Reservoirs' siltation measurments and sediment transport assessment in the Czech Republic, the Vrchlice catchment study

At the Dept. of Drainage, Irrigation and Landscape Engineering there are datasets of sediment amount from different reservoirs available and other reservoirs are to be measured soon. As the dataset of various watersheds is expanded, a methodology for sediment amount measurements is needed. The main objective of this paper is to propose a simple methodology to measure the sediment amount within reservoirs as well as to present a review of available methods. The application of the methodology at Vrchlice Catchments (97 km2) case study is presented. Total sediment amounts between 125 000∼140 000 m3 were measured in Vrchlice reservoir and values of 110 976 m3 (using USLE), resp. 105833 m3 (using Watem/SEDEM) were predicted by the erosion models. For catchments of this scale it is a sufficient validation.