The water basin bottom relief during its lifetime is shaped by the acumulation of the sediments, cleaning processes or the abrasive effects of the water flow. These modifications of the relief leads to the changes of the water basin acumulation capacity. The usage of the GIS for this task means the usage of digital terrain model (DTM), which represents the bottom of surveyed basin. The proposed method for the assessment of the basin capacity uses the poin-type objects. For the collecting of the point coordinates (x, y, z), we used the arrangement of the measuring equippment consisting of the GPS receiver and sonar, which was mounted to the raft boat. The data collection was done during the sailing on the water basin Golianovo. Final DTM was used for the calculation of the water basin capacity with the usage of zonal statistics in ArcGIS 10.

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