Abstract
This paper presents a new 3D tidal current model that can compute the wetting and drying bed in the tidal flats due to tidal motion. The governinge quationsa re derivedf rom 3D Navier Stokes equations. The governinge quations are solved using the fractional step method, combing the finite difference method in the horizontal plane and the finite element method in the vertical plane. First, in order to investigate the performance of the presentedm odel, a model test associated with the artificialt idal flat surroundedb y breakwatersis carriedo ut. Secondly, the tidal current with the wetting and drying bed in the shallow water around a small fishing port in the field site is simulated. Finally, the applicability of the presented model is discussed.
