北京常用草坪式屋顶绿化轻型基质对屋面雨水径流控制影响研究  

Study on Influence of Different Growing Mediums of Lawn Green Roofs for Roof Runoff Control in Beijing

作　　者：单进 戴子云 SHAN Jin;DAI Ziyun(Beijing Key Laboratory of Ecological Function Assessment and Regulation Technology of Green Space,Beijing Institute of Landscape Architecture,Beijing 100102)

机构地区：[1]北京市园林科学研究院园林绿地生态功能评价与调控技术北京市重点实验室

出　　处：《北方园艺》2019年第20期86-91,共6页Northern Horticulture

基　　金：北京市自然科学基金资助项目(6174042);国家自然科学基金资助项目(31700630)

摘　　要：屋顶绿化是海绵城市低影响开发雨水径流源头控制的重要组成部分,同时也是降低城市屋顶产污负荷的有效手段。根据北京地区的降雨特点,建立了1套屋顶绿化基质模拟降雨测试装置,研究了北京常用草坪式屋顶绿化基质材料对屋面径流出水水量和水质的影响。结果表明:与园林土作为主要成分的基质相比,以多孔性无机矿石粉碎物为主要成分的"宝绿素"在雨水径流削减、产流延缓、峰值流量削减和延后等方面的效果更好;使用"宝绿素"作为草坪式屋顶绿化基质材料能够提高降雨初期对污染物的控制效果。需要综合考虑建造成本和植物景观效果,在此基础上通过选用合适的基质材料达到控制城市屋面雨水径流水量和水质的目的。Roof greening is an important technology of the low-impact development of stormwater runoff control in Sponge City,and it is also an effective means to reduce the pollution load on urban roofs.According to the characteristics of rainfall in Beijing,a set of rainfall simulation testing device was established to study the influence of lawn-style green roof substrate commonly used in Beijing on roof water flow and water quality.The results showed that compared with the substrate with garden soil as the main component,‘Baolyusu’ with perlite as the main component had better effects on reducing stormwater runoff and peak flow,and delaying runoff time.In addition,it can improve the control effect of pollutants at the early stage of rainfall.It is necessary to comprehensively consider the construction cost and the plants landscape,and on this basis,the purpose of controlling the amount of runoff water and water quality of the urban roof can be achieved by selecting suitable substrates.

关 键 词：草坪式绿色屋顶 轻型基质 雨水滞蓄 污染物净化 

分 类 号：TU985.12[建筑科学—城市规划与设计] S731.5[农业科学—林学]