Drone as a tool for geotechnical investigation

Abstract

Natural slopes are naturally exposed to instability due to accidents involving landslides and erosion. In general, access to these areas is difficult due to the uneven profile and inconsistency of the terrain, presenting a risk of accidents. However, for a careful assessment of the level of geological risk to which the slopes are subjected, accurate and detailed topographic and photographic surveys are necessary. In this sense, drone mapping has proven to be an effective tool, as it allows obtaining digital topographic maps supported by photographic documentation in excellent resolution, allowing the identification of the geological features of the surveyed areas. The Mackenzie School of Engineering in partnership with the Francisco Morato city hall carried out a geotechnical investigation and topographic record through photointerpretation of slopes in an advanced process of erosion. As mapping products, the following were generated: the Digital Surface Model (DSM), the Digital Terrain Model (DTM), the 3D Model (mesh), the photo orthomosaic and the contour lines, among others. The detailed evaluation of these products will enable the elaboration of a recovery project for the area.