Table 1 Landslide causal factors with their classes and quantitative value.
Factors | Classes | Value | Factors | Classes | Value |
|---|---|---|---|---|---|
Lithology | Weak-semi-hard | 1 | Profile curvature | −58.61–8.89 | 1 |
thin-medium | −8.89–0.53 | 2 | |||
phyllite | −0.53–0.12 | 3 | |||
schist | −0.12–9.50 | 4 | |||
slate | 9.50–47.51 | 5 | |||
metamorphic | Plan curvature | −51.17–17.39 | 1 | ||
sandstone | −17.39–5.03 | 2 | |||
Hard-semi-hard | 2 | −5.03–0.50 | 3 | ||
medium-thick layered limestone | −0.50–8.98 | 4 | |||
Dolomitic limestone | 8.98–53.88 | 5 | |||
dolomite | Slope (degree) | 0–12.97 | 1 | ||
debris | 12.97–21.84 | 2 | |||
21.84–29.34 | 3 | ||||
Loosely packed soil | 4 | 29.34–37.88 | 4 | ||
Hard-thin layered quartz sandstone | 5 | 37.88–87.01 | 5 | ||
siltstone | Aspect | North | 1 | ||
conglomerate | Northeast | 2 | |||
mudstone | East | 3 | |||
Rainfall (mm) | 0–500 | 1 | Southeast | 4 | |
500–800 | 2 | South | 5 | ||
800–1000 | 3 | Southwest | 6 | ||
1000–1200 | 4 | West | 7 | ||
>1200 | 5 | Northwest | 8 | ||
Seismic intensity | VII | 7 | Distance to faults (m) | 0–100 | 1 |
VIII | 8 | 100–200 | 2 | ||
IX | 9 | 200–300 | 3 | ||
X | 10 | >300 | 4 | ||
Landform | Middle-low mountains | 1 | Distance to rivers (m) | 0–100 | 1 |
Middle mountains | 2 | 100–200 | 2 | ||
High-middle mountains | 3 | 200–300 | 3 | ||
Elevation (m) | 491–922 | 1 | >300 | 4 | |
922–1253 | 2 | Distance to roads (m) | 0–100 | 1 | |
1253–1671 | 3 | 100–200 | 2 | ||
1671–2245 | 4 | 200–300 | 3 | ||
2245–3794 | 5 | >300 | 4 |
