EROSION AND COLLAPSE OF RIVERBANKS UNDER DIFFERENT FLOOD CONDITIONS

Abstract

Stability of hypothetical riverbank subjected to five different flood hydrographs is discussed using the results of numerical simulation. Three models of hydraulic fluvial erosion, seepage flow, and slope stability are coupled to discuss the effect of the seepage flow and river bed deformation on riverbank stability. The three models are based on the finite element method with moving boundaries. The response of riverbank to the oscillated water level in the river and the consequent groundwater table is analyzed. The trend of factor of safety through time is presented. The influence of relevant geometrical, internal and external forces are also discussed.