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低影响开发雨水系统(LID)是建设海绵城市的主要途径之一,为研究LID建设规模对降雨径流产生的影响,以沈阳市满融经济开发区西部区域为例,运用SWMM模型计算了绿色屋顶、透水铺装、下沉式绿地三种措施对径流的削减效应。结果表明,三种措施均能有效削减区域径流量,且各单项措施所占总面积比例与径流系数之间存在良好的负相关线性关系;雨强的增大削弱了绿色屋顶、下沉式绿地对径流的削减效果,而透水铺装受降雨条件的影响不明显;三种措施的削减效果由大到小依次为透水铺装、绿色屋顶、下沉式绿地;组合措施相较于单项措施具有更好的径流削减效益。研究结果为海绵城市的规划建设提供了理论依据。
Low impact on the development of rainwater system (LID) is one of the main ways to build a sponge city. To study the impact of LID construction scale on rainfall runoff, taking the western region of Man-Rong Economic Development Zone in Shenyang as an example, the green roof , Water-permeable pavement, submerged green space three kinds of measures to reduce the effect of runoff. The results show that all the three measures can effectively reduce the regional runoff, and there is a good negative correlation between the proportion of the total area and the runoff coefficient; the increase of rainfall intensity weakens the green roof, sunken green space The effect of reducing runoff was not obvious, but the effect of rainfall-permeable pavement was not obvious. The reduction effect of three measures was permeable pavement, green roof and sunken green space in descending order. Compared with the single measures, the combination measures Better runoff reduction benefits. The results provide a theoretical basis for the planning and construction of sponge city.