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本文采用MIKE21二维水动力模型模拟了南黄海辐射沙脊群海域的潮流形态和含沙量,模拟结果与实测数据基本一致。在此基础上,模拟计算了围填海工程后辐射沙脊群海域的潮流和含沙量变化。结果显示工程对潮流和含沙量的影响主要出现在工程区附近。围填海工程使原本以弶港为中心呈扇形辐聚、辐散的潮流格局有所改变,形成东沙岛西侧南北向和高泥岛南侧东西向的两条潮流通道,并在一定程度上分割了条子泥南北两侧的水体。工程后含沙量的变化与平均流速的变化基本一致,在流速变大的东沙岛西北侧和高泥岛南侧海域,含沙量显著升高;在流速变小的条子泥南北两侧、东沙岛东侧及西南侧,含沙量显著降低。
In this paper, the MIKE21 two-dimensional hydrodynamic model was used to simulate the tidal current shape and sediment concentration of the radiated sand ridges in the southern Yellow Sea. The simulation results are basically consistent with the measured data. On this basis, the changes of tidal current and sediment concentration in the radial sand ridge area after the reclamation project are simulated. The results show that the impact of the project on tidal current and sediment concentration mainly occurs in the vicinity of the project area. The reclamation project changed the pattern of fan-shaped convergence and divergence that originally belonged to the port of Chuang to form two tidal current channels in the south-north direction of the east of Dongsha Island and the east-west direction of the south side of the Gaojidao Island. To a certain extent, Divide the water on both sides of the slime mud. After the project, the change of sediment concentration is basically consistent with the change of average flow rate. The content of sediment increases significantly in the northwestern side of Dongsha Island and the southern coast of Gao mud island where the velocity of flow increases. Dongsha Island east and southwest side, significantly reduced sediment concentration.