DOI: 10.1007/s11069-020-04321-0
论文题名: Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan
作者: Towhata I. ; Goto S. ; Goto S. ; Akima T. ; Tanaka J. ; Uchimura T. ; Wang G. ; Yamaguchi H. ; Aoyama S.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 105, 期: 1 起始页码: 501
结束页码: 530
语种: 英语
中文关键词: 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]
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169412
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
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]. Natural Hazards,2021-01-01,105(1)