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当前位置:首页 > 商业/管理/HR > 质量控制/管理 > 北京半城子水库水体营养物质表观沉降速率
341420147ACTAECOLOGICASINICAVol.34No.14Jul.2014http//.ecologica.cn2013-06-102014-04-21*Correspondingauthor.E-mail68283847@qq.comDOI10.5846/stxb201306101627..201434144107-4115.JiaoJLangCYangYZhengJJYangJJ.ApparentsettlingvelocityofnutrientsinBanchengziReservoirBeijing.ActaEcologicaSinica201434144107-4115.焦剑12*郎从1杨扬1郑娟娟1杨俊杰11.1008752.100048。TN55.5mm/dTP25.2mm/dTP。。TN。P。。ApparentsettlingvelocityofnutrientsinBanchengziReservoirBeijingJIAOJian12*LANGCong1YANGYang1ZHENGJuanjuan1YANGJunjie11StateKeyLaboratoryofEarthSurfaceProcessesandResourceEcologySchoolofGeographyBeijingNormalUniversityBeijing100875China2ChinaInstituteofWaterResourcesandHydropowerResearchBeijing100048ChinaAbstractBeijingissufferingaseverewatershortageinrecentdecadesandthisproblemwillbemoreseriousinfutureundertheinfluenceofurbanexpansionandpopulationincreasing.Severalstudieshavebeenconductedonthenutrientsprobleminthewaterbodyorupper-riversofMiyunreservoirinpast20years.Howeverthestudiesconcerningthisissuehavelongignoredtheconnectionofnutrientsdeliverybetweentheupper-riversandMiyunreservoir.Withoutthisconnectionitisdifficulttosimulatethenutrientsdeliveryprocessesfromriverstoreservoir.Theapparentsettlingvelocitycanquantitativelyrepresenttheneteffectofdifferentprocessesthatdelivernutrientstosediments.Toestimatetheapparentsettlingvelocityofnutrientsinthispresentstudy213watersampleswerecollectedfromBanchengzireservoirandtheupper-riverwatershedin2009—2010.ThetotalnitrogenTNnitrateNO-3-NammoniumNH+4-NtotalphosphorusTPandindexofpotassiumpermanganateCODMnwereanalyzedtoestimatethefluxofnutrients.Basedontheanalysisofmassbalanceandseasonalvariationsofnutrientstheapparentsettlingvelocitywascalculatedandthepotentialaffectingfactorswerealsoanalyzed.TheresultsshowedthattheapparentsettlingvelocityfornitrogenandphosphorusoftheBanchengzireservoirwere55.5mm/dand25.2mm/drespectively.Comparedwithmanyoflakesandreservoirsaboardtheapparentsettlingvelocityforphosphoruswasslower.Thisindicatedthatendogenousphosphoruswasslowlyreleased.Theapparentsettlingvelocityofthereservoirwasinfluencedbysurfacetemperatureandconditionsofdisturbanceofwaterbody.Moreovertheseasonalvariationofapparentsettlingvelocitycanbeobviouslyfound.Theapparentsettlingvelocityfornitrogenwasincreasedwiththeincreasingsurfacetemperatureofwaterbodyhowevertheincreasingtrendofhttp//.ecologica.cnphosphorouswasnotobvious.Theapparentsettlingvelocityfornitrogenwasrapidlyincreasedwhentheriverwaterflowingintothereservoirandthespeedwas3timesfasterthanbefore.Moreoveraftertheriverwaterflowedintothereservoirtheapparentsettlingvelocityforphosphorusshowedarapidlyincreasingtrendinthefirstmonthandthendecreasedrapidlyfortheresuspendedsedimentssettled.Theresultsofthisstudycanprovidescientificguidanceindevelopingtheconservationplanforthewaterqualityofupper-riverbasinofMiyunReservoir.KeyWordsnutrientsmassbalanceapparentsettlingvelocityBanchengziReservoir。。20901。。、2-3。904-6N、P16。7-8。。。。9。。。11.110km、、。19761020m30.372km2。12100m100—300m23m11.7m。66.1km2。250—800m10.2℃669mm75%6—8。52400。。、、.bjwater.gov.cn2009—2010。1.2、。。20096201011。2———120108—122。801434http//.ecologica.cn8。44。90%5—10。400m400m5。3。1。1417182。。1Fig.1Distributionofthesamplingpoints22010Fig.2Dateforthesamplingofriverrunoffin20101.3。NO-3-N、NH+4-N、TN、TPCODMn。NO-3-N10NH+4-N11TN12TP13CODMn14。901414http//.ecologica.cnTN、TPCODMnNO-3-NNH+4-N。1.439ν=Msettlingc0·As·dt1!m/dayAsm2c0kg/m3dtdMsettlingkgMsettling=Min+V0c0-Vtct-Vout·cout2Minkg。mkg/m3m2。V0c0m3kg/m3。。Vtctm3kg/m3。Voutcoutm3kg/m3。。1.8m244.0m13.1km。201011308.2m347.0%1.23m3/s。201011。NN23Fig.3Settlinglossescalculatedasfluxofmassacrossthesediment-waterinterfaceN2O。7N。-3NNH+4-N。22.1。200943。NH+4-N4。。2010812282.0m368.0%。。TNNO-3-N8.65mg/L5.97mg/LTNNO-3-NTNNO-3-N4。NH+4-N0.24mg/LNH+4-N49.3%NH+4-N0.49mg/L0.34mg/L。TP0.03mg/L0.01mg/L。TP。CODMn2.1mg/LCODMn3.7mg/LCODMn011434http//.ecologica.cn4.0mg/L。N、PCODMn。4TN、NO-3-N、NH+4-N、TPCODMnFig.4MonthlynutrientsconcentrationsinthewaterbodyofBanchengziReservoirandtheriversenteredit2.21200911201010706.0mm。。200911TN4247.8kg200911201010TN22909.9kg27157.7kg。1Table1CalculationofmassbalancefornutrientsinthewaterbodyofBanchengziReservoirCirculationofnutrients/kgTotalamountofnutrientsTNTPCODMn200911NutrientsinwaterbodyofthereservoiratthebeginningofNovember20094247.837.814684.2200911201010NutrientsfromairprecipitationduringNovember2009toOctober20101447.34.7752.4200911201010NutrientsfromupperriversduringNovember2009toOctober201021462.619.05379.5200911201010*DepositionandabsorptionfornutrientsduringNovember2009toOctober2010-9087.4-14.39972.7201010NutrientsinwaterbodyofthereservoirattheendofOctober201018070.347.230788.8*201010TN18070.3kg66.5%。200911111414http//.ecologica.cnTP37.8kg200911201010TP23.7kg61.5kg。201010TP47.2kg76.7%。200911CODMn14684.2kg200911201010CODMn6131.9kg20816.1kg。201010CODMn30788.8kg47.9%。CODMnCODMn。N、P。2.32.3.15TNTP。TN55.5mm/dTP25.2mm/d。、。5TNTPFig.5ApparentsettlingvelocitiesforTNandTPinBanchengziReservoirTNTP。。TPHigginsKim15P18-246.6—737.0mm/d115.6mm/d。27WalkerKihner16P-2.7—34
本文标题:北京半城子水库水体营养物质表观沉降速率
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