雨水花园设计要点剖析与应用实例

摘要

雨水花园是一种有效的雨水最佳管理实践措施,也是我国海绵城市建设优先推荐选用的技术措施,可有效净化雨水中的污染物,并实现水文削峰与调控功能,具有良好的景观效应和生态功能.首先根据不同区域与规模介绍了雨水花园的布局形式,然后结合不同应用条件,详细剖析了雨水花园蓄水层、过滤介质层、植物、进水与溢流系统等主要构造,并对比分析了雨水花园面积常用的确定方法;最后解析了墨尔本中心街道雨水花园设计实例,以期为国内雨水花园的设计提供参考.%Rain gardens,as the best management practice in stormwater management and one of the preferential technical measures in the construction of sponge cities,can effectively control runoff pollution,substantially reduce runoff volumes and peak flows.And it also has good landscape effect and ecological function.According to the different regional scale,the layout form of rain garden was introduced,and then the important parameters in the design of facilities structure and composition on some aspects combined with different application conditions,such as aquifers layer,plants,filtering medium layer,and inlet and overflow system,were analyzed.Meanwhile,different popular design methods of facilities area were compared and analyzed.Finally,the design example of rain garden in Melbourne Central was studied,which would provide a fundamental idea for the design of domestic rain gardens.