大气湿沉降对河道型水源水库富营养化贡献数模研究

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吴琼,崔树彬,罗欢,徐礼强510611:根据国内外对大气湿沉降的研究成果,初步分析了大气湿沉降对河道型水源水库富营养化的影响。以寻乌县九曲湾水库为例,建立了二维水量水质耦合模型,预测了在一场典型降雨后水库TN、TP的浓度场分布,分析氮、磷营养盐大气湿沉降对水库富营养化的影响,并在此基础上总结九曲湾水库富营养化的主要成因,为水库的富营养化治理提供参考。大气湿沉降;河道型水源水库;富营养化;水量水质耦合模型TV211.1B1001-9235201405-0008-045100915610451061101005309Yk914005。2014-06-25。0。30%~40%1。2-3。。N、P。1。、、。。。Zhang451.4×10103×108t/a。58%75%。ChungNH4-NNO3-N12.6%6。WhitalNorthCarolinaNeuse11kg/hm2·a50%。NeuseN7。。N、PN、P48.8%46.2%8。N、P9-11。122002—2003TIN。132007TN6958tTN。142008—2009TNTP10868t247t18.6%11.9%。。2。415m3238m371km2。20143、、chla4211。820145·PEARLRIVERdoi10.3969/j.issn.1001-9235.2014.05.00311mg/L19.33<10.01.500.1861.260.04028.88<10.02.140.2181.500.06238.82<10.02.960.2571.580.0262、g/kg17.788.824.30.1614512.544.958.42.920.58614.391.321.60.121379.4337.254.62.730.5720.657.42.190.04451.2722.68.40.420.09223.0829.1466.470.1072.6926.8824.5034.8464.250.1670.1424.00注:土壤背景值深层和浅层的取值,表层土(0~20cm)和深层土(110~115m)[16]1。12IV3V13III2IV。2、3。20143《》3。3201401-11%-----14%----------200802000.4525090±%“+”“-”3N、P3.1aht+1CξCηξHuC()η+ηHvC()[]ξ=qCξCηut+uCξuξ+vCηuη+uvCξCηCξη-v2CξCηCηξ=fv-gCξhξ+Eξ1CξAξ-1CηB()η-guC2Hu2+v槡2vt+uCξvξ+vCηvη+uvCξCηCηξ-u2CξCηCξη=-fu-gCηhη+Eη1CξBξ+1CηA()η-gvC2Hu2+v槡2A=1CξCηξCη()u+ηCξ()[]vB=1CξCηξCη()v-ηCξ()[]uu、v———ξ、ηEξ、Eη———Cξ、Cη———LamiCξ=x2ξ+y2槡ξCη=x2η+y2槡ηh———mq———m3/sH———mg———m/s2f———。b()HCt+1CξCηξCη()HuC+ηCξ()[]HvC=1CξCηξHDξCηCξC()ξ+ηHDηCξCηC()[]η+qC0CξCη-kHCC———kg/m3H———mu、vξ、ηm/sDξ、Dη———ξ、ηm2/sq———m3/sC0———kg/m3k———1/d。Dζ=DL|u|u2+v槡2+DN|v|u2+v槡2Dη=DL|v|u2+v槡2+DN|u|u2+v槡2DL———DN———。3.297404。2。CFL<1。0.3s。CFL=槡gh+uΔtΔx+槡gh+vΔtΔy。3.3、2.7km2.7km0.20km2。。5m3/s352m。352m。3.420143。233.5TN、TP。。4—6。6266.6mm。10mm/d。15、2.83~6.25mg/L0.038~0.25mg/L6.25mg/L0.25mg/L。456TN7TP3.64、50~0.02m/s“Y”0.01m/s0.005m/s20m10.002m/s。TN、TP6、7TN、TP“Y”TN、TPTN0.4mg/LTP0.02mg/L“Y”0.001m/s01TN、TPTN2.0~6.25mg/LTP0.2~0.25mg/LTN0.4~2.0mg/LTP0.02~0.2mg/L。、III~IVV。。4TN、TP、a、。b、。c0~0.02m/s“Y”0.01m/s20m0.002m/s。d、TN、TP“Y”TN、TPTN0.4mg/LTP0.02mg/L“Y”TN2.0~6.25mg/LTP0.2~0.25mg/LIII~IVV。。。1.J.2002116575-578.2.J.2005244402-405.3.J.200525141-42.4ZHANGJLIUMG.Observationonnutrientelementsandsul-phateinatmosphericwetdepositionoverthenorthwestPacificcoastaloceansYellowSeaJ.MarChem199447173-189.5ZHANGJCENSZYUZG.Factorsinfluencingchangesinrain-watercompositionfromurbanversusremotregionsoftheYellowSeaJ.JGeophsRes19991041631-1644.6CHUNGCSHONGGHKIMSHetal.ShorebasedobservationonwetdipositionofinorganicnutrientsintheKoreanYellowSeacoastJ.TheYellowSea1998430-39.7WHITALLDHENDRICKSOBPAERLH.Importanceofatmos-phericallydepositednitrogentotheannualnitrogenbudgetoftheNe-useRiverestuaryNorthCarolinaJ.EnvironmentInternational2003292393-399.8.、J.2007382104-110.9GALLOWAYJNDENTENERFJCAPONEDGetal.NitrogencyclespastpresentandfutureJ.Biogeochemistry2004702153-226.10PAERLHWDENNISRLWHITALLDR.Atmosphericdeposi-tionofnitrogenimplicationsfornutrientoverenrichmentofcoastalwatersJ.EstuariesandCoasts2002254677-693.11TAMATAMAHRAHECKYREDUTHIEHC.Thearmospher-icdepositionofphosphorusinLakeVictoriaEastAfricaJ.Bio-geochemistry2005732325-344.12.J.2005173226-230.13.、J.20092145-10.14.J.201124111210-1219.15.J.2011392012304-12306.16.J.2005223171-175.(责任编辑:李泽华)11

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