2. MATERIALS AND METHODS
This study used rainfall, runoff, and SY data to establish a relational curve between the potential maximum retention (S) and SY. Land use and soil data were incorporated with the S–SY curve to estimate the spatial distribution of the potential maximum erosion. Finally, a digital elevation model (DEM) was used to determine the subdivision delineation, and the top-priority management area (Figure 1) was selected based on the potential maximum erosion and slope of each unit area.