【摘要】 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。更多还原

【Abstract】 Low impact development(LID)is one of the approaches to construction of sponge city.In order to study the impact of LID on rainfall-runoff,the western region of Manrong Economic Development Zone in Shenyang City was taken for an example,and the SWMM model was used to calculate the reduction of runoff by three measures:green roof,permeable pavement and low elevation greenbelt.The results show that the three measures can reduce the regional runoff effectively.There is negative correlation between the area ratio of each individual measure and runoff coefficient.With the increase of rainfall intensity,the reduction effects of green roof and low elevation greenbelt on runoff are gradually weakened.However,the effect of permeable pavement on runoff is not affected by rainfall.According to the reduction effect from large to small order is permeable pavement,green roof,low elevation greenbelt.Combined measures have better runoff reduction benefits than the single measure.The results provide a theoretical basis for the planning of sponge city.更多还原