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This study is to investigate tidal wave propagation scattered byocean structure or topography in large regions. Based on a model equation derived by Tsay(1991), a finite elementnumerical model is developed. For waves with longer periods, thisequation shows the effects of the earth's rotation. For waves withshorter periods,it reduces to the mild- slope equation. Present numericalmodel incorporates Dirichlet's open boundary condition with the aim offield applications. The no-flux boundary condition is approximated in amore general way so that it could be applied to field cases. Results of present finite element method with Dirichlet's openboundary conditions are compared with Guao's(1995)analytical solutionsand numerical results of tidal waves.
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