Many reservoirs of hydroelectric power plants currently operate with outdated data due to the continuous sedimentation process. This fact demands management and operation policies for these reservoirs based on data different from those actually found. This paper presents a case study of Três Irmãos Reservoir (in São Paulo state, Brazil), where a bathymetric survey was conducted in 2008. From the comparison of the data obtained in the survey and data from 1975 (provided by the power supplier), it was possible to estimate the reservoir losses of total, active, and inactive capacities. From the observation of changes in the reservoir’s operational data, a simulation of the power plant and the reservoir operation was conducted using MODSIM/AcquaNet software to analyze the interference of the reservoir sedimentation with the generation of electricity.
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Miranda et al. (2014) studied this question.
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