Coupled modeling of bed deformation and stability analysis on a typical vulnerable zone on the Ningxia reach of the Yellow River during flood season

Abstract The Ningxia reach of the Yellow River (NRYR) is wide and shallow, instability damages are likely to occur at its vulnerable zone. In this study, based on one‐dimensional hydro‐sediment dynamics, two‐dimensional dynamics zone stability analysis model, a coupled model was established analyze scouring risk zones in NRYR during flood season. Considering morphological change bank slope caused by flow erosion, seepage typical spur dyke protection embankment under water level fluctuation conditions analyzed. To fully reflect effect sediment, intensity index α proposed. A significant increase will result toe scouring, while decrease lead silting toe. probability failure for greater recession period. Compared with influence river season, slip more sensitive erosion.