Exploring the Role of Land Use Settings on Landslide Ellipticity in Volcanic Foot Slope of the Southern Sumbing Mountain, Central-Java Indonesia

This study investigates the effects of landslide processes on land morphology and their management strategies. Land use types determine the size and morphology of the landslide, which is critical for assessment and planning. LiDAR imaging helps to locate the various features of a landslide and human intervention. The research measures the ellipticity of landslides for a 3.2 km 2 area using LiDAR-derived data and ellipse numerical modeling. Landslide boundaries were delineated through automated and manual techniques, considering topographical index, visual interpretation, and expert knowledge. Convex hulls were used to approximate landslide shapes, which were then used to calculate the various ellipticity indices (eL). Bare land, mixed gardens, rain-fed rice fields, and intermittent rivers have a higher eL. Local roads, houses, and irrigated rice fields indicated receding eL values due to the increased level of land management. Changes in eL are affected by the intensity of land use and disturbances related to the wetting of landslide slip areas. Higher ellipticity indicates dynamics in the landslide activity. Therefore, land use planning should be performed considering both natural and non-natural elements in the area.