摘要
为了定量研究海绵城市建设对降雨径流和污染控制的效果,引入SWMM模型,以深圳市光明区海绵城市示范点为研究对象,模拟分析了研究区基于平水年及不同重现期降雨条件下的降雨径流过程,结果表明:①海绵城市建设在削减地表径流量和径流污染方面效果显著,但缺乏后续管养维护会明显降低其控制效果;②海绵设施对重现期5年以内的小强度降雨控制效果较好,超过5年重现期,随着降雨强度增大,其径流控制率、峰值延后时间、峰值削减率和SS总量去除率均明显降低;③随着降雨强度增大,在海绵体和降雨径流双重作用下,SS最终稳定值越低。研究结果揭示了海绵城市退化对地表径流控制的抑制作用,对科学指导区域海绵城市建设及其运行维护具有一定的实际意义。
In order to quantitatively study the control effects of sponge city construction on runoff volume and runoff pollution,taking the sponge demonstration area in Guangming District,Shenzhen as the example,this paper simulates and analyzes the rainfall runoff process under the normal year and rainfall events of different return periods based on SWMM model.The conclusions are as follows:①Sponge city construction could significantly benefit the reduction of runoff volume and runoff pollution,but the effects would decrease if lacking the follow-up maintenance for sponge facilities.②Sponge facilities could evidently reduce the runoff volume and runoff pollution with rainfall return periods less than 5 years.Otherwise,the effects on runoff volume reduction,runoff peak delay,peak runoff volume reduction and suspended solid(SS)removal would weaken.③With the increase of the rainfall intensity,the final SS concentration would decrease under the dual action of sponge and rainfall runoff.The results show that degraded sponge facilities could restrain the control effects on rainfall runoff,which are of significance for sponge city construction and maintenance.
作者
卢巧慧
黄奕龙
彭知任
LU Qiaohui;HUANG Yilong;PENG Zhiren(Shenzhen Water Planning&Design Institute Co.,Ltd.,Shenzhen 518008,China;Huaihua Hydro Electric Design Institute,Huaihua 418000,China)
出处
《人民珠江》
2021年第8期17-25,共9页
Pearl River
基金
深圳市科技计划项目(JSGG20170824102728529)。
