Chinese soil erosion classification and grading standards (SL190–2007): water erosion (a) micro (< 2, < 5, < 10 t/ha/year), (b) mild (10–25 t/ha/year), (c) moderate (25–50 t/ha/year), (d) intensive (50–80 t/ha/year), (e) extremely intensive (80–150 t/ha/year), and (f) severe (>150 t/ha/year)

Table 4 Contribution of three factors to soil erosion and sediment yield