Use of Geographic Information Systems for Mapping Landslide Susceptibility in the Bangsal Sub-Watershed, Mojokerto

Abu Aizhar Raihan Ardhian; Bakti Wisnu Widjajani; Maroeto

doi:10.25077/jijcs.v8i3.223

Authors

Abu Aizhar Raihan Ardhian Universitas Pembangunan Nasional "Veteran" Jawa Timur
Bakti Wisnu University Development National “Veteran” East Java
Maroeto University Development National “Veteran” East Java

DOI:

https://doi.org/10.25077/jijcs.v8i3.223

Keywords:

geographic information systeme, land cover, landslide susceptibility, rainfall, slop

Abstract

Landslides are natural phenomena that often occur in Indonesia, especially in areas with a humid tropical climate and varied topography. Mojokerto Regency is one of the areas prone to landslides, especially in the Bangsal Sub-Watershed. Landslides are triggered by a combination of factors such as high rainfall, steep slopes, unstable soil conditions, and lack of vegetation cover. This study aims to identify the main factors associated with landslide susceptibility and map the level of landslide susceptibility in the Bangsal Sub-Watershed of Mojokerto using a Geographic Information System (GIS). This study includes secondary data covering annual rainfall, soil type, geology, land cover, and slope inclination, which were analysed using ArcGIS software. The methods used were overlay, weighting, and scoring of each parameter to produce a landslide susceptibility map. The results of this study show that there are three classifications of landslide susceptibility in the Bangsal Sub-Watershed, namely moderate class with an area of 3.1 ha or 0.07%, high class with an area of 4,708.32 ha or 98.85%, and very high class with an area of 51.49 ha or 1.08%. Rainfall received the highest weight in the scoring model used in this study

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