Dynamic Characteristics and Changes of Tidal Current in the Liezikou Sea Area, Lianyungang

In order to study the dynamic characteristics of the tidal current and its response to the surrounding coastal engineering in the Liezikou sea area, Lianyungang and to provide a reference for controlling the siltation under the Liezikou gate, a numerical model is established based on the finite volume method for two-dimensional shallow water equations and then calibrated and verified by using measured hydrological data. By using this model the dynamic characteristics of the tidal current in the Liezikou sea area and its changes after constructing the breakwater at Xuwei Port and the guide levee at Guanhe River mouth are analyzed. The simulation results indicate that the change of the tidal current dynamics is significant after the engineering constructions, which include changes in the direction of rising and falling currents and the decreases in the average velocity of both rising and falling currents, being the nearer the distance away from the engineering area the greater the change in current velocity. The weakening of tidal current power will aggravate the siltation under the upstream tide gate, which will make the drainage become poor in the Liezikou area and the flood risk increase in the Yibei region. Therefore, the relevant departments should take measures timely to ensure the drainage is smooth in the Liezikou area.