@misc{oai:repo.qst.go.jp:00075794,
 author = {Kambayashi, Shota and Aono, Tatsuo and Hamajima, Hiroki and Takahashi, Hiroyuki and Yamamura, Mitsuru and Yamada, Yutaka and Kambayashi, Shota and Aono, Tatsuo and Hamajima, Hiroki and Takahashi, Hiroyuki and Yamada, Yutaka},
 month = {May},
 note = {A huge amount of radionuclides such as radiocaesium and radiostrontium were dispersed and deposited on the territorial area of Fukushima Prefecture, Japan, after the accident at the TEPCO Fukushima Daiichi Nuclear Power Station (FDNPS) on March 2011. Since Fukushima prefecture is covered by 70% of forest area, it is important to clear the distribution, behavior and runoff process of radiocaesium in this area. In this study, we collected stream water from two type of forest catchments (the difference of air does rate) and river water in mainstream within evacuation zone in vicinity of the FDNPS from December 2017 to January 2019, and assessed the distribution, biogeochemical behavior and fluxes of dissolved radiocaesium in these areas. Activity concentrations of dissolved Cs-137 in stream water collected in Takase River (mainstream: ~1 μSv/h), Saruta River (~4 μSv/h), and Maeda River (~2 μSv/h) ranged from 10.3 to 37.2 mBq/L, 44.3 to 322.9 mBq/L and 8.6 to 29.8 mBq/L, respectively. These results indicate that the activity concentration of dissolved radiocaesium is depended on the air does rate around catchment area in the river. Also, activity concentration of dissolved radiocaesium collected in Takase River and Maeda River related to water temperature. This result suggests that influential source of dissolved radiocaesium in these two rivers are desorption from litter. However, activity concentration of dissolved radiocaesium in Saruta River unrelated to water temperature. The relationship between activity concentration of dissolved radiocaesium and total concentration of sodium and potassium showed positive correlation. From these results, it is inferred that some part of radiocaesium in Saruta River is likely bonded to an exchangeable fraction of particles, which is easy to leach into the water caused by ion exchange., 2nd International Conference on Radioanalytical and Nuclear Chemistry(RANC 2019)},
 title = {Behavior of Radiocaesium in Forest Catchments Contaminated by the Fukushima Dai-ichi Nuclear Power Station Accident},
 year = {2019}
}