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Report No.

Factors affecting $$^{137}$$Cs concentrations in river water under base-flow conditions near the Fukushima Dai-ichi Nuclear Power Plant

Nakanishi, Takahiro   ; Funaki, Hironori ; Sakuma, Kazuyuki   

To confirm factors affecting $$^{137}$$Cs concentration in river water after the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, this study conducted monthly observations of nine rivers near the FDNPP from April 2017 to March 2018 under base-flow conditions. The annual mean dissolved and particulate $$^{137}$$Cs concentrations correlated well with the mean $$^{137}$$Cs deposition in the catchment. The normalized $$^{137}$$Cs concentrations in both phases by dividing by the mean $$^{137}$$Cs deposition in the catchment showed significant negative correlations with the $$^{137}$$Cs deposition ratio for forests. The inflow from the downstream plain areas increased the $$^{137}$$Cs concentrations near the FDNPP.



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Category:Chemistry, Analytical



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