Estimation of attached-algae removal amount in gravel-river based on field observation of spatio-temporal distribution of sediment transport
| Project/Area Number |
26820205
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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 | Hiroshima University |
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Principal Investigator |
Tsubaki Ryota 広島大学, 工学(系)研究科(研究院), 助教 (80432566)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 洪水 / フラッシュ放流 / 土砂移動 / ハイドロフォン / 付着藻類 |
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| Outline of Final Research Achievements |
A method to monitor spatio-temporal distribution of graded sediment transport during small/medium flood events was developed. This method was utilized to understand the contribution of sediment transport on attached-algae removal in a section of gravel-bed river during flushing flow events. It was found that transport of medium-sized gravel (d=0.5 to 3 cm) is quite limited even if there is supply from upstream. This is because medium-sized gravel has been trapped in the dents formed between the larger gravels and cobbles. This implies that the contribution of gravel transport during small/medium floods in the focused river section on the attached-algae removal is negligible.
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Report
(3 results)
Research Products
(14 results)
