Abstract

In this paper, the natural conditions of Guan River are introduced. A 2-d tidal current mathematical model is established for the Guan river estuary. In this model, fine self-adaptive grid are employed to adapt to the complicated coastal and riverbank shape. The hydrodynamic equations in orthogonal curvilinear coordinates are used. Having been verified with measured data with regard to tidal level, current velocity and direction through the spring and middle tide the model could simulate current fields in the area. Then the mathematical model simulates the hydrodynamics affected by the navigation channel and guiding jetty established in the Guan river estuary. There are two types of schemes for the guiding-jetty project: one is single east guiding jetty, the other is the combined east and west guiding jetty. Its function is to guide flow and block sediment. The siltation after the dredging of navigation channel is an attention focus by engineers. In order to clarify the problem, this paper investigates the sediment source in this area and other related problems. Two methods are used to calculate the sedimentation rate. Finally, this paper predicts the sedimentation thickness for different projects. The results of the present work show that the future of the training project of Guan river estuary is bright.

Keywords: Guan river estuary, Mathematical model, Jetties, Navigation channel, Siltation