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时间:2019-05-19
《三峡水库干流氮和磷含量的季节变化》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第28卷第5期V01.28No.52012年10月Oct.2012三峡水库干流氮和磷含量的季节变化曾凡海,张晟,熊强,吕平毓。,兰峰1.重庆市涪陵区环境监测站,重庆4080002.重庆市环境科学研究院,重庆4011473.长江上游水环境监测中心,重庆400020摘要:三峡水库威库后对6个水平断面、4个垂直断面采样分析,对水体水质参数、不同化学形态N以及不同物理形态P的水平分布和垂直分布进行了研究。研究结果表明,成库后TP、NH一N、NO;一N、NO;一N、IN含量范围分别在0.O6~0.34、0.01~0.72、0.002~0.100、0.76~2.09、0.855~2.52mg/L。
2、TP分布为丰水期>平水期>枯水期,受悬浮物沉降中ElV。的影响,TP在水库区域含量低于上游区。枯水期、平水期水体中TP以可溶解态为主,丰水期以颗粒态为主。NO;一N、nNO;一N、IN含量均为平水期>枯水期>丰水期。水体中IN以NO;一N为主,占IN70%~90%。NO;·N比例最低,占国IN3.5%以下。表明水体虽受成库影响流速减缓,但水体依然有较强的自净能力。垂直分布上,TP、IN在3个层次变化a环不显著,未出现分层现象。各采样站点TP、NO;一N、IN通量和流量有显著相关。o关键词:三峡水库;氮;磷;季节变化境mr监唔中图分类号:X824;X524文献标志码:A文章编号:1002
3、·6002(2012)05_0029-04测aSeasonalVariationofNitrogenandPhosphorusinThree-GorgeReservoirZENGFan—hai,ZHANGSheng,XIONGQiang,LVPing—yu,LANFeng1.FulingDistrictEnvironmentalMonitoringStationofChongqing,Chongqing408000,China2.ChongqingResearchAcademyofEnvironmentalScience,Chongqing401147,China3.TheupperY
4、angtzeRiverWaterEnvironmentMonitoringCenter,Chongqing400020,ChinaAbstract:Throughsamplingandanalysisof6horizontalstationsand4verticalstationsinThreeGorgesarea,thespatialvariationofwaterqualityparameter,diverseformsnitrogenandphosphoruswererevealedinFeb.,MayandAug.,2004.ConcentrationofTP,NH3一N,NO
5、;一N,NO;一N,INrangedfrom0.06—0.34mg/L,0.01—0.72mg/L,0.002—0.100mg/L,0.76—2.09mg/L,0.855—2.52mg/L,respectively.TPvalueofreservoirareaisnormalbeyondupstream.Duetoparticulatedeposition,concentrationofTPinfloodseasonishigherthannormalanddryseason.Themainformofphosphorusisdissolvedphosphorusinnormaland
6、dryseason.Particlephosphorusismainformsofphosphorusinfloodseason.PollutionofnitrogenisseriousinThree—gorgereservoir.ConcentrationofNO;一N,N0—N,INishigherinnormalseasonthandryandfloodseason.NO;一NisthemainformsofINandtherateofNO;一NinINrangedfrom79%一90%.TherateofNO/一NinINwasthemostlowestandrangedbel
7、ow3.5%.Throughwaterflowslowerthanbefore,theabilityofwaterself-purificationwasstillstrong.Onverticaldirection,variationofNandPwerenotnotableanditwasnotlayered.TherewassignificantcorrelationbetweenTP,NO;一N,INloadandwaterdischa
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