2017 Volume 70 Issue 3 Pages 33-40
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.