2021 Fiscal Year Final Research Report
Improvement of numerical simulation model on debris/mud flow and its application to evacuation action plan
| Project/Area Number |
19K04615
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22040:Hydroengineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 土石流 / 泥流 / 数値シミュレーション / 土砂災害 / 避難 / 氾濫 |
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| Outline of Final Research Achievements |
In recent years, debris/mud flows caused by surface failures due to high-intensity heavy rainfall occur every year. In order to protect our lives and properties from debris/mud flows, it is important to understand the flow characteristics of the debris/mud flows. In this study, we developed a numerical simulation model of debris/mud flows that takes into account the destruction of houses and phase changes of fine-grained sediment, and applied the developed numerical simulation model to debris flow phenomena in Hiroshima in 2018 and a mud flow phenomena in Atami City in 2021. Based on the time taken for debris/mud flows to reach residential areas, the inundation area, and the spatiotemporal distribution of velocity and depth of debris/mud flows within residential areas, we proposed evacuation methods for residents of each house in debris/mud flow hazard areas.
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| Free Research Field |
砂防工学
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| Academic Significance and Societal Importance of the Research Achievements |
土石流・泥流の流動特性を評価するためのこれらの研究は，国内外の土石流・泥流研究で初めての試みであり，本研究の学術的独自性と創造性を示すものである．また，土石流・泥流の数値シミュレーション結果を用いて，土石流・泥流氾濫地域の土砂災害危険度の空間分布を評価し，家屋ごとの避難方法の提案を行うことについても 国内外の研究で初めての試みであり，本研究の学術的独自性と創造性を示すものである．
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