| Title | Year-round variations in the fluvial transport load of particulate 137Cs in a forested catchment affected by the Fukushima Daiichi Nuclear Power Plant accident |
| Alternative title | 福島第一原子力発電所事故により影響を受けた森林集水域における粒子態137Csの河川移動負荷の通年変動 |
| Publisher | Springer |
| Author | Matsunaga, Takeshi |
| Author | Nakanishi, Takahiro |
| Author | Atarashi-Andoh, Mariko |
| Author | Takeuchi, Erina |
| Author | Muto, Kotomi |
| Author | Tsuzuki, Katsunori |
| Author | Nishimura, Shusaku |
| Author | Koarashi, Jun |
| Author | Otosaka, Shigeyoshi |
| Author | Sato, Tsutomu |
| Author | Miyata, Yoshiki |
| Author | Nagao, Seiya |
| Issued date | 2016-11 |
| Language | eng |
| Page | 679p.-693p. |
| Type | report |
| Description | Particulate 137Cs in stream water was collected continuously for two years in order to assess the long-term trend of the 137Cs discharge from the forest environment. Sampling was conducted from December 2011 to December 2013 in a mountainous stream, which received the 137Cs from the Fukushima Daiichi Nuclear Power Plant accident. A seasonal increase in fluvial transport load of particulate 137Cs associated with suspended solids (SS) was observed in August and September when rainfall was abundant. The particulate 137Cs concentration decreased at a faster rate than the rate due to radioactive decay. This decrease might be resulted from redistribution of the easily eroded and polluted soil surface due to heavy rain events such as typhoons. These findings indicate that the particulate 137Cs load was subject to the inter-annual variations in rainfalls, and decreased gradually over a long period of time due to a decrease in 137Cs concentration in SS. |
| Information source |  JOPSS Relation URLRelation URL |
| Related sites |
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| URI | https://f-archive.jaea.go.jp/dspace/handle/faa/211385 |
