Numeric Solution To 1D Unsteady Flow Applied In CaoE River

The hydraulic method, which is numeric solution to 1D unsteady flow will be applied in water level prediction of CaoE river in this paper. Saint-Venant equations will be solved with finite difference method, which presents a numerical method for water level simulation of tidal rivers. Taking into account the big change of cross-section in CaoE river. A morphological factor well be introduced. The validation result shows that with this method resolution problem of calculated water level resulting from morphological can be well solved. Comparison of computed and field data also shows that the hydraulic method may achieve good results in the prediction for water level of CaoE river. The computed results will be used to compare with forecasting results from Massikigen method., which shows that the hydraulic method for 1D unsteady flow may gain better prediction results for tidal rivers than hydrological method.Nevertheless, this paper will present post process to validation results for users convenience, which makes forecasting and validation results much easier and more transparent. This method is practicable and efficient to solve problems in real water regime predictions, which eventually makes a positive sense to flood prevention and presents a method for water regime predictions of tidal rivers.