DAI Li-feng,DU Sui,LIN Xue-jun,et al.Study on Overflow Frequency Control Rate of Overflow Pollution Control Standard in Urban Combined Sewer System[J].China Water & Wastewater,2020,36(12):56-59.
Study on Overflow Frequency Control Rate of Overflow Pollution Control Standard in Urban Combined Sewer System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
12
Page:
56-59
Column:
Date of publication:
2020-06-17
- Abstract:
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Under the premise that the sewage in the urban combined sewer system in dry weather is completely collected, the key to control the overflow pollution is to determine appropriate frequency of rainfall without overflow. For this purpose ， Wuhan Planning ＆ Design Institute listed the “Study on the Control Standards for Sewage Overflow Pollution in Urban Combined Sewer System Area” into the independent research project of the institute in 2018. Based on the analysis of Wuhan rainfall data, the relationship between daily rainfall, hourly rainfall intensity and the annual overflow frequency of the combined sewer system was obtained. Then, the concept of rainfall overflow frequency control rate was proposed. The quantitative relationship between the rainfall overflow frequency control rate and the hourly rainfall intensity was established as well. Based on the characteristics of local rainfall in Wuhan, a three-hour short-duration hyetograph corresponding to different rainfall overflow frequency control rates was put forward. By the calculation of the mathematical model of the drainage network with the rain-type data, the quantitative relationship between the different overflow control rates and the overflow pollutant reduction rates could be achieved.?
Last Update:
2020-06-17