Authors: Mohamed Elhakeem, Thanos Papanicolaou
In this study, the 2D Finite Element Surface Water Modeling System (FESWMS) is used to design barb structures to mitigate river bank erosion in a stream reach located on the Raccoon River at Dallas County, Iowa, USA just upstream of the US Railroad Bridge R22. FESWMS is used also to access the barbs effect on the study reach. The model results showed that the proposed barb structures successfully reduced the flow velocity along the outside bank and increased the velocity in the center of the stream, thereby successfully increased the conveyance towards the core of the river. The estimated velocities and shear stress values along the river-banks where the barbs exist were within the recommended values for channel stability design. Thus, the barb structures were able to reduce the erosion along the bankline.
Keywords: 2D-Hydrodynamic models; river-bank erosion; Barb structures