2011 Fiscal Year Final Research Report
Study on three-dimensional mechanisms of flow and sediment transport in open channels with permeable and impermeable spur-dikes
| Project/Area Number |
21760383
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Hydraulic engineering
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| Research Institution | Public Works Research Institute (2010-2011)
Tokyo Institute of Technology (2009) |
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Principal Investigator |
AKAHORI Ryosuke 独立行政法人土木研究所, 寒地土木研究所寒地水圏研究グループ寒地河川チーム, 研究員 (50452503)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 水制 / 浮遊砂 / LES / 粒子的手法 / 数値計算 / PIV |
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| Research Abstract |
The mechanisms of flow structures and sediment transport around spur-dikes were studied in order to extend our knowledge of environmental applications of spur-dike installations. By applying image-analysis methods to experimental results, three-dimensional structures of flow and sediment transport were clarified. The results showed that the wake flow behind permeable dikes and the over-flow on submerged spur-dikes play important roles on sediment suspension. A numerical model of suspended sediment transport that can reproduce sediment concentration profile around permeable dikes was then developed based on the experimental results.
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