| Sub-watershed | Land use types | Area of each land use type (km2) | Variation (km2) | Soil erosion rate(t/km2) | Variation (t/km2) | ||
| 1986 year | 2000 year | 1986 year | 2000 year | ||||
| 25 | Forest | 418.5 | 415.25 | −3.25 | 4473.3 | 4859.8 | +386.5 |
| Grass | 104.25 | 91.5 | −12.75 | ||||
| Sum | 522.75 | 506.75 | −16 | ||||
| 26 | Forest | 450.25 | 444.25 | −6 | 1916.4 | 2637.7 | +721.3 |
| Grass | 38.5 | 27 | −11.5 | ||||
| Sum | 488.75 | 471.25 | −17.5 | ||||
| 36 | Forest | 102.5 | 99.5 | −3 | 8057.8 | 7705.5 | −352.3 |
| Grass | 182.25 | 186.25 | +4 | ||||
| Sum | 284.75 | 285.75 | +1 | ||||
| 38 | Forest | 418 | 395.5 | −22.5 | 5749.3 | 6052.6 | +303.3 |
| Grass | 103 | 66.25 | −36.75 | ||||
| Sum | 521 | 461.75 | −59.25 | ||||
| 59 | Forest | 380.25 | 363 | −17.25 | 2321.2 | 2504.7 | +183.5 |
| Grass | 34.5 | 47.25 | +12.75 | ||||
| Sum | 414.75 | 410.25 | −4.5 | ||||