河网水质模型及其数值模拟

本文研究了河网水质数学模型．该模型不仅反映了网状河道中非稳态的水流及水质变化特点，还反映了水体分别处于好氧、缺氧、厌氧状态下的水质及底泥中主要污染物的变化规律．模型中的参数都是在分析机理的基础上通过实验室和现场实验得到的．文中还研究了模型的动态耦合数值计算方法，应用实际资料验证模型，取得良好的结果．本模型已用于为改善无锡河网水质而进行的水量、水质调控方案的研究中．

Water Quality Model for River Network and Numerical Simulation

Water quality model for the river network has been studied in this paper.The unsteady model with multiparameter reflects the characteristics of the unsteady flow in different directions and that of the unsteady water quality under aerobic,anoxic and anaerobic conditions.The model includes the various equations for DO,COD,BOD_5,NBOD,and NH_4~+-N.All the parameters in the model have been obtained from field observations and experiments.The computing method of dynamic cou- pling of the model has also been studied.Using the data observed for the river network of Wuxi City, the model has been verified.The model has been applied to the program of controlling water quantity and water quality in order to improve the water quality of the river network of Wuxi City.