利用坐标变换法建立了三维潮流盐度泥沙数值模拟 ,解决了复杂边界的处理问题 ,并应用于伶仃洋航道的整治研究中 ,取得了满意的结果。航道中的含沙量、盐度分布与现场实测很吻合 ,模拟计算得出的航道一期工程开挖后的淤积量与现场实测结果十分接近。 The numerical simulation of tidal current salinity and sediment was established by using the coordinate transformation method to solve the problem of complex boundary treatment. It was applied to the remediation research of Lingdingyang Channel, and satisfactory results were obtained. The sediment concentration and salinity distribution in the waterway are in good agreement with the field measurements. The siltation volume obtained after the excavation of the first-stage waterway project calculated by the simulation is very close to the field measurement.