Study And Application On Division Characteristics Of The Bifurcated Channel

The bifurcated channel is a common river type, and there exists realistic meaning for the study on the division characteristics of the bifurcated channel. In the past, more emphasis has been put on the flow pattern and the division ratio of water and sediment discharge. In order to study the division characteristics, a theoretic model is proposed in this thesis, which combines the plan configuration of channels with the minimum energy dissipation rate theory.In terms of the minimum energy dissipation rate theory, the division angle and deflection angle formulas are derived and applications with some topography data of the Pearl River Delta waterway are introduced.Finally, a 2-D flow model in the orthogonal coordinates is established. With the SIMPLEC algorithm, the flow equations are solved. The calculated distributions of water level and velocity well agree with field measurement. In addition, comparisons of numerical results with developed formula results have shown satisfactory agreements.