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A platform for research: civil engineering, architecture and urbanism
Risk Assessment of Landslide Disaster for Detecting Isolated Communities in Wakayama Prefecture After Nankai Trough Earthquake
https://orcid.org/https://orcid.org/0000-0002-8287-1437
https://orcid.org/https://orcid.org/0000-0001-8764-9619
https://orcid.org/https://orcid.org/0000-0003-3110-7436
Isolated communities after earthquakes face severe problems, such as rescue delays and a lack of daily necessities due to prolonged times required for these to reach isolated areas. It is crucial, especially in mountainous regions, to take countermeasures for slopes that would cause an isolation problem with high probability. Therefore, we proposed an estimation methodology for detecting the isolated communities in mountain region using the slope failure probabilities during earthquakes. In this process, the slope failure probability was calculated using disaster prevention Karte and stability survey tables recorded by every road administration in Japan as well as the peak ground velocity and slope angles. Subsequently, the interruption probability for each road was estimated according to the calculated slope failures. The validity of the proposed method was verified by comparing it with road regulations that came into effect after the 2004 Niigata-ken Chuetsu earthquake. The proposed method was applied to the emergency route in Wakayama Prefecture during a Nankai Trough mega scenario earthquake, and the road interruption probability was subsequently calculated. Furthermore, we showed a case study of detecting slopes that should be taken countermeasures with priority among the fragile slopes along two major routes and demonstrated the effectiveness of the proposed methodology.
Risk Assessment of Landslide Disaster for Detecting Isolated Communities in Wakayama Prefecture After Nankai Trough Earthquake
https://orcid.org/https://orcid.org/0000-0002-8287-1437
https://orcid.org/https://orcid.org/0000-0001-8764-9619
https://orcid.org/https://orcid.org/0000-0003-3110-7436
Isolated communities after earthquakes face severe problems, such as rescue delays and a lack of daily necessities due to prolonged times required for these to reach isolated areas. It is crucial, especially in mountainous regions, to take countermeasures for slopes that would cause an isolation problem with high probability. Therefore, we proposed an estimation methodology for detecting the isolated communities in mountain region using the slope failure probabilities during earthquakes. In this process, the slope failure probability was calculated using disaster prevention Karte and stability survey tables recorded by every road administration in Japan as well as the peak ground velocity and slope angles. Subsequently, the interruption probability for each road was estimated according to the calculated slope failures. The validity of the proposed method was verified by comparing it with road regulations that came into effect after the 2004 Niigata-ken Chuetsu earthquake. The proposed method was applied to the emergency route in Wakayama Prefecture during a Nankai Trough mega scenario earthquake, and the road interruption probability was subsequently calculated. Furthermore, we showed a case study of detecting slopes that should be taken countermeasures with priority among the fragile slopes along two major routes and demonstrated the effectiveness of the proposed methodology.
Risk Assessment of Landslide Disaster for Detecting Isolated Communities in Wakayama Prefecture After Nankai Trough Earthquake
https://orcid.org/https://orcid.org/0000-0002-8287-1437
https://orcid.org/https://orcid.org/0000-0001-8764-9619
https://orcid.org/https://orcid.org/0000-0003-3110-7436
Isolated communities after earthquakes face severe problems, such as rescue delays and a lack of daily necessities due to prolonged times required for these to reach isolated areas. It is crucial, especially in mountainous regions, to take countermeasures for slopes that would cause an isolation problem with high probability. Therefore, we proposed an estimation methodology for detecting the isolated communities in mountain region using the slope failure probabilities during earthquakes. In this process, the slope failure probability was calculated using disaster prevention Karte and stability survey tables recorded by every road administration in Japan as well as the peak ground velocity and slope angles. Subsequently, the interruption probability for each road was estimated according to the calculated slope failures. The validity of the proposed method was verified by comparing it with road regulations that came into effect after the 2004 Niigata-ken Chuetsu earthquake. The proposed method was applied to the emergency route in Wakayama Prefecture during a Nankai Trough mega scenario earthquake, and the road interruption probability was subsequently calculated. Furthermore, we showed a case study of detecting slopes that should be taken countermeasures with priority among the fragile slopes along two major routes and demonstrated the effectiveness of the proposed methodology.
Risk Assessment of Landslide Disaster for Detecting Isolated Communities in Wakayama Prefecture After Nankai Trough Earthquake
Lecture Notes in Civil Engineering
Hazarika, Hemanta (editor) / Madabhushi, Gopal Santana Phani (editor) / Yasuhara, Kazuya (editor) / Bergado, Dennes T. (editor) / Hozumi, Katsuki (author) / Sakai, Hisakazu (author) / Kajitani, Yoshio (author)
2021-02-21
12 pages
Article/Chapter (Book)
Electronic Resource
English
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