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根据实测资料分析了长江口的盐水入侵问题。采用调和常数得到外海控制潮位,用流量控制上游边界,建立了长江口、杭州湾及邻近海域正交曲线坐标系下的二维潮流和盐度数学模型。模型验证了长江口洪、枯季时大、中、小潮的潮位、流速、流向和盐度,较好地模拟了口外顺时针旋转流和口内往复流的特征,反映了外海盐水入侵和北支盐水倒灌的运移特性。在此基础上对长江口综合整治规划方案进行了研究,讨论了整治工程对减轻长江口盐水入侵的作用。
Based on the measured data, it analyzes the saltwater intrusion in the Yangtze Estuary. By using the harmonic constants to obtain the tidal level in the open sea, the upper boundary of the upper reaches of the Changjiang River, the Hangzhou Bay and the adjacent sea areas are established by using the flow control upstream boundary. The two-dimensional tidal current and salinity mathematical models are established. The model validates the tidal level, velocity, flow direction and salinity of the large, medium and small tidal flames at the Yangtze Estuary during floods and dry seasons, and better simulates the characteristics of clockwise and countercurrent flow outside the mouth and in-mouth reciprocating flow, Saline Infertility. On this basis, the Yangtze Estuary comprehensive renovation planning program was studied to discuss the remediation project to mitigate the Yangtze River Estuary intrusion.