Fig.1 (a) The 137Cs transport into the ocean through the river in 30 years after the accident and the relative contribution of each land use category to the transport and (b) the ratio of 137Cs remained in each land use category after 30 years, and ratio of decrease in the 137Cs content on land

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Fig.1 (a) The ¹³⁷Cs transport into the ocean through the river in 30 years after the accident and the relative contribution of each land use category to the transport and (b) the ratio of ¹³⁷Cs remained in each land use category after 30 years, and ratio of decrease in the ¹³⁷Cs content on land

(a) The relative contribution shows the ratio of ¹³⁷Cs transported from each land use category to the total transport into the ocean.(b) The ¹³⁷Cs deposited on each land use category decreases due to radioactive decay and transport associated with rainfall-runoff. The pie chart shows the ratio of ¹³⁷Cs remained after 30 years, and the decrease ratio of radioactive decay and transport associated with rainfall-runoff.

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