| Project/Area Number |
13574006
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
水工水理学
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
EGASHIRA Shinji Ritsumeikan University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (00027286)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAKITA Eiichi Kyoto University, Faculty of Engineering, Department of Global Environment Engineering, Associate Professor, 大学院・工学研究科, 助教授 (70183506)
NAKAGAWA Hajime Kyoto University, Research Center for Disaster Environment, Disaster Prevention Research Institute, Professor, 防災研究所, 教授 (80144393)
MIZUYAMA Takahisa Kyoto University, Faculty of Agriculture, Division of Forest Science, Professor, 大学院・農学研究科, 教授 (00229717)
ITOH Takahiro Ritsumeikan University, Faculty of Science and Engineering, Assistant Professor, 理工学部, 講師 (80334035)
SHIMIZU Yoshihiko Gunma University, Faculty of Engineering, Department of Civil Engineering, Associate Professor, 工学部, 助教授 (70178995)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥10,800,000 (Direct Cost: ¥10,800,000)
Fiscal Year 2003: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2002: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2001: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | Abnormal meteorological event / Floods / Sediment hazards / Sediment runoff / Debris flow / Countermeasures against sediment hazards / 扇状地災害射策 / 扇状地災害対策 / 洪水災害 / 集中豪雨災害 / 土砂災害対策 / 降雨特性 / 降雨流出 / 河川変動 |
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| Research Abstract |
This joint research was conducted to analyze 1999-sediment disaster from a viewpoint sediment dynamics as well as to propose reliable tools for countermeasures against sediment hazards, and four sub-topics were studied. 1. Characteristics of heavy rainfall in Caribbean Sea coastal region of north Venezuela. 2. Simulation of 1999-sediment runoffs and sediment runoff characteristics after the disaster. 3. Historical aspects of sediment disasters and 4. Countermeasures of sediment hazards. The results are summarized as follows.
1. Meteorological interactions between temporal and spatial scales associated with the heavy rainfall are analyzed. Based on the results, a method is proposed to distinguish an abnormal rainfall from numerous events.
2. 1-D and 2-D mathematical methods for predicting sediment runoff are refined by applying them to 1999-disasters and tested using sediment runoff data which have been collected since the disaster. These are assured to be powerful tools in delineating hazard maps.
3. The results obtained from the study on historical aspects of sediment disaster suggest that usual education performances, hazard maps and associated land uses are of importance to reduce sediment hazards in addition to proper structural countermeasures.
4. Mathematical tools are proposed to specify the location, type and size of debris control structure.
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