Debris flow disaster in Atami, Japan, in July 2021
On the morning of July 3, 2021, a large debris flow occurred at the Aizome River in the Izusan district of Atami, Shizuoka Prefecture, Japan. The debris flow caused extensive damage, causing the death of 26 people, leaving one person missing, and damaging 128 houses (as of October 1, 2021). Consiste...
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| Published in | International Journal of Erosion Control Engineering Vol. 15; no. 1; pp. 1 - 6 |
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| Main Authors | , , , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Tokyo
Japan Society of Erosion Control Engineering
06.06.2022
Japan Science and Technology Agency |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1882-6547 1882-6547 |
| DOI | 10.13101/ijece.15.1 |
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| Abstract | On the morning of July 3, 2021, a large debris flow occurred at the Aizome River in the Izusan district of Atami, Shizuoka Prefecture, Japan. The debris flow caused extensive damage, causing the death of 26 people, leaving one person missing, and damaging 128 houses (as of October 1, 2021). Consistently steep channel gradient from initiation zone to river mouth resulted in the extensive damage along the river. The debris flow was characterized by its high fine-grained content, which may have affected the flow characteristics. The debris flow comprised multiple surges with different flow characteristics. |
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| AbstractList | On the morning of July 3, 2021, a large debris flow occurred at the Aizome River in the Izusan district of Atami, Shizuoka Prefecture, Japan. The debris flow caused extensive damage, causing the death of 26 people, leaving one person missing, and damaging 128 houses (as of October 1, 2021). Consistently steep channel gradient from initiation zone to river mouth resulted in the extensive damage along the river. The debris flow was characterized by its high fine-grained content, which may have affected the flow characteristics. The debris flow comprised multiple surges with different flow characteristics. |
| Author | SAKAI, Yusuke KOSUGI, Ken'ichirou TAKAYAMA, Shoki KOIKE, Masaru SAKAGUCHI, Hiroshi IMAIZUMI, Fumitoshi KATO, Shinyu SATOFUKA, Yoshifumi TANAKA, Takafumi OSANAI, Nobutomo NISHI, Yotaro |
| Author_xml | – sequence: 1 fullname: TAKAYAMA, Shoki organization: Shizuoka University – sequence: 1 fullname: SATOFUKA, Yoshifumi organization: Ritsumeikan University – sequence: 1 fullname: NISHI, Yotaro organization: Nippon Koei Co., Ltd – sequence: 1 fullname: IMAIZUMI, Fumitoshi organization: Shizuoka University – sequence: 1 fullname: KOIKE, Masaru organization: Chubu Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism – sequence: 1 fullname: KATO, Shinyu organization: Tamano Consultants Co., Ltd – sequence: 1 fullname: SAKAGUCHI, Hiroshi organization: Asia Air Survey Co., Ltd – sequence: 1 fullname: TANAKA, Takafumi organization: Nagoya University – sequence: 1 fullname: OSANAI, Nobutomo organization: National Graduate Institute for policy studies – sequence: 1 fullname: KOSUGI, Ken'ichirou organization: Kyoto University – sequence: 1 fullname: SAKAI, Yusuke organization: National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism |
