Erosion Rate of Lateral Slope Deposit Under the Effects of Different Influencing Factors

Lateral slope deposits along a channel represent an important source of material for initiation and development debris flows/floods that are typically observed in many headwater tributaries. This study found the failure process such deposit reflects combined interaction between external hydrodynamic factors (inflow discharge slope) internal (compactness fine particle content). The erosion comprises two stages: runoff toward toe body soil owing to gravity. Spatially, rate is distributed unevenly across deposit; highest value occurs at section close middle deposit, on upstream face. Temporally, decreases exponentially. Overall, average (increases) with bulk density slope). However, 7 threshold which tendency relation content differs. In comparison other three influencing factors, effect much smaller. Although imposes most significant effect, it same order as both inflow slope. As can be summarized repeated scouring failure, entrainment by runoff, we proposed calculation method total time required complete lateral process, validation suggested its reasonability. findings this enhance understanding mechanism could help improve runoff-induced flood forecasting regions mountainous catchments.