Assessment of the caesium-137 flux adsorbed to suspended sediment in a reservoir in the contaminated Fukushima region in Japan
Assessment of the caesium-137 flux adsorbed to suspended sediment in a reservoir in the contaminated Fukushima region in Japan
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DOI：
10.1016/j.envpol.2013.12.018
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发表时间：
2014-04-01
影响因子：
8.9
通讯作者：
Hori, Tomoharu
中科院分区：
文献类型：
--
作者：
Mouri, Goro;Golosov, Valentin;Hori, Tomoharu
我们估计了吸附到日本东部福岛地区的Kusaki大坝水库悬浮沉积物中的铯-137的通量，该水库受到福岛核电站事故的污染。根据混合颗粒分布和泥沙输运方程，验证了水库沉积量和沉积速率以及铯-137浓度。铯-137和沉积物通量数据表明，冲刷负荷，悬浮负荷沉积物，和铯-137沉积和排放和运输过程中产生的急性污染，特别是在极端的径流事件。此外，我们定性评估了未来的变化，铯-137和沉积物通量的水库。与21世纪90年代相比，预测开始时的沉积和排放量更高，这很可能是由于铯-137的放射性衰变和水库沉积的影响。预测未来气候对沉积物和铯-137通量的影响对于环境规划和管理至关重要。(C)2013爱思唯尔有限公司保留所有权利。
We estimated the flux of caesium-137 adsorbed to suspended sediment in the Kusaki Dam reservoir in the Fukushima region of eastern Japan, which was contaminated by the Fukushima Nuclear Power Plant accident. The amount and rate of reservoir sedimentation and the caesium-137 concentration were validated based on the mixed-particle distribution and a sediment transport equation. The caesium-137 and sediment flux data suggested that wash load, suspended load sediment, and caesium-137 were deposited and the discharge and transport processes generated acute pollution, especially during extreme rainfall-runoff events. Additionally, we qualitatively assessed future changes in caesium-137 and sediment fluxes in the reservoir. The higher deposition and discharge at the start of the projection compared to the 2090s are most likely explained by the radioactive decay of caesium-137 and the effects of reservoir sedimentation. Predictions of the impacts of future climate on sediment and caesium-137 fluxes are crucial for environmental planning and management. (C) 2013 Elsevier Ltd. All rights reserved.