Page 58 - 《水资源与水工程学报》2025年第1期
P. 58

!36 "!1 #                         & ' ( ) & * + , -                               Vol.36No.1
               2025 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2025

            DOI:10.11705/j.issn.1672-643X.2025.01.07


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                 BC<DE:X522;S959   FGHIJ:A    FKLE:1672643X(2025)01005409

                         Attributionanalysisofdissolvedoxygenanomaliesbasedon
                                   MIKE11-Ecolabrivernetworkmodeling

                                                                                         1,2
                                           1,2
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                              WANGZhihao ,PANGYong ,ZHANGLiting ,LIUJiabei
                    (1.KeyLaboratoryofIntegratedRegulationandResourceDevelopmentonShallowLakes,MinistryofEducation,
                   HohaiUniversity,Nanjing210098,China;2.CollegeofEnvironment,HohaiUniversity,Nanjing210098,China)
                 Abstract:Statisticalmethodswerecombinedwithmathematicalmodellingtoanalyzethecausesoftheab
                 normalchangesindissolvedoxygenconcentration ,andtheeffectsofrestorationmeasuresondissolvedox
                 ygenanomaliesinwaterenvironment.TakingtheYanheRiverinJiangsuProvinceasthecasestudy,we
                 analyzeddissolvedoxygenconcentration ,relatedwaterqualityfactors,andrainfalldatausingPearson
                 correlationanalysis ,soastoidentifythemaininfluencingfactors.Then,thecorrespondingMIKE11-
                 Ecolabcoupledmodelwasestablishedtocomparetheeffectsofdifferentrestorationmeasuresonthedis
                 solvedoxygenconcentrationoftherivernetwork.Theresultsshowedthatdissolvedoxygenconcentration
                 wassignificantlyandnegativelycorrelatedwithwatertemperature ,rainfall,permanganateindex,andbi
                 ochemicaloxygendemand.Watertemperature ,stormwaterrunoffpollution,andphotosyntheticefficiency
                 hadthegreatestimpactondissolvedoxygen.Withanincreaseof20% inwatertemperature,dissolved
                 oxygenconcentrationdecreasedby53.68%;areductionof50% instormwaterrunoffpollutionledtoan
                 improvementof26.48% indissolvedoxygenconcentration ;anincreaseof50% inphotosyntheticeffi
                 ciencyimprovedthedissolvedoxygenconcentrationby16.43%.Thisstudycanprovideareferenceand
                 theoreticalbasisforwaterecologicalrestorationinrivernetworkareas.
                 Keywords:waterquality;dissolvedoxygenconcentration;dissolvedoxygenanomalyrestoration;
                 MIKE11-Ecolabcoupledmodel;theYanheRiver;JiangsuProvince






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