Geomorphological Aspects in Determining the Landslide Risk Zones in Cisangkuy Watershed, Bandung Regency, West Java Province

— The Cisangkuy sub-watershed has a hilly to mountainous landform, dominated by slightly steep to steep slopes. The area's characteristics cause the Cisangkuy sub-watershed to be a landslideprone zone. This study aims to identify and analyze the landslide susceptibility zones based on geomorphological characteristics in the Cisangkuy sub-watershed by utilizing a Geographic Information System (GIS). Research activities are carried out through studio analysis using remote sensing methods and satellite imagery. The geomorphological aspects studied consisted of slope, drainage pattern, lithology, land use, and bifurcation ratio. Based on the results of the analysis, three levels of landslide susceptibility zone were obtained in the study area, including low, moderate, and high levels of landslide vulnerability. The results of the analysis show that the Cisangkuy sub-watershed is dominated by a high level of landslide susceptibility zone, with the morphological characteristics of the area having hilly to mountainous landforms with slightly steep slopes, volcanic rock types, and radial drainage patterns with a bifurcation ratio indicating that it has been controlled by faults. Land use is dominated by settlements, forests, rice fields, plantations, agricultural fields, and shrubs. Some of the main factors that cause landslides are slope, soil type, land use, and rainfall. Therefore, it is necessary to have good regional planning to minimize the impact of landslides in the future