Comparison of Wepp:Road Batch Model and ABAG Model Results for Estimating the Amount of Top Soil Erosion in Forest Road Fill Slopes

The bare surfaces formed on the slopes in the construction of forest roads become the most important sediment sources due to erosion. In this study, it is aimed to evaluate the effectiveness of the WEPP model in local conditions by comparing the data obtained from the same forest roads and the annual soil loss calculated with the WEPP:Road Batch model with the data obtained with ABAG, which is the metric system of the USLE model. For this purpose, analyzes were made on newly built, 5-year and 10-year sample forest roads. Web-based WEPP: Road Batch WEPP Forest Road Erosion Predictor model and ABAG model calculations were performed for the analysis. As a result of the calculations made on newly built road slopes and built 5 to 10 years ago, 7.93-15.5, 1.46-1.59 and 1.58-1.75 tons/ha/year estimated values were obtained for WEEP and ABAG models, respectively. As a result, it is thought that it would be more accurate to determine the annual soil loss precisely by taking samples only from newly built roads, where it is possible to use WEPP: Road Batch software on aged roads. Thus, a strategy can be formed about erosion and slope stability studies on forest roads.