EN
This paper presents new concept of integrated model of soil erosion in the catchment. There is one input (rainfall transformed into effective rainfall) and three outputs: hydrograph of runoff, sediment yield in a form of sedimentgraph and spatial distribution of erosion in the catchment. The main body of the model is represented by sedimentgraph, which is constructed using instantaneous unit hydrograph (IUH) and instantaneous unit sedimetgraph (IUSG). The mathematical formula of IUSG was developed. The map of erosion in a catchment is modeled using USLE formula. To verify described model measurements in Olszanka watershed were organized by author. Verification showed that new version of IUSG gives satisfactory results and requires further research both in the modeling of erosion in a catchment scale and monitoring of sources of material transported in the channel.