Ecological factors | Evaluation standards | Classification | Evaluation value | Weights |
Slope gradient and length | The bigger the slope gradient and length is, the higher sensitivity of ecological construction | >25˚, <12 m | 5 | 0.250 |
5˚ - 25˚, 12 m - 60 m | 3 | |||
<5˚, >60 m | 1 | |||
Soil erodibility | The higher the soil erodibility is, the higher sensitivity of ecological construction | Sandy soil, clay | 5 | 0.250 |
Light loam | 3 | |||
Medium loam | 1 | |||
Surface runoff sediments | The more surface runoff sediment is, the higher sensitivity of ecological construction | Runoff and sediments collecting area | 5 | 0.100 |
Runoff and sediments source area | 3 | |||
Runoff and sediments formative area | 1 | |||
Soil and water loss | The more serious the soil and water loss is, the higher sensitivity of ecological construction | Serious | 5 | 0.150 |
General | 3 | |||
Slight | 1 | |||
Plants coverage | The more the plants coverage is, the higher sensitivity of ecological construction | <50% | 5 | 0.150 |
50% - 90% | 3 | |||
>90% | 1 | |||
Pollution | The more serious pollution is, the higher sensitivity of ecological construction | High | 5 | 0.100 |
Medium | 3 | |||
Low | 1 |