城市河网水系多参数水质系统模拟研究

近年来,随着城市水环境综合治理的进行,城市河网水环境的污染特征由有机类污染向富营养化污染发生转变。从污染组分的相互影响机理出发,利用物质守恒的基本原理模拟污染水体多参数水质组分的迁移转化规律,并且对水质模型中的各项参数进行了优化处理。以苏州市古城区应用为例,其水质模型验证结果为：CODMn计算值与实测值相对误差小于30%的点据占总点据的100%;氨氮计算值与实测值相对误差小于35%的为86.67%,研究结果说明经过参数优化处理的水质模拟系统能够较为精确地模拟城市河网水体的污染特征。

Study on the Multi-Parameter Water Quality Simulation in the River Network of Cities

In recent years,the city river network pollution has changed from organic pollution to eutrophic pollution.This paper is based on the relations of pollution component.And uses mass balance principle to simulate water quality parameters,furthermore it also optimizes the water quality parameters in the water quality model.The model was applied in the old city area of Suzhou.The validated results showed that the relative error between calculated data and measured data of CODMn was less than 30%.For NH3-N,86.67% of the relative errors were less than 35%.It indicates that the water quality simulation system is relatively accurate for simulating water pollution characteristics of city river network.