The Numerical Simulation of Characteristics of Tidal Wave Propagation in Yangtze Estuary

Using the finite volume method, a 2D tidal mathematic model from Datong to open sea is developed to study the Yangtze estuary.On the basis of good verification, the characteristics of tidal wave propagation, such as tidal level, tidal range, harmonic constants, the relationship between tidal level and tidal current etc., are analyzed in Yangtze estuary using the mathematical model.The research indicates that semidiurnal component tide is dominant in Yangtze estuary, and the changing of M2 amplitude coincides well with the changing of tidal range.The property of advancing wave is strengthened gradually from Niupijiao station to tidal current limit(near Jiangyin station).