Table 3 Weighting of each index in the model

Vulnerability

Only link-based debris flow

Only link

0.2

Debris flow

0.2

Combined effect of only link and debris flow

Infinite

Accessibility

Time–Distance (min)

0–4

0.05

4–24

0.12

24–54

0.25

> 54

0.4

Complexity

Curvature

0–0.1

0.01

0.1–0.2

0.06

> 0.2

0.1

Gradient

0–0.03

0.005

0.03–0.05

0.02

0.05–0.08

0.05

0.08–0.11

0.08

> 0.11

0.1