Journal of the Japan Society of Erosion Control Engineering
Online ISSN : 2187-4654
Print ISSN : 0286-8385
ISSN-L : 0286-8385
Technical Notes
Analyses of heavy rain event triggering slope failures in Minamiaso-Village, Kumamoto Prefecture, after the 2016 Kumamoto Earthquake
Nozomu TAKADAMitsuhide TOMOMURADaisaku SAKAIRyoichi WATANABEKen'ichirou KOSUGI
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2017 Volume 70 Issue 3 Pages 33-40

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Abstract

This study investigated heavy rain event which triggered slope failures in Minamiaso-Village, Kumamoto Prefecture after the 2016 Kumamoto earthquake, by using antecedent precipitation indices (APIs) with various half-life times (HLTs). The snake lines for this event did not exceed critical lines (CLs) defined as the past-maximal values. When CLs were reduced by 0.7 times, excesses of the snake lines were detected for many combinations of HLTs. Thus, this study clearly indicated increases in slope failure vulnerabilities in the region which suffered from the 2016 Kumamoto Earthquake.

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