Study on transport behavior of radiocesium from river watershed to coastal marine environment and its ecological effects
| Project/Area Number |
24310009
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kanazawa University |
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Principal Investigator |
NAGAO Seiya 金沢大学, 環日本海域環境研究センター, 教授 (20343014)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Masayoshi 金沢大学, 環日本海域環境研究センター, 教授 (10121295)
FUKUSHI Keisuke 金沢大学, 環日本海域環境研究センター, 准教授 (90444207)
KIRISHIMA Akira 東北大学, 多元物質科学研究所, 准教授 (00400424)
INOUE Mutsuo 金沢大学, 環日本海域環境研究センター, 助教 (60283090)
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| Research Collaborator |
TOMIHARA Seiichi
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2012: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
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| Keywords | 河川流域 / Cs-137 / Cs-134 / 溶存態 / 懸濁態 / 河川水 / 移行動態 / 沿岸生態系 / 福島県 |
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| Outline of Final Research Achievements |
The secondary dispersion of radiocesium is important to understand the migration behavior of radiocesium (134Cs and 137Cs), released from the Fukushima Dai-ichi Nuclear Power Plant (NPP) accident, in river systems running through the areas with widely various radiocesium deposition. This study investigated radiocesium radioactivity in river waters in Abukuma, Same, Natsui, Niida, and Uta Rivers, Japan. The secondary dispersion exhibited that total radioactivity of radiocesium decreased concomitantly with increasing time after the NPP accident at normal flow condition. Higher radioactivity and particulate phase percentage were found at high flow condition caused by rain events. The percentage of particulate phase for May-September 2011 was 20-30 points lower than those after December 2011 at normal flow condition. These results indicate that the supply of radiocesium from the watershed differs from the early stage up to September-December 2011 and from the last stage.
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Report
(4 results)
Research Products
(28 results)
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[Journal Article] Migration behavior of 134Cs and 137Cs in the Niida River water in Fukushima Prefecture, Japan2015
Author(s)
Nagao, S., Kanamori, M., Ochiai, S., Inoue, M., and Yamamoto, M.
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Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Volume: 303
Issue: 2
Pages: 1617-1621
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Transport of POM in Japanese river systems after heavy rain events by typhoon in 2011-20132014
Author(s)
S. Nagao, T. Suzuki, S. Ochiai, S. Tomihara, A. Kirishima, M. Kanamori, H. Uemura, Y. Miyata, A. Goto, T. Hasegawa, M. Yamamoto
Organizer
17th IHSS International Conference
Place of Presentation
イオアニア、ギリシャ
Year and Date
2014-08-31 – 2014-09-05
Related Report
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[Presentation] 河川を含めた陸水経由の蓄積2013
Author(s)
長尾誠也、金森正樹、富原聖一、落合伸也、山本政儀
Organizer
2013年日本海洋学会春季大会シンポジウム
Place of Presentation
東京海洋大学(品川)
Year and Date
2013-03-25
Related Report
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