The Research Of Sewage Interception Ratio In Shenzhen Area

The sewage interception is one of the important water-controlling measures on city water environment, and the interception ratio selection has critical influence on the project benefit and investment. With the operation examination on typical land pollution in main rivers (bays) in Shenzhen and utilizing SWMM water conservation software, this research has established the producing and evolution model of main non-point source pollutant in Shenzhen, as well as washout rule utilized on land with different amount of non-point source pollutant. Also, on the base of the water quality in different rivers/bays, the research analyzed the influence of waste pit on water quality or emissions appraisal under the circumstance that the waste pit has different interception ratio when calculating sewage interception project. Such that, recommend the best interception ratio distribution in each waste pit, and set up interception model. Moreover, from the aspect of project construction and operation cost, the article also makes a comparison on economics selecting different interception ratio, and draw a conclusion which is tallied with technical comparison.After the research, we suggest to use the interception ratio of 0-2 in Shenzhen rivers/bays with the precondition of controlling non-point source pollutant field and improving the separate system proportion.