Abstract
In the Japanese archipelago, four typhoons continuously hit during mid to late August 2016, which led to significant damage in wide areas of Hokkaido. Considering the social importance of this heavy rainfall-induced geo-disaster, the Japanese Geotechnical Society (JGS) organized “JGS Survey Team for Geotechnical Disasters in Hokkaido, Japan Induced by Heavy Rainfall on August, 2016,” comprising experts from both industry and academia of the Hokkaido branch of the JGS. The aim of the survey team was to investigate the phenomena and factors contributing to disaster prevention/mitigation from both short- and mid- to long-term perspectives and provide academic advice to related organizations. This study summarizes the site investigation of a disaster-stricken area along the National Highway Route 274 around the Nissho Pass, as well as the endogenous and exogenous factors for slope failures caused by this historical heavy rainfall.
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References
The Japanese Geotechnical Society (2017a) Geo-disaster report on the August 2016 Hokkaido Heavy Rainfall, Survey Team for Geotechnical Disasters in Hokkaido, Japan Induced by Heavy Rainfall on August, 2016, JGS. https://www.jiban.or.jp/wp-content/uploads/2017/08/final_report_ver0.12s.pdf (in Japanese)
The Japanese Geotechnical Society (2017b) Proceedings of Symposium on geo-disasters in snowy cold regions associated with climate change. JGS Hokkaido Branch Research Committee on Geo-disaster Risk in Snowy Cold Regions associated with Climate Changes (in Japanese)
Zhu Y, Ishikawa T, and Shimizu Y (2018) Surface flow analysis of Typhoon 10 induced slope failure based on digital elevation modelling. In: Proceedings of the 9th symposium on sediment-related disasters, pp 121–126
Acknowledgments
The author sincerely acknowledges all those who provided “JGS Survey Team for Geotechnical Disasters in Hokkaido, Japan Induced by Heavy Rainfall on August, 2016” with valuable information and research supports, particularly the Hokkaido Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism and Hokkaido Government, and Profs. S. Kawabata, Y. Kohata, and S. Kawamura (members of the JGS survey team).
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Ishikawa, T. (2021). Lessons from Recent Geo-Disasters in Hokkaido Under Heavy Rainfall. In: Arbanas, Ž., Bobrowsky, P.T., Konagai, K., Sassa, K., Takara, K. (eds) Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction. Springer, Cham. https://doi.org/10.1007/978-3-030-60713-5_13
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DOI: https://doi.org/10.1007/978-3-030-60713-5_13
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