合肥地区生物滞留设施的合理构型和设计参数  

Reasonable Configuration and Design Parameters of Bioretention Facilities in Hefei

作　　者：朋四海[1] 李田[1] 黄俊杰[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国给水排水》2014年第17期145-149,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07303-001)

摘　　要：在土壤渗透速率低、地下水位高的合肥市建造了3个构型和设计参数各异的生物滞留设施开展现场中试，考察设施的水文效应以及对径流的净化效果。借助经现场试验数据验证率定的RECARGA模型，结合当地的降雨特性选择适用于合肥地区的生物滞留设施构型和设计参数。研究表明，建有下排水系统的生物滞留设施的服务面积比宜取5％～7％，填料渗透速率宜取3—5cm／h，设施的表面储水区深度宜取15～20cm，内部储水区的设置可以大幅削减排水管出流量。当地过低的原土渗透速率使得渗透型生物滞留设施的应用受到很大的限制。Three sets of pilot-scale bioretention facilities with different configuration and design pa rameters were built in Hefei City, where the soil infiltration rate was low and the underground water table was high. The hydrologic and pollutant removal effects of the bioretention facilities were investigated. RECARGA model was verified and calibrated based on the field test data, and the configuration and de- sign parameters of bioretention facilities suitable for Hefei area conditions were selected based on the local rainfall characteristics. Studies showed that when bioretention facilities with underdrain were used, the service area ratio should be 5 % to 7 %, the infiltration rate of fillers should be 3 to 5 cm/h, and the bowl depth should be 15 to 20 era. By means of internal water storage, effluent through underdrain could be substantially reduced. The infiltration rate of situ soil was too low to support the use of infiltration bioretention facilities.

关 键 词：生物滞留设施 构型 设计参数 模型模拟 

分 类 号：TU992[建筑科学—市政工程]