Soil erosion problems in the skiing area of the Hirschenkogel/SemmeringAbstractThis thesis basically deals with the problem of soil erosion. A erosion risk map of the ski area of the Hirschenkogel should be created. For modelling erosion risk, soil- and terrain properties, as well as precipitation data are used, whereas anthropogenic affected parameters like vegetation cover or specific land use data are left out. The model for simulating the erosion risk is the Revised Universal Soil Loss Equation (RUSLE). The calculation and visualisation of the required parameters is performed with Geographic Information System software.Additionally a sample area for measuring erosion rates will be installed to compare the current erosion rates with the modelling results. However the main part of this thesis is the data calculation, especially the collection of soil data, which are not available.The final conclusions will be statements to practicability and usefulness of the results.