In recent decades we are increasingly facing with many hydrological problems that pose a great challenge and test for humanity. Today, there is a significant need for tools that perform complex analysis of the hydrological regime. On the possible extreme events can be partially prepared and we can effectively implement measures to protect only through adequate studying, predicting and forecasting them.
Knowing the interdependence of flow – duration – frequency allows more complex frequency analysis, which comprehensively defines the occurrence and impact of different interventions on the phenomena. Volume frequency analysis involves classic frequency analysis of maximum (minimum) flow within each of a set of specified durations. Average flow rates are first calculated based on different fixed durations. Then, for each duration frequency analysis of maximum (minimum) flow is performed with selected theoretical distribution.
In the thesis we performed volume frequency analysis with HEC – SSP software for gauging stations in Slovenia. The entire course of volume frequency analysis is shown for gauging station Jesenice on the river Sava Dolinka. The results were used for the case of the reservoir HPP Moste, where we tried to show how the containment of flood flows with different durations influence on reducing the flow downstream of the barrier. We also determined the necessary containment volume of the reservoir for a given maximum inflow volume and the operational installed flow of the HPP Moste.