NUMERICAL MODELING ON WAVE-CURRENT FLOWS AND BED SHEAR STRESSES OVER AN ALGAL REEF

Currents in coastal zones under mechanisms in terms of tides, waves, wind, and high roughness are difficult to model; bed shear stresses under wave-current flows are particularly challenging yet not being well studied. In this study, the performance of a numerical modeling on depth- averaged currents and bed shear stresses over an algal reef was examined using a coupled wave-current model (Delft-3D). The detailed methodology is described in Lan and Huang (2023). The aims of this study are (1) to understand the performance of the existing model to predict the bed shear stress, and (2) to explore how the wave-current interaction affects the bed shear stress on the reef.