多污染源随机排污的水质影响分析方法及其应用

Method for assessing the impact of multiple randomly discharging pollutant sources on river water quality

针对污水排放特征,将污染源分为连续排放型污染源和间隙排放型污染源。对连续排放型污染源,采用确定性方法定义污染源强;而对于间隙排放型污染源,运用不确定性理论,根据其排放污染源的随机统计特征,对污染源进行随机概化。将不确定性理论应用于多污染源随机排污对环境水体的水质影响分析,给出了基于不确定性理论的水质影响预测方法,建立了二维随机水质数学模型。并将该方法应用于某市水源地水质影响的随机分析,得到了在多污染源随机排放协同影响下水质浓度随机变化的统计特征。

The pollutant sources of are divided into two kinds： continuous discharging type and intermittence discharging type. The pollution intensity of the first kind of discharging source is definite by the certainty method. Whereas, for the second type the discharge must be generalize according to its randomly statistical characteristics based on the uncertainty theory. In this paper, the uncertainty theory is applied to analyzed the impact of multiple random pollutant sources on river quality and establish the 2- D random mathematical model for predicting the water quality in river. The model is used to analyze the pollution of the water source of a city, located at the downstream of Yangtze River, affected by multiple random pollutant sources.