Presentation Information
[2C13]Investigation on distribution of radioactive substances in Fukushima(8) Elucidation of the dynamics of dissolved Cs-137 from the headwaters to the river by analyzing the water quality of river water
*Kosuke Tomura1, Yuichi Onda1, Junko Takahashi1, Aya Sakaguchi1, Yasunori Igarashi1, Taichi Kawano1 (1. Univ. of Tsukuba)
Keywords:
dissolved Cs-137,Leaching processes,Ion competitiveness,Organic matter decomposition
The leaching process of dissolved Cs-137 in water from the forest headwaters to the river was examined by analyzing the water quality of stream and river water in the forest headwaters in Fukushima Prefecture.
The potassium ion and dissolved organic carbon (DOC) concentrations were measured for the stream and river water in headwaters in Yamakiya district and Kuchibuto river catchment. The result was compared with those of Cs-137 concentrations measured in samples collected at the same time for considering the contribution of leaching due to ionic competition with potassium ions, etc. and leaching due to organic matter decomposition.
As a result, we clarified the process by which the contribution of leaching due to ion-competitiveness increased from the forest source watersheds, where organic matter decomposition was the major leaching process, to the upper, middle, and lower reaches of the river.
The potassium ion and dissolved organic carbon (DOC) concentrations were measured for the stream and river water in headwaters in Yamakiya district and Kuchibuto river catchment. The result was compared with those of Cs-137 concentrations measured in samples collected at the same time for considering the contribution of leaching due to ionic competition with potassium ions, etc. and leaching due to organic matter decomposition.
As a result, we clarified the process by which the contribution of leaching due to ion-competitiveness increased from the forest source watersheds, where organic matter decomposition was the major leaching process, to the upper, middle, and lower reaches of the river.
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