城市雨水截留调控措施的截污减排效益评价

Efficiency assessment of sewage interception and discharge reduction with the urban rainwater intercepted and regulated

根据城区雨水系统特征,采用SWMM5.0平台建立某新城区雨水管网模型,利用LID控制模块对设置透水铺设、下凹式绿地、雨水花园和雨水桶等截留调控措施进行模拟,进而运用层次分析法对布设措施的截污减排效益进行评价,结果表明:各种措施均能对地表径流和排水水质起到削减作用,其中雨水花园的截污减排效益最高,下凹式绿地其次,雨水桶效益最小;面积相同时,雨水花园的截留调控效果优于下凹式绿地;在强降雨时雨水桶不能达到很好的截污减排效果.

On the building a storm water pipe network model of Qingdao new city region by SWMM5. 0,this paper,adopting LID control module, simulates laying permeable, sunken green,rainwater garden and rain barrels in four kinds of intercept control measures, and then using AHP, evaluates efficiency of sewage interception and discharge reduction. The result shows： the four kinds of measures above can reduce surface runoff and drainage water quality, and rainwater garden can achieve the highest efficiency of sewage interception and discharge reduction,sunken green next, rain barrels the last; the rainwater garden＇s inter-cept and regulation effect is better than the sunk green in the same area; in heavy rain events rain barrels cannot achieve perfect performance of sewage interception and discharge reduction.