成都市主城区道路冲洗径流污染研究  

Study on pollution load of road flushing runoff in central city of Chengdu

作　　者：杨之倩 寻亚非 蒋宇 康愉晨 蒲梦晗 陈文清[1] YANG Zhiqian;XUN Yafei;JIANG Yu;KANG Yuchen;PU Menghan;CHEN Wenqing(College of Architecture and Environment,Sichuan University,Chengdu 610065,China;Chengdu Institute of Urban Management Science,Chengdu 610000,China)

机构地区：[1]四川大学建筑与环境学院,成都610065 [2]成都市城市管理科学研究院,成都610000

出　　处：《中国科技论文》2024年第1期77-84,130,共9页China Sciencepaper

摘　　要：为评估城市道路冲洗径流污染程度,于2022年3—8月在成都市主城区内选取交通性路段、商业性路段、生活性路段和餐饮性路段进行冲洗水径流采样,通过对采样结果进行差异显著性分析,探究道路类型、降雨冲刷和较高气温(>30℃)对冲洗径流污染负荷的影响,综合考虑这3个因素推导道路冲洗径流年污染排放量估算公式。结果表明:不同类型道路冲洗径流污染程度存在差异,其中,餐饮性路段严重,生活性路段和商业性路段次之,交通性路段最轻;通过相关性分析推测,路两侧餐饮经营活动的污染排放是导致不同类型道路冲洗径流污染负荷值存在差异的主要原因;此外,较高气温(>30℃)会导致道路冲洗经流污染负荷升高,而降雨则反之;以成都市为例进行估算,2022年主城区道路冲洗径流中化学需氧量(chemical oxygen demand,COD)、总氮(total nitrogen,TN)、总磷(total phosphorus,TP)、悬浮物(suspended solids,SS)和氨氮(ammonia nitrogen,NH3-N)的排放量分别为3 506、167.56、30.32、1 441、55.687 kg。To assess the pollution level of urban road flushing runoff,a sampling was conducted between March and August 2022 in the main urban area of Chengdu city,including traffic,commercial,residential,and catering roads.The effects of road type,rainfall erosion,and high temperature(>30℃)on the pollution load of road flushing runoff were explored by difference significance analy-sis,and formulas for estimating the annual pollution discharge of road flushing runoff was derived by comprehensively considering these three factors.The results reveal the existence of differences in the pollution level of road flushing runoff among different types of roads,with the catering roads being the most severe one,followed by the residential and commercial roads,and the traffic roads being the lightest.Through correlation analysis,it is inferred that the pollution emissions from catering business activities on both sides of the road are the main reasons for the difference in the pollution load values of differene types of road flushing runoff.Addi-tionally,high temperatures(>30℃)will lead to an increase in the pollution load of road flushing runoff,while rainfall exhibits an opposite effect.Based on Chengdu city,the estimated annual pollutant emissions of chemical oxygen demand(COD),total nitrogen(TN),total phosphorus(TP),suspended solids(SS),and ammonia nitrogen(NH3-N)in road flushing runoff in the main urban area in 2022 were 3506,167.56,30.32,1441,and 55.687 kg,respectively.

关 键 词：城市道路冲洗径流 年污染排放量 污染负荷 影响因素 

分 类 号：X522[环境科学与工程—环境工程]