Table 1 Ecological resistance evaluation system
Primary factor | Secondary factor | Grade | Ecological resistance | Economic resistance |
|---|---|---|---|---|
Land-cover type | Land-use type | Urban land, rural settlement, other construction land | 9 | 1 |
Beach, saline-alkali land, bare land | 7 | 3 | ||
Paddy field, dry land, | 5 | 5 | ||
Sparse forest, other woodland, canal, medium coverage grassland, marsh | 3 | 7 | ||
Forestland, high coverage grassland, lake, reservoir, bush, | 1 | 9 | ||
Terrain factor | Elevation (m) | 0–100 | 1 | 1 |
100–150 | 3 | 3 | ||
150–200 | 5 | 5 | ||
200–250 | 7 | 7 | ||
 > 250 | 9 | 9 | ||
Slope (°) | 0–3 | 1 | 1 | |
3–9 | 3 | 3 | ||
9–18 | 5 | 5 | ||
18–27 | 7 | 7 | ||
 > 27 | 9 | 9 | ||
Hydrological factor | MNDWI |  < 0 | 9 | 1 |
0–0.22 | 7 | 3 | ||
0.22–0.6 | 5 | 5 | ||
0.6–0.8 | 3 | 7 | ||
 > 0.8 | 1 | 9 | ||
Vegetation cover | NDVI |  < 0 | 9 | 1 |
0–0.2 | 7 | 3 | ||
0.2–0.33 | 5 | 5 | ||
0.33–0.6 | 3 | 7 | ||
 > 0.6 | 1 | 9 | ||
Density factor | Road network density |  > 1.25 | 9 | 1 |
0.85–1.25 | 7 | 3 | ||
0.52–0.85 | 5 | 5 | ||
0.20–0.52 | 3 | 7 | ||
0–0.20 | 1 | 9 | ||
Settlement density |  > 0.80 | 9 | 1 | |
0.60–0.80 | 7 | 3 | ||
0.40–0.60 | 5 | 5 | ||
0.20–0.40 | 3 | 7 | ||
0–0.20 | 1 | 9 |