摘要
近年来,随着我国高速公路的快速发展,公路对周边环境的影响问题大量涌现,其中降雨径流的非点源污染日趋严重。采用现场连续取样和国家标准水质分析方法,选取重庆渝武高速公路,对路面径流中污染物的浓度值进行监测,分析其出流规律,计算次降雨径流平均浓度,并且探讨各污染因子之间的相关性以及径流的可生化性。结果表明:对于初期降雨量大的降雨事件,初期效应显著;从各污染物的次降雨径流平均浓度可得各污染物浓度大部分超过Ⅴ类地表水标准和二级排放标准,悬浮物(SS)、化学需氧量(COD)、总氮(TN)、总磷(TP)浓度较高,污染贡献率大,为主要污染物;COD、BOD5、Pb、Zn、Cu与SS之间存在着良好的线性关系,其回归效果较好;径流的可生化性较差,不适合用传统的生物处理法加以处理。本研究为今后进一步研究重庆市径流污染提供资料,为环保部门实现径流污染的控制管理提供科学依据和方法。
In recent years,as the rapid extension and development of expressway in China,numerous environmental issues sprout up,among which non-point source pollution of runoff appears seriously.With the methods of on-site continuous sampling and the national standard water quality analysis,monitoring of the surface runoff has been carried out in Chongqing Yuwu Expressway.The research analysed the flow trend of the surface runoff,calculated the Event Mean Concentration(EMC)and explored the correlation between the pollution factors and biodegradability.The results showed that the initial effect was significant among rainfall events with large rainfall at the initial stage.The EMC demonstrated that the great majority of pollutant concentrations exceeded V type of Surface Water Standards and II Emission Standards.High concentrations of SS,COD,TN,TP,being the main pollutants,contributed to the pollution to a larger extent.It existed fine linear correlation among the water quality parameters:SS,COD,BOD5,TP,Cu,Zn,and Pb.The poor biodegradability proved that the traditional biological treatment method was not a suitable processing approach of this kind of runoff.This study could provide a reference for further research on the pollution of Chongqing's runoff,and scientific basis for the control and management of the Environmental Protection Department.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2010年第S1期148-152,共5页
Resources and Environment in the Yangtze Basin
基金
西部交通建设项目(200731822108)
