| Project/Area Number |
24760402
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Hydraulic engineering
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| Research Institution | Public Works Research Institute |
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Principal Investigator |
YOROZUYA Atsuhiro 独立行政法人土木研究所, その他部局等, 研究員 (00314740)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 土砂動態 / 河川水流量観測 / 河床変動 / 河床高自動計測 / aDcpの活用 / 河床高自動観測 / 河床粗度係数の変化 / 流量観測 / 計測技術 / 粗度係数 / ADCP / 音響測深器 / 音響測深機 |
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| Outline of Final Research Achievements |
This study aimed to understand sediment dynamics during flooding in rivers, as well as application to the river engineering. This study developed the discussion based on observational results as well as the classic sediment hydraulics. The observation was conducted at one of the steepest river using the non-contact current meter for velocity, multiple water gauges for water surface slope, and echo sounder for river bed elevation change. Based on those observed results, types of micro-scale bed form were analyzed depending on the flow stages applying the knowledge of hydraulic resistance of alluvial streams. In addition, estimation of river bed evolution was carried out with the hydraulic resistance, whose results were fairly reasonable compared with the observed results. Finally, this study developed the methodology to estimate the flow discharge considering the river bed elevation change based on the water surface information, such as water surface velocity/slope.
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