气候变化领域集成服务门户(CCPortal): Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan

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DOI	10.1007/s11069-020-04321-0
	Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan
	Towhata I.; Goto S.; Goto S.; Akima T.; Tanaka J.; Uchimura T.; Wang G.; Yamaguchi H.; Aoyama S.
发表日期	2021
ISSN	0921030X
起始页码	501
结束页码	530
卷号	105 期号:1
英文摘要	A volcanic slope in Izu Oshima Island in Japan experienced a profound rain-induced disaster in October 2013. Since this slope had been stable for centuries except for minor failures, a special investigation was carried out on the cause. Because of its volcanic origin, the failed slope consisted of layers of ash, sand and lava. While the investigation concerned many disciplines, the present paper addresses one part of the geotechnical studies. The particular emphasis was put on the reason why some part of the slope “did not” fail because the post-disaster construction of infrastructures in the affected area relied on the future stability of the affected mountain slope. In line with this, another focus of the study was on the geohydrological feature of the underlying lava layer that possibly controlled the instability of the volcanic slope. It was concluded finally that the lava layer is pervious and allows drainage of infiltrated rainwater and that, only during extremely heavy rain, the subsurface lava topography triggered slope failure only in its “valley” parts. For 7 years after the disaster, the remaining parts of the slope have been stable as judged and many local infrastructures have been reconstructed. © 2020, Springer Nature B.V.
关键词	Lava Rainfall-induced disaster Restoration Seepage Volcanic slope
英文关键词	environmental restoration; extreme event; lava flow; meteorological hazard; rainfall; risk assessment; seepage; slope failure; slope stability; Chubu; Honshu; Izu Islands; Izuoshima; Japan; Shizuoka [Chubu]
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206613
作者单位	Kanto Gakuin University, Yokohama, Japan; Yamanashi University, Kofu, Japan; Waseda University, Tokyo, Japan; Fudo Tetra Corporation, Tokyo, Japan; Saitama University, Saitama, Japan; DPRI, Kyoto University, Uji, Japan; Chuo Kaihatsu Corporation, Tokyo, Japan; University of Tokyo, Bunkyo City, Japan
推荐引用方式 GB/T 7714	Towhata I.,Goto S.,Goto S.,et al. Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan[J],2021,105(1).
APA	Towhata I..,Goto S..,Goto S..,Akima T..,Tanaka J..,...&Aoyama S..(2021).Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan.Natural Hazards,105(1).
MLA	Towhata I.,et al."Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan".Natural Hazards 105.1(2021).