But the three - dimension character is very clear to the flow filed of the yangtze estuary . a mature three - dimension estuary and coastal model ecom is used to simulate tidal current and residual field . the result shows the ecom model is used successfully to simulate the current field character of the yangtze estuary 由于长江口流场具有明显的三维特性，因此引进国际上比较成熟的三维河口海岸模型，结合长江口的实际情况对其中部分模块进行修改，应用该模型对长江口的潮、余流场进行准确的模拟。
