镇江市合流制管网溢流污染源解析

为了解合流制管网溢流污染特征,在镇江黎明河溢流口采集水样进行水质检测,并对检测结果变化规律与相关性进行分析.结果表明:随降雨历时,SS的浓度变化范围为112～286 mg/L与1430～4320 mg/L,COD的浓度变化范围为61～121 mg/L与178～728 mg/L,且均会出现初期冲刷现象；二者的线性相关系数...

Analysis of Combined Overflow Pipe Pollution of Zhenjiang

To understand the characteristics of overflow pollution of combined piping network,water samples were collected from the overflow of Liming River in Zhenjiang to test the quality,and results variation as well as correlation was analyzed.Results indicated that with the rainfall,the concentrations of SS varied from 112 to 286 mg/L and 1 430 to 4 320 mg/L,concentrations of COD varied from 61 to 121 mg/L and 178 to 728 mg/L,moreover both of them appeared first flush phenomenon.There is a certain correlation between SS and COD,with their linear correlation coefficients as 0.477 and 0.640 1 respectively.Concentrations of NH3-N varied from 23.5 to 26.8 mg/L and 5.06 to 10.6 mg/L,and concentrations of TP varied from 2.37 to 3.76 mg/L and 3.43 to 9.83 mg/L.In the case of large rainfall intensity,with the rainfall,both of their concentrations would drop continuously,but their correlation coefficient could achieve 0.953 8.Correlation of SS and COD,NH3-N and TP may provide some advising for overflow pollution control technology.