32720117ENVIRONMENTALSCIENCEVol.32No.7Jul.2011121*31411./1000122.0751313.6710004.671000、、、、.1992~20096.61~7.42mg·L-196.42mg·L-1.5.15mg·L-1.、.、、...X52A0250-3301201107-1952-082010-08-012010-12-162008ZX07105-00540703017408730791974~E-mailhaichaozhao19@163.com*E-mailwangsr@craes.org.cnRelationshipBetweentheDOandtheEnvironmentalFactorsoftheWaterBodyinLakeErhaiZHAOHai-chao12WANGSheng-rui1ZHAOMing3JIAOLi-xin1LIUBin4JINXiang-can11.StateEnvironmentalProtectionKeyLaboratoryforLakePollutionControlResearchCenterofLakeEco-EnvironmentChineseResearchAcademyofEnvironmentalSciencesBeijing100012China2.CollegeofAgriculturalScienceHebeiNorthUniversityZhangjiakou075131China3.DaliEnvironmentalMonitoringCenterDali671000China4.EnvironmentalProtectionBureauofDaliPrefectureofYunnanProvinceDali671000ChinaAbstractThecontentsofDOandnitrogenNphosphorusPchlorophyllainwaterfromLakeErhaiwereanalyzedbycombiningthenitrogenandphosphorusformsinsediment.TheresultsindicatedthattheDOcontentsofthewaterfromLakeErhaivariedfrom6.61to7.42mg/Lfrom1992to2009whichisgenerallydecreased.Theminimummeanvaluewas6.42mg/LinSeptember.ThetrendoftheDOcontentsfromnorthtosouthwasdecreasingandalsodecreasedwiththeincreasingofthewaterdepthinLakeErhaitheDOcontentwas5.15mg/Latthewaterbottom.TherelationshipbetweenthecontentsofDOandNPwasnegativeandtherelativityofdifferentmonthswasgreaterthanthatofdifferentyears.TherelationshipbetweenthecontentsofDOandthecontentsoflabile-Porganic-PNH+4-NinsedimentwasnegativewhichwaspositivewiththecontentsofFe/Al-PinorganicPandNO-3-N.TherelationshipbetweenthecontentsofDOandchlorophyllainwaterwasnegativewhichindicatedthatLakeErhaiisaerobicandisapproachinganaerobicgradually.WiththeincreasingofreleasedcontentofNandPtheincreasingofalgabiomasswasacceleratedandtheworseningofwaterbodyeutrophicationalsocanbepromotedbythedecreasedDOcontentinwaterfromLakeErhai.KeywordsErhaidissolvedoxygenphosphorusformsolubilitynitrogeneutrophication42km8.4km.1974m10.5m20.9m1.、、.23.dissolvedoxygenDO.DO4.DO5.7.5DOI:10.13227/j.hjkx.2011.07.0267mg·L-15mg·L-14mg·L-1DO2~5mg·L-12mg·L-1hypoxia0mg·L-1anoxia67..1992DODO.11.18“”.1992~20082001~20094.11720095~1210~14DO84、105、117、1420.5m2mDO33.200951010cm134.1.2DO.1mol/LKCl∶=10∶125℃1h200r/min5000r/min10min0.45μmNO-3-NNH+4-N.NH+4-N、NO-3-NSON.19Fig.1SchematicgeographicmapofLakeErhaishowingthesamplingsitesSMT10111g100mL50mL、、.1.IPOP.22.11992~2009DO2a.1992~2009DO6.61~7.42mg·L-119972006.31992~1996DO19971997~20062006~2009DO.2001~2009DO2b.DO6.42~7.74mg·L-119.DODO5mg·L-1.DO8.3591321Table1