Sediment-related disasters induced by the 2018 Hokkaido Eastern Iburi Earthquake

Nobutomo Osanai; Masahiro Kaibori; Takashi Yamada; Mio Kasai; Shin-ichiro Hayashi; Shin'ya Katsura; Takahisa Furuichi; Seiji Yanai; Hiroshi Takebayashi; Takeshi Fujinami; Yasuhiro Murakami; Yu Inami; Hajime Sato; Yasutaka Nakata; Tomoyuki Abe; Hiroyuki Ohno; Toshiya Takeshi; Toshiaki Tanaka; Satoshi Onoda; Hiroki Honma; Kazuki Yanai; Tomoyoshi Miyazaki; Junya Ueno; Tomova Hayakawa; Kouhei Sugai

doi:10.11475/sabo.71.5_54

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Sediment-related disasters induced by the 2018 Hokkaido Eastern Iburi Earthquake

Journal article

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Sediment-related disasters induced by the 2018 Hokkaido Eastern Iburi Earthquake

Nobutomo Osanai, Masahiro Kaibori, Takashi Yamada, Mio Kasai, Shin-ichiro Hayashi, Shin'ya Katsura, Takahisa Furuichi, Seiji Yanai, Hiroshi Takebayashi, Takeshi Fujinami, …

Journal of the Japan Society of Erosion Control Engineering, Vol.71(5), pp.54-65

2019

DOI: https://doi.org/10.11475/sabo.71.5_54

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Abstract

Civil Engineering

2018 Hokkaido Eastern Iburi Earthquake

landslide

sediment-related disaster

pyroclastic fall deposits

On 6th September 2018, a large earthquake (the 2018 Hokkaido Eastern Iburi Earthquake) with the magnitude of 6.7 struck the eastern Iburi region, Hokkaido and triggered numerous landslides. The landslides were distributed densely over hilly areas (400 km2 ) in Atsuma, Abira, and Mukawa Town, the total area of which reached 13.4 km2 . All landslides were shallow landslides except a large-scale deep-seated one generated in midstream area of the HidakaHoronai River. The area is covered by thick pyroclastic fall deposits derived from the Tarumae Volcano etc., and the strong seismic shock triggered shallow landsliding of them. Some shallow landslides occurred at a relatively gentle slope (<15°). Shallow landslides moving along a valley topography tended to travel longer than those moving along a non-valley topography. In catchments where shallow landslides densely occurred, the ratio of landslide area to the total catchment area was very large compared with past earthquake events, suggesting that the catchments became highly devastated. Based on these survey results, we propose viewpoints for preventing secondary disasters in the damaged area and for promoting countermeasures against and studies on earthquake-induced landslide disasters in volcanic regions.

Details

Title: Sediment-related disasters induced by the 2018 Hokkaido Eastern Iburi Earthquake
Authors: Nobutomo Osanai (Author) - Hokkaido University, Japan
Masahiro Kaibori (Author) - Hiroshima University, Japan
Takashi Yamada (Author) - Hokkaido University, Japan
Mio Kasai (Author) - Hokkaido University, Japan
Shin-ichiro Hayashi (Author) - Hokkaido University, Japan
Shin'ya Katsura (Author) - Hokkaido University, Japan
Takahisa Furuichi (Author) - Hokkaido University, Japan
Seiji Yanai (Author) - Ishikawa Prefectural University, Japan
Hiroshi Takebayashi (Author) - Kyoto University, Japan
Takeshi Fujinami (Author) - Civil Engineering Research Institute for Cold, Japan
Yasuhiro Murakami (Author) - Civil Engineering Research Institute for Cold, Japan
Yu Inami (Author) - Civil Engineering Research Institute for Cold, Japan
Hajime Sato (Author) - Hokkaido Rsearch Organisation, Japan
Yasutaka Nakata (Author) - Hokkaido Rsearch Organisation, Japan
Tomoyuki Abe (Author) - Hokkaido Rsearch Organisation, Japan
Hiroyuki Ohno (Author) - Sabo and Landslide Technical Centre, Japan
Toshiya Takeshi (Author) - Sabo and Landslide Technical Centre, Japan
Toshiaki Tanaka (Author) - Sabo and Landslide Technical Centre, Japan
Satoshi Onoda (Author) - Asia Air Survey Co Ltd, Japan
Hiroki Honma (Author) - Oyo Corporation, Japan
Kazuki Yanai (Author) - Japan Conservation Engineers of Hokkaido Co Ltd, Japan
Tomoyoshi Miyazaki (Author) - Shin Engineering Consultant Co Ltd, Japan
Junya Ueno (Author) - Shin Engineering Consultant Co Ltd, Japan
Tomova Hayakawa (Author) - Nippon Koei Co Ltd, Japan
Kouhei Sugai (Author) - Universal Technology Co Ltd, Japan
Publication details: Journal of the Japan Society of Erosion Control Engineering, Vol.71(5), pp.54-65
Publisher: Japan Society of Erosion Control Engineering
Date published: 2019
DOI: 10.11475/sabo.71.5_54
ISSN: 0286-8385
Organisation Unit: University of the Sunshine Coast, Queensland; Sustainability Research Cluster
Language: Japanese
Record Identifier: 99451102002621
Output Type: Journal article

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