一次典型降雨在内江城区形成地面径流重金属污染负荷研究  

Heavy Metal Pollution Load of Surface Runoff after a Typical Rainfall in Neijiang

作　　者：李瑞[1] 王恩熙[1] 周贵尧[1] 黄安[1] 张洲[1] 陈盼[1] 谢贤健[1] 

机构地区：[1]内江师范学院地理与资源科学学院,四川内江641100

出　　处：《内江师范学院学报》2012年第8期75-79,共5页Journal of Neijiang Normal University

基　　金：四川省教育厅青年基金(09ZB035);内江师范学院地理科学专业实践教学改革:实验教学示范中心项目(XSJ201103);内江师范学院大学生科研项目(11NSD-152)

摘　　要：利用SCS降雨模型,选取COD、氨氮两个常规评价指标以及铬、锰、铜、镍四个重金属指标,研究一次典型降雨在内江城区不同土地利用类型下产生的地面径流重金属污染负荷.结果表明:一次典型降雨在内江城区工矿、商业、交通、住宅和建筑五种土地利用方式下产生的COD、氨氮、锰、铬、铜、镍污染负荷浓度分别为37.20mg/L、0.67mg/L、0.12mg/L、0.01mg/L、0.03mg/L、0.03mg/L;产生的污染负荷总量分别是2361.08kg、35.20kg、7.41kg、1.47kg、1.28kg、7.44kg;商业用地产生的COD、氨氮污染负荷比例最大,负荷比例分别为66.56%、41.25%;交通用地产生的重金属污染负荷比例最大,锰、铬、铜、镍污染负荷比例分别为66.13%、7.75%、39.84%、45.30%;降雨径流将对研究区河道、湖泊以及河口产生短期或中长期污染.By use of the SCS rainfall model and the choice of COD, ammonia nitrogen as the conventional indices and Chromium, Manganese, Copper and Nickel as the heavy metal indices, an investigation is made of the heavy metal pollution load of the surface runoff in Neijiang after a typical rainfall under different types of land use. The results show： The concentration of Chemical Oxygen Demand（COD）, Ammonia Nitrogen, Manganese, Chromium, Copper and Nickel is tested to be 37.20rag/L, 0.67 mg/L, 0.12rag/L, 0. 0ling/L, 0.03mg/L, 0.03mg/L,and the pollution load total is 2361.08kg, 35.20kg, 7.41kg, 1.47kg, 1.28kg, 7.44kg respectively under the five types of land use： industrial mining, business, transportation, housing and architecture, the COD and Ammonia Nitrogen pollution load contained in commercial land were the biggest of the five types of land use, reaching up to 66.56 %, 41.25 % ; the ratio of the heavy metal pollution load caused by land of traffic use is the highest with the ratio of Manganese, Chromium, Copper and Nickel being 66.13%, 7.75%, 39.84% and 45.30% respectively, indicating that the rainfall runoff is to impose short or medium/long term pollution on rivers, lakes and estuaries.

关 键 词：内江城区 重金属污染 地面径流 典型降雨 

分 类 号：X522[环境科学与工程—环境工程]