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Distributed modeling of radionuclide washing out from the watersheds in solute and with suspended sediments; Case studies Abukuma River, Fukushima Prefecture and Pripyat-Dnieper river system, Ukraine

溶存態および懸濁態を対象とした分布型放射性核種流出モデリング; 福島県阿武隈川とウクライナPripyat川およびDnieper川流域を対象として

Zheleznyak, M.*; Pylypenko, O.*; Kivva, S.*; 佐久間 一幸   ; 五十嵐 康記*; 脇山 義史*; Konoplev, A.*; 難波 謙二*

Zheleznyak, M.*; Pylypenko, O.*; Kivva, S.*; Sakuma, Kazuyuki; Igarashi, Yasunori*; Wakiyama, Yoshifumi*; Konoplev, A.*; Namba, Kenji*

物理モデルベースの水、土砂輸送を考慮した流域モデルを開発し、福島県内の試験プロットで懸濁態$$^{137}$$Cs流出について試計算を実施した。また、GISベースで経験的な流出率を用いる流域モデルを開発した。開発したモデルを用いて福島県阿武隈川で$$^{137}$$Csについて試計算を実施し、ウクライナのPripyat川とDnieper川を対象に、放射性核種輸送について妥当性を検証した。

We developed physically-based watershed models based on the distributed hydrological-sediment transport model. The model implementation for the experimental plots in Fukushima prefecture was conducted for particulate $$^{137}$$Cs transport. Also, we developed model that combines the watershed empirical models based on the washing-out coefficient approach and GIS data. The model was tested on the basis of the measurements of $$^{137}$$Cs concentration in Abukuma river and validated also on the basis of the data sets of radionuclide transport in the Pripyat and Dnieper rivers.

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