Desarrollo de sistemas fotogramétricos para la monitorización 4D de desprendimientos

Resumen

Monitoring the evolution of natural slopes with 3D data is a key strategy for detecting and investigating rockfalls (Abellan et al, 2016). In order to improve our understanding of rock slope failures and to reduce the associated risk, different monitoring strategies have been developed during the last decade using LiDAR, allowing the study of the slopes with an unprecedented level of detail (Abellan et al, 2014). However, due to the high cost of these systems, as well as their complexity, the study of slopes from digital photogrammetric systems has also experienced a considerably growth recently (Eltner et al, 2016). This communication presents some lessons learned from the deployment of two photogrammetric systems installed in the experi- mental study area of Puigcercós (Lleida) allowing the semi-automatic generation of 3D models for studying the cliff together with preliminary results in terms of process investigation. While one system has been developed using low-cost components (Raspberry system - 8 Mpx), the second system has been developed aiming to obtain a highest level of detail (DSLR cameras - 48 Mpx). Both systems are autonomous and transmit images automatically with 4G connection. The systems are scheduled to perform high time frequency data acquisition (more than one acquisition per day) to facilitate 4D monitoring capabilities.