嘉陵江南充段水质评价及其污染源解析袁姁,鲁朝旭∗,吴雪梅,李红英,舒丽,雷熊,李晓曼,刘巧(四川省南充生态环境监测中心站,四川南充637000)摘要以2017—2019年南充市嘉陵江一级支流25个监测断面的年均值监测数据为研究对象,运用多种评价方法对水环境质量进行分析,并采用GIS和多元统计法分析水质变化特征及潜在污染物来源。结果表明,综合水质标识指数法最适合南充市嘉陵江一级支流河长考核制。嘉陵江南充段一级支流水质逐年改善,污染程度从高到低依次为蓬安县>高坪区>南充市>嘉陵区>阆中市>顺庆区>南部县>仪陇县;该地区主要污染物指标为化学需氧量(CODCr)、五日生化需氧量(BOD5)、总磷(TP)、氨氮(NH3-N)。主要受有机污染、富营养化污染和粪便污染的影响,工业废水、农业径流、生活污水以及畜牧污染物的排放是流域主要污染源。关键词水质评价;综合水质标识指数法;多元统计;GIS;污染源解析;嘉陵江中图分类号X824文献标识码A文章编号0517-6611(2023)11-0043-07doi:10.3969/j.issn.0517-6611.2023.11.011开放科学(资源服务)标识码(OSID):AnalysisofWaterQualityEvaluationandPollutionSourcesinNanchongSectionofJialingRiverYUANXu,LUZhao-xu,WUXue-meietal(NanchongEcologicalEnvironmentMonitoringCenterStationofSichuanProvince,Nanchong,Sichuan637000)AbstractBasedonthe2017-2019monitoringdataofNanchongJialingRiverfirstlevel25tributariesmonitoringsectionastheresearchob-ject,thewaterenvironmentqualitywasanalyzedbyvariousevaluationmethods,andthewaterqualitychangecharacteristicsandpotentialpollu-tantsourceswereanalyzedbyGISandmultivariatestatisticalmethods.TheresultsshowedthatcomprehensivewaterqualityidentificationindexmethodwasthemostsuitablefortheriverchiefexaminationsystemofthefirstgradetributaryofJialingRiverinNanchongCity.ThewaterqualityofthefirstleveltributariesinNanchongsectionofJialingRiverimprovedyearbyyear.ThepollutiondegreerankedasfollowsPeng’anCounty>GaopingDistrict>NanchongCity>JialingDistrict>LangzhongCity>ShunqingDistrict>NanbuCounty>YilongCounty.ThemainpollutantindexesinthisareawereCODCr,BOD5,TP,NH3-N.Itwasmainlyaffectedbyorganicpollution,eutrophicationpollutionandfecalpollution,andthefourmajorpollutionsourcesinthebasinwereindustrialwastewater,agric...
