Abstract
Gravitational slope deformation is closely related to deep-seated landslides, loosening, and slope failure on excavation. Gravitational deformation in mountainous region has been surveyed by the aerial photo interpretation. It is pointed out on the basis of the unique terrain such as double ridge and uphill-facing small scarps. Recently the airborne laser scanner has been developed, and it has become possible to grasp the micro-topography of such deformed slopes. Topographic feature of slope deformation is defined in more accurate by performing the analysis of the micro-topography using high resolution DEM compiled from airborne laser scanner. I propose a method for description of micro-topography using geomorphic images created from LiDAR-DEM. I try to estimate the mechanism of gravitational deformation by micro-topographic analysis. The area, depth, and slope stability of gravitational deformation is able to estimate from classification from combination of geological structure and micro-topography.
