Landslide susceptibility evaluated by 1-in-50yr values of Soil Water Index and hourly precipitation
| Project/Area Number |
26282080
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
齋藤 仁 関東学院大学, 経済学部, 准教授 (00709628)
泉 岳樹 首都大学東京, 都市環境科学研究科, 助教 (10336513)
中山 大地 首都大学東京, 都市環境科学研究科, 助教 (90336511)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2016: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Keywords | 土壌雨量指数 / 1 時間雨量 / 解析雨量 / 土砂災害 / CL (Critical Line） / 九州北部豪雨 / 無人航空機 / 空中三角測量 / CL (Critical Line) / CL (Clitical Line） / 1時間雨量 / CL（Critical Line） |
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| Outline of Final Research Achievements |
We investigated rainfall conditions of the occurrence of landslides by using hourly precipitation (an index of short-term precipitation) and Soil Water Index (SWI, an index of long-term precipitation that is calculated by inputting hourly precipitation data to the three-stage tank model). At first, we respectively obtained the spatial distribution of 1-in-50yr hourly precipitation and 1-in-50yr SWI throughout Japan. Next, we investigated the relationship between hourly precipitation and SWI when landlides occurred in 2006-2008. Among all 816 cases, 806 landslides occurred when both hourly precipitation and SWI were smaller than respective 1-in-50yr values. Namely, the findings of this study might make us to re-consider the landslide susceptibility in Japan.
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Report
(5 results)
Research Products
(39 results)
