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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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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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 / 土壌侵食 / 土壌流出軽減策 / 畦畔 / 懸濁物質収支 / 水田法面 / 懸濁物質 / 水田での侵食 / 畦畔侵食 / 降雨強度 / 湛水深 / 植生 |
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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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Report
(4 results)
Research Products
(7 results)
