*3.1. Post-Failure Behavior*

The triggering of landslides was mainly from snow infiltration, which turn into long runout and rapid landslides, constitutes a typical disaster model in the loess area. The Panjinbulake landslide belongs to this typical geologic hazard model. Following the instability failure of the landslide, the front loess main body slipped due to the river flushing action. Pore-water pressure increased and soil saturation during the sliding process because of the snow infiltration. The landslide was transformed into debris flow, showing a flow state. Then, the landslide volume increased gradually with entrainment effects and flowed into the Pliqinghe Gully. Finally, the landslide struck the opposite side of the mountain and stopped.
