Table 6.
Criteria for geology ESP identification.
| Evaluation Factor | Standardized Value | Weight | ||||
|---|---|---|---|---|---|---|
| No Impact Area | Optimal ESP | Intermediate ESP | Basic Security Pattern |
|||
| Insensitive (1) | Mildly Sensitive (3) | Moderately Sensitive (5) | Sensitive (7) | Highly Sensitive (9) | ||
| Average annual rainfall (mm) | <1300 | 1300–1400 | 1400–1500 | 1500–1600 | >1600 | 0.15 |
| Slope (°) | <5 | 5–15 | 15–25 | 25–35 | >35 | 0.1 |
| Elevation (m) | <200 | 200–500 | 500–800 | 800–1000 | >1000 | 0.1 |
| Curvature | −0.5–0.5 | (−1.5, −0.5], [0.5–1.5) | (−2.5, −1.5], [1.5–2.5) | (−3.5, −2.5], [2.5–3.5) | (−∞,−3.5], [3.5, ∞) |
0.1 |
| Soil type | Paddy soil Calcareous soil |
Saline soil Sandy soil Meadow soil Limestone soil |
Lateritic soil | Yellow soil Yellow–red soil Rhogosol Lithosol |
Purple soil | 0.1 |
| Normalized difference vegetation index (NDVI) | <0.55 | 0.4–0.55 | 0.25–0.4 | 0.1–0.25 | <0.1 | 0.1 |
| Land cover | Construction land Waterbody Wetland |
Forest Natural grassland Improved grassland |
Irrigable land Dryland Garden plot |
Artificial grassland Wild grassland Saline–alkali land |
Slash land Bare land Sandy land Gravel land |
0.1 |
| Distance to major road (m) | >5000 | 3000–5000 | 1500–3000 | 500–1500 | <500 | 0.1 |
| Geological hazards number (per 25 km2) |
<2 | 2–4 | 4–6 | 6–8 | >8 | 0.15 |