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| References | Geospatial Information Authority of Japan (2021): Information On the heavy rainfall from July 1, 2021, https://www.gsi.go.jp/BOUSAI/R3_0701_heavyrain.html#4, referred on October 1, 2021. Shizuoka Prefecture (2021a): 1st validation committee of Aizome River debris flow, overview and first estimation of the initiation mechanism, http://www.pref.shizuoka.jp/kensetsu/ke-350/sabouka/documents/shiryou1.pdf, referred on September 24, 2021. Shizuoka Prefecture (2021e): 2nd validation committee of Aizome River debris flow, debris flow characteristics clarified from motion images taken by residents and records of report in fire station, http://www.pref.shizuoka.jp/kensetsu/ke-350/sabouka/documents/2kennsyouiinnshiryou11-15.pdf, referred on December 6, 2021. NHK: Urban area had been stricken by debris flow for two hours: Validation of Atami debris flow, https://www3.nhk.or.jp/news/html/20210818/k10013207691000.html, referred on October 6, 2021. Imaziumi, F., Osanai, N., Jato, S., Koike, M., Kosugi, K., Sakai, Y., Sakaguchi, H., Satofuka, Y., Takayama, S., Tanaka, T. and Nishi, Y. (2022): Debris flow disaster in Atami, Shizuoka Prefecture, in July 2021, Journal of Erosion Control Engineering, Vol. 74, No. 5, pp. 34-42. Shizuoka Prefecture (2021b): 1st validation committee of Aizome River debris flow, Phenomena of the Aizome River disaster: characteristics of debris flow, http://www.pref.shizuoka.jp/kensetsu/ke-350/sabouka/documents/shiryou1.pdf, referred on September 24, 2021. Shizuoka Prefecture (2021c): Early report of the result of geotechnical survey of debris flow area in Izusan, Atami city, https://www.pref.shizuoka.jp/kensetsu/ke-350/documents/kisyateikyou_doshitucyousakekka.pdf, referred on September 24, 2021. Shizuoka Prefecture (2021d): Voluntary activity of disaster prevention, https://www.pref.shizuoka.jp/bousai/e-quakes/manabu/jisyubou_jirei/documents/h24-3.pdf, referred on September 27, 2021. 1 2 3 4 5 6 7 8 |
| References_xml | – reference: Shizuoka Prefecture (2021a): 1st validation committee of Aizome River debris flow, overview and first estimation of the initiation mechanism, http://www.pref.shizuoka.jp/kensetsu/ke-350/sabouka/documents/shiryou1.pdf, referred on September 24, 2021. – reference: Shizuoka Prefecture (2021e): 2nd validation committee of Aizome River debris flow, debris flow characteristics clarified from motion images taken by residents and records of report in fire station, http://www.pref.shizuoka.jp/kensetsu/ke-350/sabouka/documents/2kennsyouiinnshiryou11-15.pdf, referred on December 6, 2021. – reference: Geospatial Information Authority of Japan (2021): Information On the heavy rainfall from July 1, 2021, https://www.gsi.go.jp/BOUSAI/R3_0701_heavyrain.html#4, referred on October 1, 2021. – reference: NHK: Urban area had been stricken by debris flow for two hours: Validation of Atami debris flow, https://www3.nhk.or.jp/news/html/20210818/k10013207691000.html, referred on October 6, 2021. – reference: Shizuoka Prefecture (2021d): Voluntary activity of disaster prevention, https://www.pref.shizuoka.jp/bousai/e-quakes/manabu/jisyubou_jirei/documents/h24-3.pdf, referred on September 27, 2021. – reference: Shizuoka Prefecture (2021b): 1st validation committee of Aizome River debris flow, Phenomena of the Aizome River disaster: characteristics of debris flow, http://www.pref.shizuoka.jp/kensetsu/ke-350/sabouka/documents/shiryou1.pdf, referred on September 24, 2021. – reference: Imaziumi, F., Osanai, N., Jato, S., Koike, M., Kosugi, K., Sakai, Y., Sakaguchi, H., Satofuka, Y., Takayama, S., Tanaka, T. and Nishi, Y. (2022): Debris flow disaster in Atami, Shizuoka Prefecture, in July 2021, Journal of Erosion Control Engineering, Vol. 74, No. 5, pp. 34-42. – reference: Shizuoka Prefecture (2021c): Early report of the result of geotechnical survey of debris flow area in Izusan, Atami city, https://www.pref.shizuoka.jp/kensetsu/ke-350/documents/kisyateikyou_doshitucyousakekka.pdf, referred on September 24, 2021. – ident: 2 – ident: 3 – ident: 5 – ident: 4 – ident: 1 – ident: 6 – ident: 7 – ident: 8 |
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| Title | Debris flow disaster in Atami, Japan, in July 2021 |
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