绿化屋顶基质材料及厚度对屋面径流雨水水质的影响  

Influence of Substrate Material and Thickness of Green Roof on Runoff Quality

作　　者：王晓晨[1] 张新波[2] 赵新华[1,3] 王江海[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津城建大学环境与市政工程学院,天津300384 [3]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《中国给水排水》2015年第1期95-99,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(2014ZX07203-009);国家自然科学基金资助项目(51308385)

摘　　要：根据我国华北地区降雨及其水质特点,建立了5套双基质层绿化屋顶小试装置,着重考察了绿化屋顶结构中基质材料及厚度对屋面径流出水水质的影响。结果表明,营养基质材料对绿化屋顶径流水质有关键性的影响,特别是对NO-3、PO3-4和有机物这类易因淋洗而释放的污染物,选取肥力适中、营养物质释放缓慢的无机营养填料可大幅提高绿化屋顶的径流水质;吸附基质层厚度的增加可以在一定程度上提高径流出水水质;通过选用合适的基质材料和适当的基质体积比,可以削减城市屋面雨水径流中污染物含量。According to the characteristics of storm in North China, five green roof assembles were constructed to evaluate the influence of substrate material and thickness on runoff quality. The results showed that nutrient substrate material had a decisive influence on runoff quality, specially on the pollu- tants such as NO3^- , PO4^3- and organic matter which were easy to be released by leaching. Selecting the inorganic nutrients with moderate fertility and slow nutrient release could dramatically improve the green roof runoff quality. Increasing substrate thickness could improve the runoff quality to a certain extent. Proper substrate material and volume ratio could help remove the pollutants in urban roof runoff.

关 键 词：绿化屋顶 径流水质 营养基质材料 基质层厚度 污染物削减 

分 类 号：X52[环境科学与工程—环境工程]