Remote sensing and GIS‐based statistical analysis of the spatial distribution of 10 310 large landslides in the eastern margin of the Qinghai‐Tibet Plateau

The eastern margin of the Qinghai‐Tibet Plateau is one of the most frequent areas of landslide disasters in the world. The study of the spatial distribution pattern of landslides in this region is crucial for understanding the causes of geologic hazards and developing effective strategies for disaster prevention and mitigation. Based on remote sensing images, the most detailed database of large landslides in the eastern margin of the Qinghai‐Tibet Plateau (101°E–103.5°E, 28.5°N–33°N) has been constructed so far. A total of 10 310 large landslides with an area larger than 1 × 10 5 m 2 and a total area of 3983.97 km 2 were identified. The maximum vertical height drop ( H ) of the landslides has a power–law relationship with the maximum horizontal distance of movement ( L ). Based on the geographic information system (GIS) platform, the correlation between the spatial distribution of large landslides and the influencing factors was analysed. The results show that the large landslides in the study area are mainly distributed in areas with an elevation of 1000–2000 m, slope of 20°–30°, vegetation coverage of 30%–40%, Triassic and Silurian strata, average annual rainfall of 1100–1300 mm and TWI of 8–10. The closer to faults, rivers and roads, the more likely landslides are to occur. This study systematically reveals the spatial development patterns of large landslides in the eastern margin of the Qinghai‐Tibet Plateau, and the results can provide important support for landslide susceptibility mapping and risk prediction in the region.