摘要
近年来分流制雨水管道溢流污染日益严重,导致城市受纳水体水质恶化。文章以某混接分流制排水系统为研究对象,研究混接雨水管网排放污染特征,并建立预测雨天泵站放江污染负荷的经验公式。结果表明:雨天泵站放江污染物浓度大于旱天泵站放江污染物浓度,且随着降雨量的增加,COD和SS浓度由于冲刷效应而增大,而NH_(3)-N浓度由于稀释效应而减小。此外,COD、NH_(3)-N、SS污染负荷量与放江持续时间、流量、前期晴天数、峰值流量存在不同程度的相关性,基于线性拟合方程能够准确预测泵站放江污染负荷量。
In recent years,wet-weather discharge from separate storm drains has become increasingly serious,which leads to deterioration of receiving water bodies.In this paper,a separate drainage system with inappropriate sewage entries was investigated to determine the characteristics of wet-weather discharge,and the empirical formula was established to predict the pollution load of pumping discharge in wet weather.The results show that the concentration of wet-weather discharge is higher than dry-weather discharge.With the increase of rainfall,the concentration of COD and SS increases due to scour effect,while the concentration of NH 3-N decreases due to dilution effect.In addition,pollution loads of COD,NH_(3)-N and SS are correlated with discharge duration,discharge flow,antecedent dry-weather days and peak discharge flow.The linear fitting equation can accurately predict the discharge pollution loads of pumping stations.
作者
王静怡
Wang Jingyi(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)
出处
《环境科学与管理》
CAS
2022年第3期84-87,92,共5页
Environmental Science and Management
关键词
泵站放江
污染特征
初期冲刷
放江污染预测
pumping discharge
pollution characteristic
first flush effect
pollution discharge forecast
