2017 Fiscal Year Final Research Report
Sediment resuspension mechanism of rice paddy soil for reducing the pollutant runoff from paddy fields
| Project/Area Number |
15K07644
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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 |
Rural environmental engineering/Planning
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| Research Institution | Utsunomiya University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 水田 / 雨滴侵食 / 土壌保全 / 流出軽減策 / 水環境保全 |
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| Outline of Final Research Achievements |
I investigated sediment resuspension of rice paddy soil driven by raindrops and wind as external force, suspended sediment movement, and measures to reduce suspended sediment runoff from paddy fields. The following conclusions are obtained. (1) When the paddy water depth is shallow during rain events, paddy soil is resuspended by the impact that raindrops collide with the water surface. (2) Paddy field water near levees tends to be suspended during rain events. (3) The amount of suspended sediment runoff on the non-vegetated levees is more than that on the vegetated levees. (4) The runoff mitigation efforts on the paddy fields results in a reduction of suspended sediment runoff.
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| Free Research Field |
水質環境工学，流域工学
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