摘要
生物滞留技术是目前应用较为广泛的雨洪控制利用措施,生物滞留技术在应用过程中也出现一些问题。针对传统生物滞留设施存在的水土流失、污染物表层累积、填料层更换困难等问题,提出了一种新型倒置生物滞留技术。通过实验室模拟试验,研究了不同重现期条件下,倒置生物滞留技术的水量、水质控制效果,并与传统生物滞留技术进行了比较。结果表明:倒置生物滞留技术在径流总量控制率、峰值削减率方面比传统生物滞留分别提高了9%~21%和1%~32%;在峰值延迟时间方面最大延长了8min;倒置生物滞留对TP、TN、COD、NH^+4-N等污染物的平均去除率比传统生物滞留分别提高了约6%、4%、3%、6%。研究成果可为倒置生物滞留技术在海绵城市建设中广泛应用提供技术支撑,为生物滞留技术的完善与发展提供借鉴和参考。
Bioretention technology is currently widely used in stormwater control and utilization,and bioretention technology also reveals some problems in the application process.Aiming at the problems of soil erosion,accumulation of pollutant on surface layer and difficulty in replacement of filler layer in traditional bioretention technology,a novel inverted bioretention technology was proposed.The artificially rainwater runoff was adopt in a series of laboratory experiments,to analyze the runoff volume and quality control effects of the novel bioretention technology under different return period,and compared with traditional bioretention technology.The results show that the novel bioretention technology improves the total runoff volume control rate and peak reduction rate by 9%~21%and 1%~32%,respectively,and the maximum delay of peak flow appear time is 8 min;the average removal rate of TP,TN,COD,NH+4-N by novel bioretention was increased about 6%,4%,3%,and 6%,respectively,compared with traditional bioretention.The research results can provide technical support for the extensive application of inverted bioretention technology in the construction of sponge city,and provide reference and reference for the improvement and development of bioretention technology.
作者
林宏军
王建龙
赵梦圆
孙博
谢剑飞
李俊奇
LIN Hongjun;WANG Jianlong;ZHAO Mengyuan;SUN Bo;XIE Jianfei;LI Junqi(Key Laboratory of Urban Stormwater System and Water Environment(Ministry of Education),Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《水利水电技术》
北大核心
2019年第6期11-17,共7页
Water Resources and Hydropower Engineering
基金
国家“十三五”水体污染控制与治理科技重大专项课题“北京市海绵城市建设关键技术与管理机制研究和示范”(2017ZX07103-002)
北京建筑大学研究生创新项目(PG2018045)
关键词
生物滞留
雨水径流
海绵城市
非点源污染控制
城市雨洪资源利用
bioretention
stormwater runoff
sponge city
non-point source pollution control
utilization of urban rainfall and flood resources
