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中文摘要：
雨水花园是结合城市景观,以滞留和净化雨水径流为主要功能的生物滞留处理系统,能够在一定程度上减轻城市化进程对城市水文和水质的负面影响。根据在西安市雨水花园蓄渗屋面雨水径流的现场试验,确定在各种暴雨条件下,花园设计及土壤入渗能力不同时,雨水花园拦蓄雨水径流的能力以及花园溢流的时间和溢流量。结果显示,黄土具有良好的入渗能力,达到2.346m/d;在较为湿润的2011年基本没有发生溢流,汇集的雨水径流全部入渗补给了地下水。对于某一重现期的暴雨,雨水花园溢流总量受到降雨强度和历时二者叠加效果的影响。
英文摘要：
Rain gardens are bioretention systems that are designed with urban landscaping and used for retaining and purifying urban stormwater runoff.Rain gardens can mitigate the adverse impact of urbanization on hydrology and water quality.This paper presented an experimental study on the infiltration capability of a rain garden constructed in Xi＇an,China.Time and volume for overflow in the rain garden under storms of variable duration and recurrence interval were calculated.The results showed that the loess soil in Xi＇an area had a good infiltration capacity,the average value of the measured infiltration rates was 2.346 m/d in the rain garden,nearly all stormwater runoff collected in the relatively wet year of 2011 infiltrated and recharged to the groundwater.For storms of a specified recurrence interval,rainfall intensity and the duration were two controlling factors that caused overflow in the rain garden.
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