Relationship Between Landslide Group and Local Structure on Right Bank of Shenyu River in Wudongde Hydropower Station

The Shenyu River, as the tributary of the Jinsha River closest to the Wudongde Hydropower Station, has had seven landslides developed on its right bank, forming an interconnected landslide group system. The evolution and future development trends of the landslide group have a significant impact on the safe operation of the Wudongde Hydropower Station. Using geological field surveys and exploration data, we studied and analyzed the formation mechanism of the landslide group on the right bank of the Shenyu River in the reservoir area of the Wudongde Hydropower Station. The main conclusions are as follows: The local structure of the study area is mainly composed of north–south faults and folds, which control the development of rock mass unloading in the later stage of the study area, the formation of the stepped landform in the study area, and the formation process of geological disasters in the study area. The synclinore (Bellmouth fold) structure on the southern flank of the Shenyu River controls the spatial distribution of geological disasters in the study area, forming a spatial distribution pattern centered on the Dapingdi landslide and Dacun landslide, with the scale of geological disasters decreasing toward both sides. The research findings contribute to the improvement of the theoretical system of the formation mechanism of geological disasters.