The article describes the Charvak reservoir morphological map development, created using the softs capable of processing, analyzing, and visualizing high-resolution satellite geodata. The study determined the amount of useful volume change during the reservoir's operation. The map was designed to be interactive and processed in real time using GoogleEarth and ArchGIS analytical tools. The study aims to improve effective monitoring of the changes in water reservoir capacity and forecasting the further operational period of the reservoir. The research demonstrates the potential of geoinformation technologies to improve water resources management.