Page 81 - 《水资源与水工程学报》2022年第6期
P. 81

! 33 " ! 6 #                      & ' ( ) & * + , -                               Vol.33No.6
               2022 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2022

            DOI:10.11705/j.issn.1672-643X.2022.06.10


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               KLDMN:X524   OPQRS:A    OTUN:1672643X(2022)06007707

            Influenceofsedimentationonthespatialdistributionofphosphorusinreservoirs
                                          1
                                                                                          2
                                                                               1
                                                                   2
                                                       1
                               YANGTong,SUNZhilin,SUNLixia,LIZongyu,ZHULili
                       (1.OceanCollege,ZhejiangUniversity,Zhoushan316021,China;2.CollegeofCivilEngineeringand
                                      Architecture ,ZhejiangUniversity,Hangzhou310058,China)
               Abstract:Phosphorusisthemainindicatingfactorofreservoireutrophicationandhasstrongaffinitytosedi
               ment.Inordertoexplorethespatialdistributionlawofphosphorusinreservoirs ,asimulationtestonthe
               effectofsedimentationonphosphorusadsorptionwascarriedoutunderthecouplingactionofdifferentenvi
               ronmentalfactors.Besides ,theformulaforcalculatingverticaldistributionofphosphorusconcentrationin
               liquidphasewasestablishedbasedondimensionalanalysisandmultipleregressionmethod.Theresults
               showthattheverticaldistributionofliquidphasephosphorustendstobethickeratthetopandthinneratthe
               bottomofthereservoirduetophosphorusadsorptionduringsedimentation.Thesmallertheparticlesize ,the
               highertheconcentrationofsedimentandthedeeperthewaterdepth,thegreatertheconcentrationgradient
               andthemoreinhomogeneoustheverticaldistributionofphosphorusinliquidphase.Theverticaldistribution
               formulaofliquidphasephosphorusshowsthatthegradientofliquidphasephosphorusconcentrationispro
               portionalto1/4powerofsedimentconcentration ,-2/3powerofsedimentparticlesizeand1/3powerof
               waterdepth ,andtheminimum valueofliquidphasephosphorusconcentrationisproportionalto-1/20
               powerofsedimentconcentration ,1/10powerofsedimentparticlesizeand -1/10powerofwaterdepth.
               Thecalculatedresultsareingoodagreementwiththoseofthesimulationtest,indicatingthatthederived
               formulaisapplicabletothestudyofphosphorusdistributioninreservoirs.
               Keywords:reservoir;sedimentation;sedimentparticlesize;liquidphasephosphorus;verticaldistribution
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