Proposal for prevention strategies against the enlarged turbidity currents
| Project/Area Number |
23651181
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Natural disaster science
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
BABA Nobuhiro 大阪府立大学, 工学(系)研究科(研究院), 教授 (10198947)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 土砂災害 / 防災 / 乱泥流 / 重力流 / 計算流体力学 |
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| Research Abstract |
This study proposes the practical methods of controlling the turbidity currents and the strategies to protect human properties in the serious disasters which have been more frequently brought about by heavy precipitation extraordinarily concentrated in some local mountainous areas due to global warming. We carried out the experiments using a small inclined tank and the computations based on the finite volume solution of the Navier-Stokes equations for such enlarged turbidity currents. The results indicate that the interaction of the currents with the obstacles certainly reduces the rate of energy supply to the head from the latter part of the current by dividing the powerful head with a large amount of the mass and energy into the upper and lower parts. It is found that as a result even the system of horizontal flat structures away from the bottom has considerable effects to depress the destructive impact force without any burden on the environment.
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Report
(4 results)
Research Products
(2 results)
