| Issue |
E3S Web of Conf.
Volume 415, 2023
8th International Conference on Debris Flow Hazard Mitigation (DFHM8)
|
|
|---|---|---|
| Article Number | 04004 | |
| Number of page(s) | 4 | |
| Section | Role of Disturbance | |
| DOI | https://doi.org/10.1051/e3sconf/202341504004 | |
| Published online | 18 August 2023 | |
Study on the relationship between rainfall, topography and landslide volume in the recent debris flow disasters in Hiroshima, Japan
1 Asia Air Survey Co., Ltd., Manpukuji 1-2-2, Asao-ku, Kawasaki, 215-0004, Japan
2 National Institute for Land and Infrastructure Management, Asahi 1, Tsukuba, 305-0804, Japan
3 Tsukuba University, Tennodai 1-1-1, Tsukuba, 305-8572, Japan
4 Sabo & Landslide Technical Centre, Hirakawacho 2-7-5, Chiyoda-ku, Tokyo, 102-0093, Japan
5 Hiroshima West-Mountains Sabo Office, MLIT, Hatchobori 3-20, Naka-ku, Hiroshima, 730-0013, Japan
* Corresponding author: tma.eguchi@ajiko.co.jp
Three types of sediment volume estimation equations were developed by analyzing the relationship between rainfall, topography (e.g. slope gradient, relative height) and the volume of collapsed sediment in 1 km grid for heavy rainfall events (2014 and 2018 events) in Hiroshima Prefecture where intensive slope failures and debris flows occurred. All three equations showed a tendency for the volume of collapsed sediment per unit area to increase with increasing rainfall. However, some equations showed the rate of increase tends to gradually plateau.
© The Authors, published by EDP Sciences, 2023
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