基于雨水截流率的合流制改造措施研究
Study on combined flow system retrofitting measures based on stormwater interception rate
曹秀芹 1禹然 2洪国渊 2杨超3
作者信息
- 1. 城市雨水系统与水环境省部共建教育部重点实验室,北京 100044;北京建筑大学环境与能源工程学院,北京 100044
- 2. 北京建筑大学环境与能源工程学院,北京 100044
- 3. 北京城市排水集团有限责任公司,北京 100124
- 折叠
摘要
合流制溢流污染控制是中国当前城市排水系统(尤其是在密度大和改造难的老城区)所面临的一项急迫且艰巨的重要任务.为削减溢流污染且充分发挥原有设施的调控能力,建立一套经济可行的合流制改造措施至关重要.基于水环境容量,以雨水截流率作为污染控制指标,联合当量降雨强度确定截流调蓄总量,利用MIKE Urban的时间—面积模型构建某大城市老城区排水系统的水力水质模型,通过对截流、调蓄改造进行可行性与经济性分析,制定原有截流设施保持不变、增设水泵限流装置、新建4 mm降雨量调蓄池的改造方案.模拟改造后,雨水截流率由58.9％提高到85.3％,不仅简化了截流调蓄改造的计算,增强其普适性,还进一步提高了截蓄两者的联动性,在满足污染控制要求的同时更直观地体现溢流污染控制效果,对老城区更合理高效地开展合流制改造具有指导意义.
Abstract
The control of combined sewer overflow pollution was an urgent and challenging task faced by urban drainage systems in China,especially in densely populated and difficult-to-renovate old city areas.It was crucial to establish an economically feasible set of measures for retrofitting combined sewer systems to reduce overflow pollution and fully utilize the regulating capacity of existing infrastructure.Based on the water's environmental capacity,stormwater interception rate was used as a pollution control indicator,and equivalent rainfall intensity was combined to determine the total interception and storage capacity.A hydraulic and water quality model of the drainage system in a large old city area was constructed using the time-area model of MIKE Urban.Feasibility and economic analyses were conducted for the retrofitting of interception and storage,resulting in the development of a retrofit scheme that maintaining the existing interception facilities,installing flow restriction devices on the pumps,and constructing a 4 mm rainfall storage tank.After simulation,the stormwater interception rate increased from 58.9％to 85.3％,simplifying the calculation of retrofitting interception and storage,enhancing its applicability and further improving the linkage between interception and storage.This approach not only satisfied pollution control requirements but also more intuitively demonstrated the effectiveness of overflow pollution control,guiding a more rational and efficient implementation of combined sewer retrofitting in old city areas.
关键词
雨水截流率/水环境容量/当量降雨强度/MIKE/Urban/参数率定Key words
stormwater interception rate/water environment capacity/equivalent rainfall intensity/MIKE Urban/parameter determination引用本文复制引用
出版年
2024
NETL
NSTL
万方数据