Author(s): Li Xi
Linked Author(s):
Keywords: Topography change; Sediment-loaded flow; Boussinesqequation; Wave transformation; Shoreline; Viscosity coefficient
Abstract: In this paper, a new expression about sediment-loaded flow is given to predict the topography change under wave climate. The sediment transport and wave induced hydrodynamics are solved separately, which is more convenient to predict long-term beach evolution than solving a coupled equation. A total sediment transport rate is created based on filed survey and experiments. In applying the sediment transport equation to wave model, the topography change is considered to give a new bathymetry as input for the wave equations, which in return will give a time-dependent hydrodynamic environment. The wave transformation including wave breaking is simulated by solving Boussinesq-type wave equations, together with some verification and comparison of computational results with measurements in a physical model (BERKHOFF et al. 1982). The longshore currents due to eddy viscosity is simulated by the model under uni-directional waves, which have been applied in erosion control of reclaimed land by headland breakwaters. The shoreline is found in equilibrium by headland breakwaters and the equilibrium process is simulated with comparison to the engineering practice in East Coast of Singapore.
Year: 2001