Analysis of vulnerability levels in avalanche disaster studies

Abstract

Geographically, Indonesia is a country that is both potentially prone to disasters such as volcanic eruptions, earthquakes, tsunamis, floods and landslides. An analysis of the level of vulnerability to landslides has been carried out in the area of West Sumatra. Landslides occur due to gradual changes in composition, structure, hydrological cycle or vegetation conditions in an area. Areas with very low to low landslide susceptibility levels are in the southeastern region. Areas with a moderate level of vulnerability to landslides are spread from west to east from West Sumatra. In the western part of the area is dominated by a fairly large soil movement factor, while in the southern part, the dominant factor is a steep slope. Areas with high to very high landslide susceptibility levels are in the northern and southern regions. This high vulnerability area can occur if the rainfall is above normal, especially in areas bordering river valleys, escarpments, road cliffs or if the slopes are disturbed.