## 3 Study Area and Data
### Database Preparation and Analysis
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Environmental** & **Classes** & **\% Class** & **\% Landslide** & **FR** \\
**Factors** & **Classes** & **Pixels** & **Pixels** & **FR** \\ \hline \multirow{6}{*}{Profile curvature} & \(<\)\(-\)1 & 5.79\% & 4.08\% & 0.704 \\  & \(-\)1\(\ldots\)\(-\)0.5 & 11.26\% & 7.31\% & 0.649 \\  & \(-\)0.5\(-\)0 & 32.99\% & 29.74\% & 0.901 \\  & 0–0.5 & 32.04\% & 33.33\% & 1.040 \\  & 0.5-1 & 12.00\% & 17.75\% & 1.479 \\  & \(>\)1 & 5.91\% & 7.79\% & 1.319 \\ \hline \multirow{6}{*}{Land cover} & Flowland & 42.47\% & 46.64\% & 1.098 \\  & Forest & 43.60\% & 38.01\% & 0.872 \\  & Grass land & 6.76\% & 10.31\% & 1.526 \\  & Wetland & 0.23\% & 0.12\% & 0.527 \\  & Water body & 0.90\% & 0.12\% & 0.133 \\  & Artificial surface & 6.02\% & 4.80\% & 0.797 \\  & Bare land & 0.03\% & 0.00\% & 0.000 \\ \hline \multirow{6}{*}{Lithology} & The lithology of the strata is predominantly composed of & & & \\  & anddesite, with minor occurrences of basaltic andesite, hylolite, & 17.61\% & 26.62\% & 1.511 \\  & and volcanicalic rocks. & & & \\ \cline{1-1}  & The lithology of the strata mainly consists of shale, sandstone, & 5.39\% & 8.63\% & 1.601 \\ \cline{1-1}  & The primary lithologies consist of clay, silty clay, clayey silt, & & & \\ \cline{1-1}  & and loess, with the presence of alluvial sand and gravel layers & 11.87\% & 6.00\% & 0.505 \\  & at the base. & & & \\ \cline{1-1}  & The lithology of the strata comprises shallow metamorphic & & & \\ \cline{1-1}  & elastic rocks interbedded with carbonate rocks, characterized & 1.07\% & 4.44\% & 4.158 \\ \cline{1-1}  & by carbonaceous material, intercalated coal seams, and & & & \\ \cline{1-1}  & interbedded coarse-grained (basalatic) rocks. & & & \\ \cline{1-1}  & The lithology of the strata primarily consists of gneiss, schist, & & & \\ \cline{1-1}  & amphibolite, and phyllite, intercalated solid marble and & 4.35\% & 4.20\% & 0.965 \\ \cline{1-1}  & The lithology of the strata is predominantly composed of & & & \\ \cline{1-1}  & limestone. It includes chert-banded limestone and limestone & 5.00\% & 3.48\% & 0.695 \\ \cline{1-1}  & containing interbedded chert. & & & \\ \cline{1-1}  & The lithology comprises silty clay, clayey silt, and & & & \\ \cline{1-1}  & sandy gravel. & 7.88\% & 2.76\% & 0.350 \\ \cline{1-1}  &... &... &... &... \\ \hline \multirow{6}{*}{TWI} & \(<\)5.0 & 34.17\% & 36.45\% & 1.067 \\  & 5.0–7.5 & 46.91\% & 43.29\% & 0.923 \\ \cline{1-1}  & 7.5–10.0 & 11.93\% & 10.55\% & 0.885 \\ \cline{1-1}  & 10.0–12.5 & 4.45\% & 5.88\% & 1.321 \\ \cline{1-1}  & 12.5–15.0 & 1.62\% & 2.64\% & 1.626 \\ \cline{1-1}  & \(>\)15.0 & 0.91\% & 1.20\% & 1.311 \\ \hline \multirow{6}{*}{Distance from river} & 0–500 m & 9.60\% & 13.55\% & 1.411 \\  & 500–1000 m & 8.39\% & 8.99\% & 1.071 \\ \cline{1-1}  & 1000–1500 m & 7.81\% & 7.91\% & 1.014 \\ \cline{1-1}  & 1500–2000 m & 7.33\% & 8.15\% & 1.112 \\ \cline{1-1}  & 2000–2500 m & 6.84\% & 7.31\% & 1.070 \\ \cline{1-1}  & \(>\)2500 m & 60.03\% & 54.08\% & 0.901 \\ \hline \multirow{6}{*}{Distance from faults} & 0–1000 m & 10.74\% & 12.71\% & 1.184 \\  & 1000–2000 m & 10.48\% & 9.83\% & 0.938 \\ \cline{1-1}  & 2000–3000 m & 9.75\% & 9.23\% & 0.947 \\ \cline{1-1}  & 3000–4000 m & 8.99\% & 10.19\% & 1.134 \\ \cline{1-1}  & 4000–5000 m & 8.11\% & 7.79\% & 0.961 \\ \cline{1-1}  & 5000–0000 m & 6.84\% & 6.47\% & 0.947 \\ \cline{1-1}  & 6000–7000 m & 5.78\% & 6.59\% & 1.141 \\ \cline{1-1}  & 7000–8000 m & 5.00\% & 4.44\% & 0.888 \\ \cline{1-1}  & \(>\)8000 m & 34.33\% & 32.73\% & 0.954 \\ \hline \multirow{6}{*}{Distance from road} & 0–200 m & 32.29\% & 54.08\% & 1.675 \\ \cline{1-1}  & 200–400 m & 23.40\% & 18.94\% & 0.810 \\ \cline{1-1}  & 400–400 m & 16.33\% & 10.07\% & 0.617 \\ \cline{1-1}  & 600–800 m & 10.93\% & 7.79\% & 0.713 \\ \cline{1-1}  & 800–1000 m & 7.01\% & 4.68\% & 0.667 \\ \cline{1-1}  & \(>\)1000 m & 10.03\% & 4.44\% & 0.442 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._Figure 4: Distribution of environmental factors.