Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes

Local scour is a common threat to structures such as bridge piers, abutments, and dikes that are constructed on natural rivers. To reduce the risk of foundation failure, understanding local phenomenon around hydraulic important. The well-predicted depth can be used reference for structural design river management. Numerical simulation relatively efficient at studying these issues. Currently, two-dimensional (2D) mobile-bed models widely engineering. However, 2D model inadequate solving three-dimensional (3D) flow field because depth-averaged hypothesis. This causes predicted often underestimated. In this study, repose angle formula bed geometry adjustment mechanism integrated into improve numerical holes structures. Comparison calculated measured variation data reveals involving improvement technique predict hole spur with reasonable accuracy reliability.