[1]姜文超,杨希,董晓霞,等.重庆市某城区市政污水管道水力参数监测与分析[J].中国给水排水,2022,38(15):78-83.
　JIANGWen-chao,YANGXi,DONGXiao-xia,et al.Monitoring and Analysis of Hydraulic Parameters of Municipal Sewer in an Urban Area of Chongqing City[J].China Water & Wastewater,2022,38(15):78-83.
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重庆市某城区市政污水管道水力参数监测与分析

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第15期 页码: 78-83 栏目: 出版日期: 2022-08-01
Title:
Monitoring and Analysis of Hydraulic Parameters of Municipal Sewer in an Urban Area of Chongqing City
作者:
姜文超1,2， 杨希1,2， 董晓霞3， 许雨桐1,2， 林于廉4
（1.重庆大学 环境与生态学院，重庆 400045；2.三峡库区生态环境教育部重点实验室，重庆 400045；3.重庆市九龙坡区住房和城乡建设委员会，重庆 400050；4.重庆水利电力职业技术学院 市政工程学院，重庆 402160）
Author(s):
JIANG　Wen-chao1，2， YANG　Xi1，2， DONG　Xiao-xia3， XU　Yu-tong1，2， LIN　Yu-lian4
（1. College of Environment and Ecology， Chongqing University， Chongqing 400045， China； 2. Key Laboratory of the Three Gorges Reservoir Region’s Eco?Environment ， Chongqing 400045， China； 3. Housing and Urban Rural Development Commission of Jiulongpo District in Chongqing， Chongqing 400050， China； 4. School of Municipal Engineering， Chongqing Water Resources and Electric Engineering College， Chongqing 402160， China）
关键词:
污水管道;  水力参数;  水力停留时间
Keywords:
municipal sewer;  hydraulic parameter;  hydraulic retention time
摘要:
了解污水管道的实际水力状况对完善规划设计和维护管理具有重要意义。为此，对重庆市某城区市政污水管道（DN400）的水力参数进行了监测。结果表明，W1~W4监测点的平均流速分别为0.16、0.25、0.52、0.29 m/s，均未达到不淤流速0.60 m/s；最大流速分别为0.40、0.51、1.10、0.55 m/s，均低于设计流速；95%累积频率流速分别为0.29、0.39、0.92、0.46 m/s，大部分都低于不淤流速。相应的充满度和流量监测数据也都低于设计值。各监测点的实际水力状况远未达到设计工况，水力效率偏低，其原因可能与规定的市政污水管道最小管径及用水定额取值偏大有关。以各监测点平均流速计算，1 km监测管道中污水的总停留时间接近1 h。管径偏大可能会造成水力效率低、投资浪费、淤积增加，甚至会造成污水停留时间及有机物降解率增加，值得关注。
Abstract:
It is of great significance to understand the actual hydraulic condition of the municipal sewer system to improve its planning, design, maintenance and management. Therefore, the hydraulic parameters of the municipal sewers (DN400) in an urban area of Chongqing were monitored. The average flow velocities of W1-W4 monitoring sites were 0.16 m/s, 0.25 m/s, 0.52 m/s and 0.29 m/s, respectively, which did not reach the non?silting flow velocity of 0.60 m/s. The maximum flow velocities were 0.40 m/s, 0.51 m/s, 1.10 m/s and 0.55 m/s, respectively, which were all lower than the design flow velocity. The flow velocities with cumulative frequency of 95% were 0.29 m/s, 0.39 m/s, 0.92 m/s and 0.46 m/s, respectively, most of which were lower than the non-silting flow velocity. The corresponding fullness and flow rate monitoring data were also lower than the design value. The actual hydraulic condition of each monitoring site was far from the design condition, and the hydraulic efficiency was low, which might be related to the relatively too large values of municipal sewer minimum diameter and per capita water consumption standard. According to the average flow velocity of each monitoring site, the total retention time of sewage in a monitoring sewer with distance of 1 km was close to 1 h. Relatively too large pipe diameter may result in low hydraulic efficiency, waste of investment, increase of siltation, and even increase of sewage retention time and degradation rate of organic matter, which is worthy of attention.

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更新日期/Last Update: 2022-08-01