Progressive analysis of the progressive failure process of accumulated bank slope under dynamic water scour

Objective In the southwest region of China, where canyons are deeply incised and water flows are turbulent, disasters frequently occur. The accumulated masses are widely distributed, and understanding the mechanisms and evolutionary processes of riverbank slopes composed of these masses under dynamic water scour, such as dam collapses and reservoir flood discharge, is of significant practical importance for hydropower, road construction, and urban development. Methods Building upon previous research, this study qualitatively analyzes the progressive deterioration of riverbank slopes under flood conditions. The development mechanisms of erosion grooves on both straight and concave riverbank slopes under dynamic water scour are theoretically derived. Furthermore, the multistage sliding process of the Ganhaizi landslide in Danba County, triggered by rising water levels, was simulated using Geo-studio software. Results A function describing the extent of erosion in straight riverbank slopes over time, considering