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基于输出系数模型的红枫湖保护区非点源污染负荷研究
李政道1, 刘鸿雁1,2, 姜畅2, 顾小凤1, 涂宇1
1.贵州大学 农学院, 贵州 贵阳 550025;2.贵州大学 资源与环境工程学院, 贵州 贵阳 550025
摘要:
[目的] 探究红枫湖保护区非点源污染及其与水质的关系,了解红枫湖非点源污染负荷现状,为红枫湖保护区非点源污染的防控提供科学依据。[方法] 通过改进的输出系数模型(IECM)研究红枫湖总氮(TN)和总磷(TP)污染负荷。[结果] 2016年TN,TP的非点源污染排放量为863.78和77.14 t,用经验系数计算的非点源污染排放量TN为701.19 t,TP为232.99 t,改进的输出系数模型加入了地形影响因子,具有更高的准确性。2016年非点源排放的TN,TP占总污染负荷的73.54%和82.54%,相较于2008年非点源污染负荷TN,TP占比分别增加了27.03%和19.69%,但水质总体为Ⅱ类。[结论] 目前非点源污染是红枫湖的主要污染源,但对水质的影响较小。
关键词:  红枫湖保护区  总氮  总磷  污染负荷  输出系数模型
DOI:10.13961/j.cnki.stbctb.2020.02.028
分类号:X52;X503
基金项目:国家基金委-贵州省人民政府联合资助项目"喀斯特地区重金属污染过程与防控机制研究"(U1616442-2);贵州省土壤质量安全与水肥调控重点实验室(黔教合KY字[2016]001);贵州省生物学一流学科建设项目(GNYL[2017]009)
Non-point Source Pollution Load of Hongfeng Lake Reserve Based on Export Coefficient Model
Li Zhengdao1, Liu Hongyan1,2, Jiang Chang2, Gu Xiaofeng1, Tu Yu1
1.College of Agriculture, Guizhou University, Guiyang, Guizhou 550025, China;2.College of Resource and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China
Abstract:
[Objective] This paper aims to explore the non-point source pollution in Hongfeng Lake reserve and the relationship with it water quality, and understand the current status of non-point source pollution land, in order to provide the scientific evidence to prevent the non-point source pollution.[Methods] The total nitrogen (TN) and total phosphorus (TP) pollution load of Hongfeng Lake was studied by improved export coefficient model (IECM).[Results] The non-point source pollution emissions of TN and TP in 2016 were 863.78 t and 77.14 t respectively, and the non-point source pollution emissions of TN calculated by the empirical coefficient was 701.19 t, TP was 232.99 t, and the improved output coefficient model incorporated terrain factors increased accuracy greatly. In 2016, TN and TP of non-point source emissions accounted for 73.54% and 82.54% of the total pollution load. Compared with the non-point source pollution load in 2008, TN and TP accounted for 27.03% and 19.69%, respectively, but the water quality was generally Class Ⅱ.[Conclusion] At present, non-point source pollution is the main source of pollution of Hongfeng Lake, but it has little impact on water quality.
Key words:  Hongfeng Lake reserve  total nitrogen  total phosphorus  pollution load  improved export coefficient model