Mechanism and future risk of slope instability induced by extreme rainfall event in Izu Oshima Island, Japan

Ikuo Towhata (), Satoshi Goto, Shigeru Goto, Takeshi Akima, Junya Tanaka, Taro Uchimura, Gonghui Wang, Hiroshi Yamaguchi and Shogo Aoyama
Additional contact information
Ikuo Towhata: Kanto Gakuin University
Satoshi Goto: Yamanashi University
Shigeru Goto: Waseda University
Takeshi Akima: Fudo Tetra Corporation
Junya Tanaka: Fudo Tetra Corporation
Taro Uchimura: Saitama University
Gonghui Wang: DPRI, Kyoto University
Hiroshi Yamaguchi: Chuo Kaihatsu Corporation
Shogo Aoyama: University of Tokyo

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2021, vol. 105, issue 1, No 25, 530 pages

Abstract: Abstract 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.

Keywords: Rainfall-induced disaster; Volcanic slope; Lava; Seepage; Restoration (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://link.springer.com/10.1007/s11069-020-04321-0 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:nathaz:v:105:y:2021:i:1:d:10.1007_s11069-020-04321-0

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11069

DOI: 10.1007/s11069-020-04321-0

Access Statistics for this article

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards is currently edited by Thomas Glade, Tad S. Murty and Vladimír Schenk

More articles in Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards from Springer, International Society for the Prevention and Mitigation of Natural Hazards
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().