2021 Fiscal Year Final Research Report
Proposal of sediment-related disaster occurrence model based on porous body theory
| Project/Area Number |
19K04236
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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 19020:Thermal engineering-related
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| Research Institution | Shizuoka 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 | 多孔質体 / タンクモデル / ヒートアイランド現象 |
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| Outline of Final Research Achievements |
For the purpose of predicting local torrential rain associated with the heat island phenomenon and predicting groundwater movement in soil, we conducted experiments for numerical simulation and tank model construction. It was found that the existence of the urban area that causes the heat island phenomenon keeps the local front slightly on the mountain side of the urban area, and intensive precipitation occurs for a relatively long time, increasing the danger. In addition, the unsteady behavior of the multi-layered in-tank flow was clarified based on a new model in which the porosity and transmittance, which are the characteristics of the underground structure, can be introduced by putting a porous body in the tank. From the experiment of unsteady water flow of the 4-stage tank using the porous body, it was clarified that an index showing the water content performance is necessary for the introduction of the porous body into the tank model.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
局地的集中豪雨の予測とそれに伴う土砂災害の減災に向けて，都市部山側に発生する局地的前線の発生メカニズムにおいて，都市部でのヒートアイランド現象が関与していることが示されたことにより，都市部でのヒートアイランド現象緩和の必要性が示された．また，豪雨に伴う土壌内の水分挙動の予測においては，土壌の透過性などの変化に追従するモデルの提案が必要であり，そのため土壌の含水性を示す指標を導入することで，水害の予測精度向上が目指せることを示した.
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