Erosion Mechanisms of Debris Flow on the Sediment Bed

Debris flows are common geological hazards in mountainous regions worldwide. The scale of debris can be significantly enhanced by basal erosion and bank collapse the transportation process, resulting an increase casualties property losses. However, mechanisms this growth largely unclear. Here, we conduct a series experiments to investigate two different bed sediments (coarse-grained widely graded) released with three densities volumes. revealed comparing detailed sensor data for flow level, pore pressure total normal stress. A nose develops on coarse-grained sediment, high depth low velocity, while tabular graded leading velocity. mean rates sediment generally higher than those due significant developed sediment. feedback effect process strongly influences which turn affects rate interaction between overlying controls pattern: is eroded layer mass movement whereas progressively scoured. during principally attributed pore-pressure transmission.