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Marginal erosions in reservoirs of hydroelectric plants have caused economic and environmental problems concerning hydroelectric\udpower generation, reduction of productive areas and devaluing land parcels. The real extension and dynamics of these erosion\udprocesses are not well known for Brazilian reservoirs. To objectively assess these problems Unesp (Univ Estadual Paulista) and\udDuke Energy are developing a joint project which aims at the monitoring the progression of some erosive processes and\udunderstanding the causes and the dynamics of this phenomenon. Mobile LASER scanning was considered the most suitable\udalternative for the challenges established in the project requirements. A MDL DynaScan Mobile LASER M150 scanner was selected\udwhich uses RTK for real time positioning integrated to an IMU, enabling instantaneous generation of georeferenced point clouds.\udTwo different reservoirs were choose for monitoring: Chavantes (storage plant) and Rosana (run-of-river plant), both in the\udParanapanema River, border of São Paulo and Paraná States, Brazil. The monitoring areas are scanned quarterly and analysed with\udbase on the point cloud, meshes, contours and cross sections. Cross sections are used to visualize and compute the rate and the\uddynamics of erosion. Some examples and quantitative results are presented along with an analysis of the proposed technique. Some\udrecommendations to improve the field work and latter data processing are also introduced

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

Monitoring marginal erosion in hydroelectric reservoirs with terrestrial mobile laser scanner