RISK EVALUATION OF LANDSLIDE DISASTERS FROM OUTSIDE THE RAILWAY

As increasing seasonal heavy rain and short-time heavy rain, the railways in Japan suffered from rainfall disasters. Especially, the heavy rain caused landslide and debris flow from outside the railway area, which made difficult to recover the railway. In this study, a risk evaluation was carried out based on the topographical analysis by using a digital elevation model (DEM). Topographic features were discussed through field observation damaged in the 2024 Tohoku heavy rain. Common topographic factors of damaged sites were extracted by analytics of DEM data. High risk areas affected by landslide disasters from outside the railway were identified by the overlaps between railways and steep steam lines.

Keywords: Railway, Natural hazard, Heavy rain, Landslide, Topography.