Using the soil erosion model GeoWEPP, the quantity of soil erosion is calculated in a small agriculture area over a long time period. With information about the climate, vegetation, altitude and soil, the system is able to assess and quantify the runoff, soil loss, soil deposition and sediment yield. The investigation area is 13.25 hectare in size and is situated in the district of Mistelbach in Lower Austria. The area is divided into fourteen fields, varying in size and steepness, which are used for different crop rotation as well as for forestry. The time horizons of the simulation are 1960 to 1989 and 1990 to 2007. The calculated sediment yield results in 3680 tons from 1960 to 1989. Due to increased erosive precipitations during the period of 1989 to 2007, the simulation shows a quantity of 6636 tons of eroded material, much higher than in the first simulation period. When analyzing the downward slope, surface area and ratio of coverage, one can observe, that the variable downward slope has the biggest influence on erosion. The quantitatively largest erosion takes place on the steepest slope. Because all the fields have similar ratios of coverage (vegetation as a percentage of the total area) during the precipitations, it is difficult to evaluate the influence of the vegetation. However, the results show that the steeper the slope, the less influence the ratio of coverage has on the prevention of erosion. In summary, the following conclusions can be made: If an area is flat and small, it is more unlikely that erosion will happen than on steeper fields, also with an increase of precipitation frequency or a bigger intensity in the future. In addition, a high percentage of vegetation in the area can protect the soil from erosion.