|
| First-level indexes | Second-level indexes | Index description |
|
| Soil matrix quality, C1 | Volumetric weight of soil, C11 (g cm−3) | Refers to the mass of the soil per unit volume, reflecting the compactness of the soil |
| Total soil porosity, C12 (%) | Includes capillary porosity and noncapillary porosity, reflecting the soil’s ability to breathe and permeate |
| Organic matter content, C13 (g kg−1) | Refers to the amount of all carbon-containing organic compounds present in the soil |
| Duration of soil PWP, C14 (month) | Refers to the time that the soil moisture is reduced to the humidity of the soil when the plant begins to wither |
| Soil infiltration rate, C15 (mm h−1) | Refers to the amount of infiltration water per unit area of soil per unit time |
| Content of mineral nutrients, C16 (g kg−1) | Refers to the content of various trace elements, such as total N, available P, and available K, in the soil |
| Ability of soil to preserve moisture and fertility, C17 | Reflects the soil's ability to sustain moisture and fertility |
| Soil expansion and contraction, C18 | Refers to the ability of the soil to expand and contract through water absorption and dehydration |
|
| Vegetation community quality, C2 | Coverage of vegetation, C21 (%) | Ratio of the vertical projection area of vegetation (including leaves, stems, and branches) to the ground |
| Vegetation survival rate, C22 (%) | Represents the number of plants that survived as a percentage of the total planted |
| Incidence of pests and diseases in vegetation, C23 (%) | Refers to the percentage of vegetation with pests and diseases |
| Vegetation species richness index, C24 | Refers to the number of species in the community, reflecting the richness of vegetation species |
| Rationality of vegetation spatial collocation, C25 (%) | Reflects the biological characteristics of the vegetation population and the reasonable degree of intraspecies and interspecies coordination |
| Ability of vegetation to resist drought and heat, C26 | Reflects the ability of vegetation to resist low temperatures, heat, and drought |
| Vegetation tolerance to barrenness, C27 | Reflects the ability of vegetation to grow in soils that lack nutrients and water |
|
| Protective performance of slope, C3 | Slope resistance to leaching erosion, C31 | Refers to the ability of the soil matrix to resist the infiltration of water and leaching of soil nutrients |
| Antiscouring ability, C32 | Refers to the ability of the slope as a whole to resist mechanical damage and movement such as that of rain and runoff |
| Ability of slope to protect against wind and sand, C33 | Refers to the ability of slopes to maintain soil and water and prevent severe weather such as sandstorms |
| Slope resistance to natural disasters, C34 | Refers to the ability of the slope to resist natural disasters, such as mudslides, earthquakes, landslides, floods, and collapses |
| Ability of slope to prevent water and soil loss, C35 | Refers to the ability of the slope to resist damage to soil and land productivity under external forces |
|
