白洋淀周边重点区域入淀河流水质时空差异性特征分析

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中图分类号：X522 文献标识码：A DOI： 10.7535/hbgykj.2026yx01006

Abstract：To furtherimprove the waterqualityof the Xiaoyi River，anupstream tributary flowing into the Baiyangdian Lake， basedon four monthly waterquality monitoring dataand monthly precipitationdata collcted from six crossections in the XiaoyiRiverbasinfrom 2O2O to2024，as wellastheinflowof its tributariesandthespatiallocationsofdischargeoutletsinto the river，this studyemployedthecompositewater qualityidentification index method，clusteranalysis，and principal component analysis tocomprehensively evaluate the water qualitychanges inthebasin，asessthe spatiotemporal distribution patterns，and investigate the influencing factors.Theresults indicatethattheoverallwaterqualityduring thefloodseason is slightly worse compared to the non-flood season. At some monitoring sections，water quality reaches Class I during the nonflood season，while the water quality during the flood season ranges from Class I to Class IV . The composite water quality identificationindexateach section showes asignificant positivelinear corelation with the numberof upstream discharge outlets，indicating that dischargeof domesticand industrial waste（sewage）water significantlyimpact river water quality. Spatially，upstream waterqualitywas superiortothatofthemiddle and downstream sections.Excesivetotalnitrogen concentrationis the primarycauseof waterqualitydeterioration.Theresearch findings provide theoretical basisanddata support for water pollution prevention and control in the Baiyangdian basin.

Keywords：water polutionpreventionandcontrol enginering；XiaoyiRiver；principalcomponentanalysis；clusteranalysis; composite water quality identification index

白洋淀是华北平原最大的淡水湖泊，位于雄安新区的核心位置，对华北地区的气候调节和区域生态涵养都具有不可替代的作用[1-2]。（剩余13362字）