Applicability Evaluation of Slope Disaster Risk Assessment Method in Snowy Cold Regions

Abstract

Climate change-induced large-scale natural hazards are problematic for confrontation. Many of the snowy cold regions of Japan, i.e. Hokkaido, experience multifaceted types of natural disasters, i.e. slope failures and debris flows due to abnormal weather and rainfall patterns which were never encountered in the past. In consideration of the change of extreme weather patterns in future, this study has attempted to develop a wide-area disaster risk assessment at first with introducing an early warning criterion for snowy cold regions and then by proposing and analysing the applicability of a wide-area slope failure analysis method. To this end, we have performed early warning and wide-area numerical modelling studies for various cases of soil slope failures in Hokkaido which shows new paths for the disaster mitigation.