摘要
在正交坐标系下，建立了能较好拟合长江口边界的平面二维潮流和全沙数学模型。应用１９９６年洪、枯两季大、中、小潮水文泥沙资料和１９９５年、１９９６年地形及８３１０和８６１５台风暴潮引起的南北槽淤积资料，对长江口的潮位、流速、流向、含沙量特别是南北槽的地形变化和航道回淤进行了验证，结果表明该全沙数学模型较好地复演了长江口流场、含沙量场和地形变化。
Based on the non equilibrium suspended load and bed load transport equations and the sediment transport capacity formula derived by Dou Guoren, a 2 D numerical model of total sediment transport in the Yangtze River estuary is established. In the model, the actions of tidal currents, wind waves and the effect of salinity on sediment transport are considered. It applies an automatically generated boundary fitted grid with orthogonal curvilinear coordinates. The verification of calculation shows the sediment concentration, the deformation of seabed and the silt in channel caused by tropical storm can be successfully simulated.
关键词
长江口
潮流
悬沙
底沙
数学模型
the Yangtze River estuary, tidal current, suspended load, bed load, numerical model
