Artur Jose Soares Matos,Marcus Vinícius Estigoni,Frederico Fábio Mauad, USP-EESC, , arturjmatos@gmail.com
ABSTRACT --- This work aims to compare different methods for bathymetric surveys in large reservoirs in order to evaluate changes in the volume estimation. For each reservoir were applied different distances between the parallel transects to be compared. The parallel method was also compared to the transects in zigzag. Tools of geographic information systems (GIS) were used in this work to generate digital elevation models (DEM) and to calculate volumes. It was observed that the variation of the technique involves significant changes in the result. It is concluded that the method used in the bathymetric survey of reservoirs should be carefully evaluated before the start of field surveys for the construction of the curve elevation-areavolume in order to having the smallest possible error.
Keywords: Bathymetry, Sedimentation, Reservoir.