雨水花园对屋面雨水的滞蓄与净化效果  

Retention and Purification Effect of Roof Rainwater by Rain Garden

作　　者：张彬鸿 邓朝显 马越 李家科[1] 蒋春博 马萌华 ZHANG Bin-hong;DENG Zhao-xian;MA Yue;LI Jia-ke;JIANG Chun-bo;MA Meng-hua(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi'an University of Technology,Xi'an 710048,China;Technology Research Center for Sponge City,Fengxi New City Development and Construction Group Company,Xi'an 712000,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]陕西省西咸新区沣西新城开发建设〈集团>有限公司海绵城市技术中心,陕西西安712000

出　　处：《中国给水排水》2019年第21期132-138,共7页China Water & Wastewater

基　　金：西咸新区沣西新城海绵城市应用基础研究与技术开发计划项目(2017610002000089);陕西省重点研发计划项目(2017ZDXM-SF-073)

摘　　要：2017年对西咸新区某小区内设置有淹没区并添加给水厂污泥(WTR)的新建雨水花园进行连续监测,结果显示,雨水花园有很好的径流量滞留能力,对中小雨(日降雨量<25 mm)的径流量削减率基本可达到60%以上;填料淋洗对径流污染物去除效果有不同程度的影响,其中总氮和硝态氮去除率所受影响最大。8月20日以后雨水花园运行基本趋于稳定,径流污染物去除率均有一定上升,SS、COD、总氮、氨氮、硝态氮和总磷的去除率分别为23%~40%、14.69%~80%、20%~45%、15%~55%、-10%~45%、20%~55%。从径流污染物负荷削减率来看,雨水花园对COD、氨氮、SS和总磷负荷均有良好的削减效果,基本可达到68%以上,受填料淋洗影响,雨水花园对总氮和硝态氮负荷的削减率为负值。In 2017,continuous monitoring was carried out in a newly-built rain garden with flood zone and addition of water treatment plant sludge in a community in Xixian New Area.The rain garden had a good runoff retention capacity,and the runoff reduction rate of small and medium rainfall(<25 mm)basically reached more than 60%.Leaching of filler had different effects on the removal of runoff pollutants,among which the removal rates of total nitrogen and nitrate nitrogen were the most affected.The operation of the rain garden basically stabilized after August 20 th,and removal rates of runoff pollutants all increased to a certain extent.The removal rates of SS,COD,total nitrogen,ammonia nitrogen,nitrate nitrogen and total phosphorus were 23%-40%,14.69%-80%,20%-45%,15%-55%,-10%-45%and 20%-55%,respectively.In terms of reduction rate of pollutants load,rain garden had a good reduction effect on COD,ammonia nitrogen,SS and total phosphorus loads,and the reduction rates basically reached more than 68%.Affected by the leaching of the filler,the reduction rates of total nitrogen and nitrate nitrogen loads in rain garden were negative.

关 键 词：海绵城市 雨水花园 径流量削减 污染负荷削减 填料淋洗 

分 类 号：TU992[建筑科学—市政工程]