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Journal Articles

Effect of shallow groundwater discharge on the formation of dissolved Cs-137 concentrations in surface water in a forest headwater catchment

Kato, Hiroaki*; Niwano, Yuma*; Akaiwa, Satoru*; Donovan, A.*; Takahashi, Junko*; Onda, Yuichi*; Niizato, Tadafumi

Journal of Environmental Management, 390, p.126222_1 - 126222_11, 2025/08

https://doi.org/10.1016/j.jenvman.2025.126222
 Times Cited Count：2 Percentile：62.88(Environmental Sciences)

Journal Articles

Overview of environmental impact assessment studies on radioactive contamination after the Fukushima Daiichi Nuclear Power Plant accident

Iijima, Kazuki; Hayashi, Seiji*; Tamaoki, Masanori*

Global Environmental Research (Internet), 24(2), p.85 - 93, 2021/06

Environmental radioactive contamination by the Fukushima Daiichi Nuclear Power Plant accident has clearly been declining during the passage of almost 10 years from the accident. However, the prolongation of radioactive contamination in natural ecosystems probably derived from forested area without decontamination is pointed out by many studies, so more detailed examination will be needed for environmental dynamics of bioavailable radiocesium and its transfer to ecosystems. Also for influence of radiation to organisms, effects of evacuation on wild organisms are more pronounced than direct effect from radiation, especially in Fukushima evacuation area.

Oral presentation

Factors controlling dissolved $$^{137}$$Cs concentrations in east Japanese rivers

Tsuji, Hideki*; Ishii, Yumiko*; Hayashi, Seiji*; Shin, M.*; Taniguchi, Keisuke*; Arai, Hirotsugu*; Kurihara, Momo*; Yasutaka, Tetsuo*; Kuramoto, Takayuki*; Nakanishi, Takahiro; et al.

no journal, , 

Controlling factor of dissolved $$^{137}$$Cs concentrations in 66 in East Japan rivers was investigated. Dissolved $$^{137}$$Cs concentrations decreased by one order of magnitude between 2012 and 2017. Normalized dissolved $$^{137}$$Cs concentrations correlated well with building area ratios. Topographic wetness index generally predicted dissolved $$^{137}$$Cs concentrations. The high concentration of dissolved $$^{137}$$Cs in urban area cannot be explained by water quality condition.

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