Abstract : A water–soil coupling model of channel fluid movement is established considering the interaction of gully bed erosion, slope confluence, and rainfall, which can provide theoretical basis for watershed risk assessment, disaster prevention and mitigation, and identification of potential debris flow gully. By analyzing the erosion process of the channel fluid on the movable solid source of the gully bed, and coupling it with the slope confluence and the rainfall over the channel with temporal
Keywords : Simulation Study, Fluid Movement Process, Gully Bed Based, simulation, study