玉带溪流域合流制片区截污方案溢流污染特征分析  

Characteristics Analysis of Overflow Pollution of Different Sewage Interception Schemes in the Combined Area of Yudai River Basin

作　　者：刘海婷 邱依婷 韩冠宇 罗阝阳 聂玉玺 王丽娜 李麒崙 袁蒙蒙 LIU Haiting;QIU Yiting;HAN Guanyu;LUO Yang;NIE Yuxi;WANG Lina;LI Qilun;YUAN Mengmeng(North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300074,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《净水技术》2024年第S01期272-280,372,共10页Water Purification Technology

摘　　要：为明确玉带溪流域合流制片区不同截污方案的溢流污染特征及溢流控制效果,选择玉带溪北支上游合流制片区为研究区域,构建排水系统模型,在全年各等级降雨情景下,对合流制片区末端截污和截流式分流两种工程方案的合流制溢流污染特征指标进行对比研究。结果表明,截流式分流改造方案在溢流频次、溢流总量、溢流历时、溢流量均值、溢流量峰值和溢流污染负荷方面总体优于末端截污方案。其中,在全年各等级降雨情景下,末端截污方案的溢流量削减率为12.9%~77.5%,而截流式分流改造方案的溢流量削减率为40.6%~98.8%。在溢流污染负荷削减方面,降雨等级为中雨或大雨时,末端截污方案对3种污染物(化学需氧量、氨氮、总磷)的溢流污染负荷削减率均达到64%以上,而截流式分流改造方案的削减率均达到89%以上;降雨等级为暴雨及以上时,末端截污方案的溢流污染负荷削减率均小于50%,而截流式分流方案的削减率均达到60%以上。因此,通过溢流污染特征分析研究有利于掌握不同截污方案的污染物排放规律及溢流削减效果,对经济有效地控制合流制溢流污染具有指导性意义。In order to clarify the overflow pollution characteristics and overflow control effects of different interception schemes in the combined area of Yudai River Basin,the upstream area of the northern branch of Yudai River is selected as the study area,and a drainage system model is constructed.Under different rainfall levels throughout the year,a comparative study between end interception and interception diversion schemes of the combined area is conducted on the overflow pollution characteristics indices.The results show that the interception diversion scheme is generally superior to the end interception scheme in terms of overflow frequency,total overflow amount,overflow duration,average overflow flow rate,peak overflow flow rate,and overflow pollution load.Under different rainfall levels throughout the year,the overflow reduction rate of the end interception scheme is 12.9%to 77.5%,and of the interception diversion scheme is 40.6%to 98.8%.In terms of the overflow pollution load reduction,when the rainfall level is moderate or heavy,the end interception scheme has a reduction rate of more than 64%on the three pollutants(chemical oxygen demand,ammonia nitrogen,and total phosphorus),and the reduction rate of interception diversion scheme is as large as 89%;when the rainfall level is heavy and above,the reduction rate of overflow pollution load of the end interception scheme is less than 50%,and the reduction rate of the interception diversion scheme reaches more than 60%.Therefore,analyzing and studying the characteristics of overflow pollution is beneficial for mastering the pollutant discharge patterns and overflow reduction effects of different interception schemes,and has guiding significance for economically and effectively controlling combined overflow pollution.

关 键 词：合流制 末端截污 截流式分流 溢流特征 溢流削减 

分 类 号：TU992[建筑科学—市政工程]