Author(s): Yin Chen, Yan-Gui Wang
Linked Author(s): Yin Chen
Keywords: Collapse-retreat, lateral erosion rate, sinking-slipping failure, sinking-toppling failure, falling failure
Abstract: In order to study and simulate the lateral evolution of alluvial river, the theories of riverbank erosion and stability are used to get the mode of riverbank scour-collapse-retreat (RSCRM) and the rate of riverbank collapse-retreat in this paper. Based on the mechanism of the riverbank collapse-retreat and the different scour process after the riverbank collapse into the water, this paper proposes three kinds of analysis modes, the RSCRM of sinking-slipping failure, the RSCRM of sinking-toppling failure and the RSCRM of falling failure. According to lateral erosion and bank collapse in riverbed evolution, this paper discusses the structure of formula for the average riverbank collapse-retreat rate of alluvial river, and analyzes the main factors that affect the channel collapse-retreat, which are the intensity of the water flow and the properties of the soil. In addition, the calculation method of relevant parameters for three kinds of analysis modes is proposed and tested with measured data from the Yangtze River
Year: 2017