Issue |
E3S Web of Conf.
Volume 415, 2023
8th International Conference on Debris Flow Hazard Mitigation (DFHM8)
|
|
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Article Number | 05017 | |
Number of page(s) | 4 | |
Section | Case Studies and Hazard Assessments | |
DOI | https://doi.org/10.1051/e3sconf/202341505017 | |
Published online | 18 August 2023 |
Topographical criteria for the occurrence of landslides causing debris flows in the 2017 torrential rain in northern Kyushu, Japan
1 Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
1 NEXCO-West Consultants Company Limited, Higashi-ku Futaba-no-sato 3-5-7 , Hiroshima, Japan
1 Kyusyu Electric Engineering Consultants Inc., Chuo-ku Kiyokawa 2-13-6, Fukuoka, Japan
* Corresponding author: takohta@yamaguchi-u.ac.jp
In the volcanic rock fields around Hita City, 19 landslides occurred in the 2017 torrential rains in northern Kyushu, 11 of which triggered debris flows. In order to mitigate debris flows disasters caused by landslides, it is important to assess the points where landslides are most likely to occur. Therefore, topographic profiles of landslide and non-landslide slopes were calculated from digital elevation models obtained before the disaster. The results indicate that there is a topographic criterion for landslide occurrence in the relationship between the topographic position index (TPI) and the tangent Laplacian.
© The Authors, published by EDP Sciences, 2023
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