河道疏浚整治期水质变化关联性及对策研究

Study on the Correlation and Countermeasures of Water Quality Changes During River Dredging and Regulation Period

在疏浚施工过程中,机械施工对水流、泥沙的扰动可能会对河流水质产生一定影响。在引江济淮工程中,“江淮沟通段”利用派河主河道作为输水路线,以蜀山下锚地至派河闸下锚地段河流为例,重点研究河道疏浚整治期水质变化关联性,通过分析,针对疏浚施工对派河水质产生的影响提出了解决方案。结果表明:单就疏浚施工期而言,对水质影响主要反映在悬浮物上,其他污染因子数值未见显著性增加大;派河中下游TN浓度在0.06~0.75 mg/g,平均值为0.47 mg/g,派河非黑臭水体,水质达标主控因子氨氮的底泥释放量有限。

In the process of dredging construction,the disturbance of water flow and sediment by mechanical construction may have a certain impact on the water quality of the river.Taking the river from the anchorage under Shushan to the anchorage under the Paihe Lock as an example,this paper focuses on the correlation of water quality changes during the dredging and rectification period of the river,and points out the impact of dredging construction on the water quality of the Paihe River and its solutions through analysis.The main conclusions are:in terms of the dredging construction period alone,the impact on water quality is mainly reflected in the suspended solids,and the values of other pollution factors do not increase significantly.The TN concentration in the middle and lower reaches of the Pai River was between 0.06~0.75mg/g,and the average value was 0.47mg/g.