| Summary: | 碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 98 === This article is based on mathematical models using De Saint Venant continuity equation, momentum equation and concentration routing problem to conclude the analytical of flow and concentration extension. After that, calculating with mathematical models to obtain more precise analytical. What’s more, using analytical to simulate the flow of different sections and the concentration spreading distribution of pollutants.
Substitution continuity equation and diffusion model equation into concentration routing problem to make it combine into a nonlinear partial differential equation. Since it is non-linear equations, which is extremely difficult to derive analytical from it. We have to substitution small perturbation into Kinematic Wave Model to linear the nonlinear part, and will reach the solution.
Linearized Analytical Method is applied to the actual flood routing and water quality. We can calculate and estimate the situation of flow and concentration-spreading against any sections, if the information of natural channel in all sections is complete and we are aware of the accurate upstream and concentration. This could be applied to the water quality renovation of rivers.
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