大型潮汐河网水质动态模拟及应用

The Dynamic Simulation of Water Quality for Large-scale Tidal River Networks and Its Application

所有水质方程表述成通用形式并利用有限体积法(FVM)将方程在河道和汊口离散成一系列线性代数方程,同时在对汊口离散过程中给出了一种汊口处理的新方法,然后应用荷兰水力学家Dronkers在水动力学模型求解中首先提出的分级思想建立了一种适于河网水质动态模拟的分级求解程式,最后,本文所提出的方法应用于工程实践从水质保障的角度为广州市南部供水工程选取最佳取水点。

All of the water quality equations are taken into an uniform form and discretized on both river channels and nodes by FVM (finite-volume-method) into a series of linear algebraic equations. In the meantime, a new approach to cope with node simulation is also given. The hierachy philosphy first put forward to solve hydrodynamic models by Dronkers, a Holand hydraulics specialist, is applied to establish a hierachy-solving scheme for the dynamic simulation of water quality for river netwoks. Finally, an application to choose the best site for the southern water-supplying engineering project of Guangzhou City from the point of views of water quality guarantee is demostrated by the method developed in this paper.