Migration dynamics of radiocesium in the river systems of the Fukushima Prefecture and surrounding areas

Ochiai, Shinya*; Nagao, Seiya*; Nakanishi, Takahiro; Tsuruta, Tadahiko; Misono, Toshiharu; Watanabe, Shun*; Suzuki, Kyuma*; Tomihara, Seiichi*

no journal, , 

We investigated the controlling factors of radiocesium derived from the nuclear accident in each river systems in Fukushima Prefecture and the surrounding area. Dissolved Cs concentration / Cs deposition ratio tended to be higher in the Tone River and lower in the Natsui River than in the Abukuma River. Dissolved Cs concentration generally decreases exponentially, but the half-life is shorter in the Natsui River and longer in the Tone River than in the Abukuma River.