Figure 6. Subdivisions of the Chenyulan River catchment area.
2.3.5.2 Slope
Studies have shown that natural factors such as climate, land cover
pattern, topography, geology, and soil characteristics affect soil
erosion (Vrieling, 2006; Shin, Park, Pierson, & Williams, 2019). This
study incorporated the CN method, potential maximum retention, and SY to
estimate the potential maximum erosion of the catchment area. This
method considered climate, land cover pattern, geology, and soil
characteristics but did not consider topography. Therefore, this study
established the average slope of each subdivision based on the DEM to
correct the model.