Bathymetric measurements are important for mapping relief of current reservoirs and streams. Due to the lack of similar measurements in the Czech Republic is presented diploma thesis focused on the implementation of the first bathymetric survey on the water reservoir located on the basin Němčice - Sedlický stream. As a part of the work was done bathymetric data collection device River Surveyor M9 data processing interpolation procedures and evaluate the mutual comparison of estimation results. It was also evaluated the effect of the resolution to the retention volume of the tank and its sedimentations regime. Based on the evaluation of the measurement is based on a minimum average error method Universal Kriging. Processed data were measured during the year 2015. The result of the work can serve as a guide for subsequent measurements and estimates bathymetric data on a similar small reservoirs in the catchment areas of the Czech Republic.