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NUMERICAL STUDY OF NONLINEAR INTERACTION BETWEEN STORM SURGE AND TIDE IN SHANGHAI COAST

Duan Yihong; Qin Zenghao(Shanghai Typhoon Institute, Shanghai 200030)  
By using both two-dimensional nonlinear storm surge mode1 and water level model comprising the nonlinear interaction of tides with storm surges (T-S),the nonlinear T-S interaction in Shanghai coastal region for eight storm surge process indueed by the tropical cyclone of different tracks are numerically analysed in this paper. It is shown that a substantial improvement to the numerical simulation of the set-up and water level will be acheived when the nonlinear T-S interaction is taken into account.The nonlinear bottom friction plays an most important role in controlling the nonlinear T-S interaction and both nonlinear shallow water and momentum advection terms contribute considerably to the nonlinear T-S interaction as well.
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