Empleo de técnicas VANT en el análisis geomorfológico de la evolución de un movimiento de ladera. Caso de estudio Belén - Polígono 2

Abstract

Abstract: This research focused on the geomorphological analysis of the evolution of a landslide using Unmanned Aerial Vehicle (UAV) techniques. The case study concerns a polygon in the Belén sector, Loja, Ecuador. The UAV was applied in two flight missions, in July and November 2025. The generation of georeferenced products point cloud and digital elevation model (DEM) using the structure-for-motion (SfM) methodology was ensured by acquiring ground control points (GCPs) with GNSS. Using the DEM products, derived models (slope, TPI, TRI, TWI, and geomorphological characterization) were created to demonstrate and characterize the nature of the landslide. The results indicated a subtle, continuous surface deformation with cracks that allow for water accumulation. The model of differences (MdD) confirmed the previous assessment; the difference between the DEMs of each campaign admits the presence of displacements; ascents and descents of material were verified at the foot of slopes and escarpments respectively.