Low-Flow Channel Variation and Effects of Grain Sorting due to Sediment Augmentation
| Project/Area Number |
19560521
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水工水理学
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| Research Institution | Maizuru National College of Technology |
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Principal Investigator |
MIWA Hiroshi Maizuru National College of Technology, 建設システム工学科, 准教授 (70190832)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 低水路 / 河床低下 / 流路変動 / 混合砂礫 / 分級 / 置き土砂 / 側岸侵食 / 平面二次元河床変動計算 / 蛇行低水路 / 置き土 / 2次元河床変動計算 / 側岸侵食モデル / ダム放流 / 土砂侵食 / 澪筋変動 / 河床回復 / フラッシュ |
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| Research Abstract |
A sediment replenishment technology has been developed which involves the conveyance of part of the sediments excavated and/or dredged from reservoirs to the river below the corresponding dam. This technology has been implemented on a trial basis in several dam. However, this technique is in the development stage because there are many unknown factors. Therefore, systematic investigations are necessary in order to enable practical implementation and management of this technology. In this study, the effects of the location of replenished sediment on sediment flushing and on control of degradation are investigated by means of flume experiments and two-dimensional numerical simulations. The effects of grain size distribution (uniform and non-uniform sediments) on them are also discussed. The flushing process of replenishment sediments were investigated first, and then its effect on river bed degradation was analyzed.
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Report
(4 results)
Research Products
(17 results)
