| Project/Area Number |
26450214
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
Shinomiya Yoshiki 国立研究開発法人森林総合研究所, 東北支所, グループ長 (20353716)
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| Co-Investigator(Kenkyū-buntansha) |
小林 政広 国立研究開発法人森林総合研究所, 震災復興・放射性物質研究拠点, チーム長 (50353686)
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| Co-Investigator(Renkei-kenkyūsha) |
TSURITA Tatsuya 国立研究開発法人森林総合研究所, 立地環境研究領域, 主任研究員 (30353775)
SHICHI Koji 国立研究開発法人森林総合研究所, 立地環境研究領域, 主任研究員 (10353715)
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| Research Collaborator |
OHNUKI Yasuhiro
TSUBOYAMA Yoshio
SAWANO Shinji
ITOH Yuko
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 森林 / 放射性セシウム / 懸濁物質 / 間伐 / 流出 / 地表被覆度 |
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| Outline of Final Research Achievements |
We investigated discharge of suspended solids (SS) and radiocesium (Cs-137) from a planted forest watershed before and after line thinning. Some of SS concentrations were higher after thinning than before thinning. We found that thinning had an influence on the SS discharge. We investigated the Cs-137 concentrations of SS from February 2012 to June 2016. Cs-137 concentrations in SS were not related to thinning and dropped during large storms. With the exception of large storms, Cs-137 concentrations in SS did not increase during or after thinning but decreased gradually. Immediately after thinning, SS discharges increased but Cs-137 concentrations in SS decreased in flood events. Therefore, Cs-137 export from the forested watershed did not increase sharply according to thinning. Also, for smaller areas of bare land, SS discharges and Cs-137 exports would decrease.
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