Effects of Natural and Artificial Impacts on a Stability of Alternating Bars in Rivers - towards Sustainable River Environment Management by Sediment Control
| Project/Area Number |
26420498
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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 |
Hydraulic engineering
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| Research Institution | The University of Tokushima |
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Principal Investigator |
MUTO Yasunori 徳島大学, 大学院理工学研究部, 教授 (40263157)
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| Co-Investigator(Kenkyū-buntansha) |
水谷 英朗 京都大学, 防災研究所, 助教 (00636756)
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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 |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 河道砂州 / 流砂 / 河床変動 / 河床表層土砂 / 洪水 / 河道整正 / 低水護岸 / 河道横断構造物 / 河道内樹林 / 澪筋 / 砂利採取 / 河川構造物 / 局所洗掘 |
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| Outline of Final Research Achievements |
Effects of natural and artificial impacts on a stability of sand bars in rivers were studied utilizing field survey data and laboratory experiments. The results show that artificial impacts such as dam construction and/or bank protection affect to some extent sand bar formation and its stability through changing not only sediment discharge but also its grain size constitution. In addition, flood frequency trend in recent years also changes both sediment yields and riverine vegetation growth/decay. This is deemed to cause extreme stabilization of sand bar, especially its bipolarization. The research outputs can be used as a fundamental information for developing a sediment control technique towards sustainable river environment restoration.
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Report
(4 results)
Research Products
(13 results)
