基于水力模型的合流制溢流调蓄池运行效能评估  

Performance Evaluation for Storage Tanks Operation of Combined Sewer Overflows(CSO)Based on Hydraulic Model

作　　者：阎轶婧 YAN Yijing(Shanghai Municipal Engineering Design InstituteCo.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院〈集团〉有限公司,上海200092

出　　处：《净水技术》2020年第3期53-58,共6页Water Purification Technology

摘　　要：合流制溢流调蓄池是合流制系统控制溢流污染的有效手段,但受排水系统布置特殊性、水质水量传输规律复杂性、降雨的随机性等因素影响,通过基于截流倍数计算得到调蓄的设计规模,其运行效能难以通过理论计算校核控污效益。文中结合工程案例,借助水力模型,模拟设计调蓄池对不同强度降雨下的溢流污染控制过程,获得调蓄池溢流污染控制效能特性曲线。结果表明,新增调蓄池可显著削减20 mm以下小雨径流污染峰值和总量,全年可控制83%的降雨事件不发生溢流,溢流次数可降低至17次/年,年污染物削减率可达43%。研究成果可为合流制溢流污染调蓄池的设计提供指导反馈,可在实际工程中推广应用。Storage tank of combined sewer overflows(CSO)is an effective technology to alleviate CSO pollutions.However,due to the particularity of drainage system layouts,the complexity of water quality and quantity transmission process,and the randomness of rainfall,the operation performance of storage tanks,calculated by interception ratio,cannot be checked by theoretical calculation.Taking Kuihe River combined sewage storage tank as a research object,hydraulic model for drainage system(InfoWorks ICM)is used to evaluate the performance of overflows pollution control process of reservoir under different intensity rainfall.The characteristic curve of overflow pollution control efficiency of storage tank is built to assist evaluation.The results show that designed storage tank can significantly reduce pollution peak and total amount of pollution when rain runoff is below 20 mm.83% of rainfall events can be controlled without overflow during the whole year.The overflow events can be reduced to 17 times per year,and annual pollutant reduction rate can reach 43%.The research results can provide guidance and feedback for the design of CSO storage tank,and can be widely applied in practical projects.

关 键 词：合流制溢流 溢流污染 调蓄池 水力模型 效能评估 

分 类 号：TU992.0[建筑科学—市政工程]