods have the great impact on outflow of suspended sediment and $$^{137}$$Cs.

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