Analysis of environmental fate of radiocesium in the Abukuma River basin for 30 years after the Fukushima Dai-ichi Nuclear Power Plant accident

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

We evaluated the environmental fate of $^{137}$ Cs in the Abukuma River Basin from 2011 to 2040 by using a distributed radiocesium prediction model. The model well reproduced interannual variations in the concentration of $^{137}$ Cs in the suspended sediment and the total outflow of $^{137}$ Cs at Iwanuma near the estuary. Thirty years after the Fukushima Daiichi Nuclear Power Plant accident, it was estimated that the concentration of $^{137}$ Cs in the suspended sediment decreased to 1.9% of the concentration in the earliest phase after the accident and the total outflow of $^{137}$ Cs was equivalent to 4.6% of the initial deposition in the Abukuma River basin.

Language	:	Japanese
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Meeting title	:	第56回日本水環境学会年会
Held date	:	2022/03
Location (city)	:	富山(online)
Location (country)	:	日本
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Keywords	:	福島第一原子力発電所事故; セシウム137; 長期予測; 流域; 河川; Fukushima Daiichi Nuclear Power Station Accident; Cs-137; Long Term; River; Basin
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Cooperating Institute	:	大阪大学

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Registration No. : BB20210984
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