The determinant factors of landslides in Lima puluh kota regency using bivariate statistical analysis 2015-2020

Abstract

Regarding disasters, West Sumatra Province have multi-hazard risks. Lima Puluh Kota Regency as a part of the region was frequently hit by floods, landslides, and tornadoes. Especially, almost all of its districts are prone to landslides. The purpose of this study is to analyse the significant factors influencing or controlling landslides in susceptible areas. Eleven natural and human-related factors were supposed to influence were analyzed. This study used bivariate statistical analysis with weight of evidence (WOE) method. The 142 land slides points occurrence from 2015 to 2020 had collected from historical records and field survey. Data divided into 83 train and 59 test data set. The results show there are eight factors that influences landslide occurrence: geology condition, landform, land cover, elevation, density of vegetation greenness, slope, rainfall intensity, and proximity to stream. The other three factors such as soil type, curvature of the slope, and aspect of slope were not taken into account because they are not considered to have a significant influence on landslides.