2023年4月收稿日期:2022—06—22作者简介:侯钰阔(1988—),男,工程师,主要从事水环境监测与评价工作。摘要:采用单因子评价法和水污染指数法对2021年海河干流上7个点位进行取样分析,监测项目为《地表水环境质量标准》(GB3838-2002)表1中的24项评价指标。对海河干流各断面的年均值进行评价,并进行枯水期和丰水期对比。结果表明,海河干流水质2021年比2016年得到了显著改善,2021年海河干流上游水质平均值符合地表水Ⅲ类标准,完成水功能区水质达标要求;下游全年水质劣于Ⅴ类标准。丰水期受雨后排污影响,上游水质劣于枯水期,下游水质优于枯水期。海河干流的主要污染物为化学需氧量。关键词:海河干流;单因子评价法;水污染指数法;化学需氧量中图分类号:X824文献标识码:A文章编号:1004-7328(2023)04-0020-04DOI:10.3969/j.issn.1004-7328.2023.04.005海河干流水质现状评价侯钰阔,赵一莎(天津市水文水资源管理中心,天津300061)CurrentWaterQualityEvaluationofHaiheRiverMainStreamHOUYu-kuo,ZHAOYi-sha(HydrologyandWaterResourcesManagementCenterofTianJin,Tianjin300061,China)Abstract:Thesinglefactorevaluationmethodandwaterpollutionindexmethodwereusedtosampleandanalyze7pointsonHaiheRivermainstreamin2021.Themonitoringitemswere24evaluationindexeslistedinTable1of”SurfaceWaterEnvironmentalQualityStandard”(GB3838-2002).TheannualmeanvalueofeachsectionofHaiheRivermainstreamwasevaluatedandcomparedbetweendryseasonandwetseason.TheresultsshowedthatthewaterqualityofHaiheRivermainstreamin2021wassignificantlyimprovedcomparedwiththatin2016.TheaveragewaterqualityofTheupperreachesofHaiheRivermainstreamin2021metClassⅢwaterqualitystandardofsurfacewater,fulfillingthewaterqualitystandardofthewaterfunctionalarea.ThedownstreamwaterqualitywasworsethantheClassⅤwaterqualitystandard.Inthewetseason,affectedbypollutiondischargeafterrain,theupstreamwaterqualitywasworsethanthatofdryseasonandthedownstreamwaterqualitywasbetterthanthatofdryseason.ThemainpollutantinHaiheRivermainstreamischemicaloxygendemand.Keywords:HaiheRivermainstream;singlefactormethod;waterpollutionindexmethod;chemicaloxygendemand1引言海河干流起自子北汇流口(子牙河...