GEOMETRIC LANDSLIDE ANALYSIS BASED ON VANT PLATFORMS AND SIGA SYSTEM PROCESSING: XUNQUEIRA SLOPE, SPAIN

Abstract

The geometry of landslide and subsidence events is important regarding the evaluation of their causes and the optimal decision making towards an effective reconstruction of the structure. Thus, different approaches have been taken for the measurement of geometry following advances in technology. In this paper, an Unmanned Aerial Vehicle (UAV) is used for the acquisition of geometrical information, while GIS processing is applied to the geomorphological analysis of landslides in a slope built for the construction of a road in Ourense, Northwest of Spain. The main advantage of the use of UAV is the high resolution data that can be provided by these platforms, due to the possibility of flying closer to the target than other aerial platforms. Consequently, these platforms are validated for the study of land movements of local scale, with the generation of surface roughness and flow direction maps with the data acquired. Keywords: slope stability, point clouds, UAV, landslide, GIS.