Numerical modelling of the tide-induced residual current in the East China Sea

A two-dimensional.nonlinear numerical model is used to study the residual current generated by tides in the East China Sea (ECS) and the South Huanghai Sea (SHS). At first, the principal semidiurnal lunar tide (M₂) and the tidal current are derived in these areas. The results obtained with the model are strongly supported by the observational results available. Then, the tide-induced residual flow is determined by using the currents generated by the tidal input. The main features of the residual current in ECS and SHS are presented by analyzing the calculated results. Some of the problems are discussed such as the cause of generating residual current and the contribution of the residual current to the observed current.