大型潮汐河网水质模型的求解方法及其应用

Solution of Large Tidal Channel Network Water Quality Model and its Application

用有限体积法（ＦＶＭ）对描述河流污染物运动规律的对流扩散方程积分，提出了一种处理潮汐河网汊道水质模拟的新方法；同时针对潮汐河网水质离散方程的特点建立了一种水质模型分级求解程式。实际应用表明：综合利用本文提出的汊道模拟方法及模型分级求解程式对于大型潮汐河网水质模拟不仅可以提高其模拟精度，而且具有极快的求解速度。

A new method for simulation of water quality in tidal channel network is put forward by integrating the dispersion equation for convection current describing the law of pollutants movement in river by use of FVM.According to characteristics of tidal channel network water quatity discrete equation, a formula of stage solution of water quality model is established. Practical application shows that this formula in combination with channel simulation method presented in this paper can raise the presision of large tidal channel network water quality simulation, but also the speed of solution.