用逐步回归方法确定了青弋江芜湖段主要污染物之间的定量关系 .统计分析了COD随流量的变化规律 ,证明在 60m3/S流量 (顺流平均流量 )时污染浓度最高 . The quantitative relationship between main pollutants in Wuhu section of Qingyi River was determined by stepwise regression method, and the variation of COD with flow rate was statistically analyzed. It was proved that the highest concentration of pollutants was at 60m3 / S flow (co-current mean flow).