Sequentialextractionofphosphorusformsinsediments、、labileP100mL1g50mL1mol/LHN4Cl25±1℃200r/min0.5h5000r/min25℃10minRSP0.11mol/LNaHCO3-NaS2O350mL40℃200r/min1h5000r/min25℃10minFe2O3Fe/Al-P1mol/LNaOH50mL25±1℃200r/min16h5000r/min25℃10min、Ca-P0.5mol/LHCl50mL25±1℃200r/min16h5000r/min25℃10min2DOFig.2VariationofDOcontentinthewaterbodyofLakeErhaibyyear2009DO32009DO3aDO8.39~8.34mg·L-1.DO5.15~7.28mg·L-119.DO3b2mDO.DO22m15m.15m2m.1220mDO5.21mg·L-1.3DOFig.3VariationofDOcontentinthedifferentlayerswaterofLakeErhai459172.2DO2.2.1DOTN、TPTNTP.DOTNTP1992~20094a4bTPDOTNDO.DOTNTP2001~20084c4dDOTNTPTPDOp<0.01.DOTN、TP.TN、TPDO.DO.4DOTNTPFig.4RelationshipbetweenthecontentsofDOandTNTPinthewaterofLakeErhai2.2.2.labileP、RSP、Fe/Al-PCa-P10.DO5.labilePOPDOIP、RSPFe/Al-PDOFe/Al-PDOCa-PDO.labilePOPDORSP、Fe/Al-PIPDO.--DODOFe/Al-P1314.DO.DO..NH+4-N、NO-3-NON.5591325DOFig.5RelationshipbetweenDOinthewaterandmassfactionofphosphorusformsinthesedimentDO6NH+4-NDONO-3-NDODONDO.DONH+4-NNO-3-N.DONH+4-NNH+4-NDONH+4-NNO-3-NNO-3-N1516.NO-3-NNO+4-N.DO.6DOFig.6RelationshipbetweenDOinthewaterandmassfactionofnitrogenformsinthesediment2.2.3.ChlaDOChla7.DOChla.YChla=a×XDO+ba265917DOChla.19969~1017DO9DO9.DO.7ChlaDOFig.7RelationshipbetweentheChlaandDOinwateroflakeErhai33.1DO.120.9m18..DO.2.4~4.1m·s-140m·s-117DO2m.115m.20m10515mDO.DODODO.3.2DO、DO.1920DO.DO.6、792DO9.DO-21.--DO1314DONH+4-NNH+4-N1516.DO.3.3DODO.DOChlaDO“”5.DO19977199832191997DO.75913219、10m4m.1920..1.DO.DO.2324232425K-r-26.27suspendedfeedersdepositfeeders28.DO..411992~2009DO6.61~7.42mg·L-1DO6.42~7.74mg·L-19.2mDODO5.15mg·L-12m15m2.DO.2DO、.DO.DO.DODO.3DO.DO.DO.1.DNAJ.2004224672-675.2.J.20041780-85.3.J.200526538-42.4.J.2008362183-187.5.M.1998.11-13.6ChenCCGongGCShiahFK.HypoxiaintheEastChinaSeaOneofthelargestcoastallow-oxygenareasintheworldJ.MarineEnvironmentalResearch2007644399-408.7.J.D2002328687-694.8.J.20053171-7378.9.J.D2004342130-138.10.J.2008203315-322.11HupferMGachterRGiovanoliR.TransformationofphosphorusspeciesinsettlingsestonandduringearlysedimentdiagenesisJ.AquaticSciences1995574305-324.12.-、J.200022619-21.13./J.2008155227-233.14BandoR.Sedimentschemistryandtoxicityofin-placepollutantsM.MichiganLewisPublisher1990.131-144.15.、J.2005144507-511.16LiuJJWangJQXuWX.Effectsofenvironmentalfactorson85917NH+4releaseinsedimentfromChao-hulakeJ.AgriculturalScience&Technobgy200893153-156.17.R.20072958.18.J.D2004342130-138.19.J.20051811-4.20.J.200423101-103.21BeutelMWLeonardTMDentSRetal.EffectsofaerobicandanaerbiocconditionsonPNFeMnandHgaccumulationinwatersove