外秦淮河底泥释放对上覆水水质的影响

Effect of Boottom Studge Releasing in the Waiqinhuai River to the Quality of Upper Water

通过静态模拟实验,分析了外秦淮河底泥中释放出的与黑臭有关的DO、COD、NH3-N对上覆水水质的影响。上覆水中COD质量浓度是前4d呈下降趋势,至第11d基本稳定;NH3-N质量浓度是前4d呈上升趋势,至第11d趋于稳定;DO质量浓度是从开始实验时的7mg/L左右,很快下降至第11d的1mg/L以下才基本稳定。结果表明,外秦淮河底泥释放对上覆水水质有一定影响,并且这种释放有明显的梯度效应。

Effect of released DO, COD, NH3-N from bottom sludge in the Waiqinhuaihe River to te quality of upper water was studied with static simulation test. The COD's mass concentration of upper water was decreased in the former four days, and was stable to the eleventh day. For DO's mass concentration, it was decreased from the 7 mg/L in the beginning to 1 mg/L in the eleventh day, and was stable. The result indicated that the bottom sludge releasing had certain effect to the quality of upper water, and the gradient was obvious.