Coutermeasures of Overflow Pollution Control for Typical Combined Drainage System in Shanghai
At present,the combined drainage system widely exists in various large and medium-sized cities in China.The overflow pollution of the combined drainage system is the main cause of urban water environment pollution.Taking the typical combined drainage system in Shanghai as the research object,combined with the data investigation and relevant operation data,the main influencing factors of combined overflow pollution were analyzed,and the model of typical combined drainage system was constructed to analyze that the addition of initial rain storage tank can effectively reduce the combined overflow pollution.Based on the drainage system model,the indices such as initial rain regulation and storage standard,rainwater runoff control rate and the overflow pollution times were analyzed.When the closure standard was 11 mm,the volume of the regulation and storage tank was 37 950 m3,the annual rainwater runoff control rate was 70.84%,and the discharge frequency of the pump station was reduced from 27 to 19.For the urban combined drainage system,the local rainfall conditions and the environmental capacity of the receiving water body should be combined with the analysis of the drainage system model,and the initial rainfall interception standard and the minimum overflow rainfall shall be taken as the control parameters for the reconstruction of the intercepted combined drainage system.
万方数据
维普
