Revista de Geografía y Desastres Naturales
Acceso abierto

abstracto

Investigation on the Dropping Slope Sector Formation and its Associated Geohazard Risks

Jiagui Zhang*

Dropping slope sectors are a sub-stable slope type which abundantly exists in mountainous regions. They develop through a deep hydrogeological process. Under strong exogenic geological down-cutting conditions, stresses are unloaded onto the slope rock mass, which then becomes loose and can be penetrated by rainwater. The rainwater in the slope rock mass congregates along the water table. The rock mass around the water table is argillized and then compressed due to the gravity from the upper part. The upper part drops gradually as the rock mass is compressed. In the slope rock mass with even structures dropping slope sectors exhibit in a fan-like shape with a backward curve trench on its back. Dropping slope sectors may be vulnerable to deformation, collapse, and landslide, particularly when a strong earthquake occurs. Numerous types of structures suffer from this type of geohazard risk. The three parallel rivers region is the key research region in this study.