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1、农业环境科学学报2012,31(12):2473-2479JournalofAgro-EnvironmentScience基于TM影像的克钦湖叶绿素a浓度反演李苗，臧淑英*，吴长山（黑龙江省普通高等学校地理环境遥感监测重点实验室，哈尔滨师范大学，哈尔滨150025）摘要：为了研究扎龙湿地克钦湖的富营养化情况，利用准同步实测数据和Landsat-5/TM数据反演整个克钦湖的叶绿素浓度。在对叶绿素光谱特征研究的基础上，选取TM2、TM3、TM4单波段及其11种波段组合与叶绿素a浓度进行相关性分析，将相关系数较大的3种波
2、段组合分别建模，得到3个估算叶绿素浓度的反演模型，选择精度较高的模型Y=41.57×（TM3+TM4）-0.697反演了克钦湖叶绿素a浓度。通过分析结果得出：克钦湖的水体叶绿素浓度分布总体上是南湖比较低，北湖较高，大的趋势是由南向北递增。这与准同步水质采样数据基本吻合，反映了克钦湖富营养化状态的实际情况。该模型可以较好地估测克钦湖水体叶绿素a的浓度，可以满足该水体叶绿素a含量定量监测的需要，对水体水质的动态监测和预警提供理论依据。关键词：叶绿素a；遥感技术；克钦湖；TM数据中图分类号：X524文献标志码：A文章编号
3、：1672-2043(2012)12-2473-07InversionofChlorophyll-aConcentrationBasedonTMRemoteSensingImageinKeqinLakeLIMiao,ZANGShu-ying*,WUChang-shan（KeyLaboratoryofRemoteSensingMonitoringofGeographicEnvironment,CollegeofHeilongjiangProvince,HarbinNormalUniversity,Harbin1500
4、25,China）Abstract：Theconcentrationofchlorophyll-anotonlyreflectthewaterplanktonbutalsothedistributionofprimaryproductivity.Thechangeofconcentrationisoftenusedasabasicindicatortomeasuretheextentofwatereutrophication.InordertoinvestigatetheeutrophicationofKeqinL
5、ake,chlorophyll-aconcentrationwasinversedbasedonthequasi-synchronousmeasureddataandLandsat-5/TMimageofKeqinLake.Byresearchingthespectralcharacteristicsofchlorophyll-a,correlationanalysiswasmadebetweenthechlorophyll-aconcentrationandthe14kindsofcombinationsofTM
6、2,TM3andTM4.Then3modelswereestablishedbyresultswhichcorrelationcoefficientwerehigher.Finally,chlorophyll-aconcentrationofKeqinLakewasinversedbysuitablemodelwhichwasY=41.57×（TM3+TM4）-0.697.Theresultsshowedthatchlorophyll-aconcentrationofKeqinLakewasrelativelylo
7、wonthewholesouthlake,highonthenorthlakeandwithaincreas－ingtendencyfromsouthtonorth,whichwasconsistentwiththequasi-synchronousmeasureddata,andactuallyreflecttheeutrophicationsit－uationofKeqinLake.Whichcausedbytherearemuchcultivatedlandaroundnorthlake,andmuchree
8、dwhichcanpurifythewaternearbysouthlake.Themodelcouldaccuratelyestimatechlorophyll-aconcentrationofKeqinLake,andcouldsatisfytherequirementforquantitativemonitoringofchlorophyll-acon
