## 4 Results
### The Relationship between Landslides and Influencing Factors  
In areas with significant differences in elevation, due to the large topographical variations, the resistance of soil to gravity decreases, accelerating water flow and increasing soil erosion and dissolution, making landslides more likely to occur [21]. The relationship between landslides and elevation is shown in Figure 5. The elevation range in the study area is from 267 to 4040 m, with an average elevation of 1685 m. The number of landslides within the elevation range of 0 to 1860 m reaches 142, accounting for 88.20% of the total number of landslides. Among them, the number of landslides within the elevation range of 861 to 1060 m is only 25, accounting for 15.53% of the total number of landslides. The number of landslides decreases significantly at elevations greater than 1860 m. Overall, most landslides occur within the elevation range of 0 to 1860 m, with the highest landslide number density occurring within the range of 0 to 660 m. LND gradually decreases with the increase in elevation. Figure 6 shows the relationship between landslides and slope angle. Slope angle refers to the degree of inclination of the ground and is an indispensable factor leading to landslide occurrences. It generally affects the stability of the slope through the magnitude and direction of the slope body stress, influencing surface runoff and material movement [22]. The results indicate that landslides are concentrated in the ranges of 10\({}^{\circ}\) to 30\({}^{\circ}\). The number of landslides within these ranges is 138. The slope range with the highest landslide number density is 30\({}^{\circ}\) to 40\({}^{\circ}\), followed by 40\({}^{\circ}\) to 50\({}^{\circ}\) and 20\({}^{\circ}\) to 30\({}^{\circ}\). Overall, the landslide number and LND are relatively low in the slope ranges of <10\({}^{\circ}\) and >50\({}^{\circ}\), while they are more triggered in the 10\({}^{\circ}\) to 30\({}^{\circ}\) range. Figure 7 shows the relationship between landslide distribution and slope orientation, and the statistical result shows that the highest number of landslide occurrences is in the SE direction, with 24, followed by 23 in the N and NW directions. The highest landslide number density occurs in the NE direction, followed by the SE and NW directions. No landslides occurred on flat terrain (\(-1^{\circ}\)). Figure 5: The relationship between landslide distribution and elevation map. The relationship between landslides and geological units is shown in Figure 8, and the results indicate that landslides are mainly concentrated in the Mesozoic, Paleozoic, and Precambrian, with 75, 42, and 41 landslides, respectively. Although the Precambrian, with the highest LND, covers only 210 km\({}^{2}\), landslides mainly occur in the Mesozoic and lower Paleozoic. The Mesozoic is mainly composed of Triassic mudstone and clay, with low mechanical properties of rock and soil mass, and it is sensitive to moisture content, making it prone to landslides. The lower Paleozoic is mainly composed of Ordovician shale, which shows higher mechanical properties of rock and soil mass compared to mudstone and clay, but shale is prone to developing fractures. When rainfall infiltrates, the mechanical properties will decrease, leading to a higher likelihood of landslides. The Paleozoic era, mainly composed of Permian basalt compared to mudstone, clay, and shale, has the highest mechanical properties and lower water permeability, resulting in a low occurrence probability of landslides. There are no landslides occurring in the Quaternary and Neogene. Figure 6: The relationship between landslide distribution and slope angle map. Figure 7: The relationship between landslide distribution and slope orientation map. Rivers also play a role in the development of landslides. When a river flows through a slope, the impact of the water flow can weaken the stability of the slope.