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1、第27卷第3期環(huán)境科學(xué)學(xué)報(bào)Vol.27,No.32007年3月ActaScientiaeCircumstantiaeMar.,2007王艷紅,鄧正棟,馬榮華.2007.基于實(shí)測(cè)光譜與MODIS數(shù)據(jù)的太湖懸浮物定量估測(cè)[J].環(huán)境科學(xué)學(xué)報(bào),27(3):509-515WangYH,DengZD,MaRH.2007.SuspendedsolidsconcentrationestimationinLakeTaihuusingfieldspectraandMODISdata[J].ActaScientiaeCircumstantiae,27(3):509-515基于
2、實(shí)測(cè)光譜與MODIS數(shù)據(jù)的太湖懸浮物定量估測(cè)1,22,33王艷紅,鄧正棟,馬榮華1.解放軍理工大學(xué)氣象學(xué)院,南京2111012.解放軍理工大學(xué)工程兵工程學(xué)院,南京2100073.中國(guó)科學(xué)院南京地理與湖泊研究所,南京210008收稿日期:2006203207修回日期:2006212201錄用日期:2006212229摘要:以太湖為研究區(qū)域,對(duì)太湖水體的水面反射光譜進(jìn)行實(shí)地測(cè)試,并取樣在實(shí)驗(yàn)室進(jìn)行水質(zhì)分析;根據(jù)光譜分析得到的懸浮物特征波段,估測(cè)懸浮物濃度;最后,對(duì)比MODIS波段,用最敏感波段及主成分分析法建立懸浮物估測(cè)模型.結(jié)果表明,576nm附近的反射率峰
3、值、841nm處反射率一階微分值和808nm附近的反射峰高與懸浮物濃度都有較好的相關(guān)性,其中峰高法和一階微分法對(duì)懸浮物濃度的估測(cè)精度相當(dāng);MODIS波段1與懸浮物濃度相關(guān)性最好,經(jīng)過(guò)主成分變化后的第一主成分和第二主成分可以較好地估測(cè)懸浮物濃度.因此,可利用MODIS數(shù)據(jù)對(duì)太湖懸浮物進(jìn)行長(zhǎng)期動(dòng)態(tài)監(jiān)測(cè).關(guān)鍵詞:反射光譜;MODIS數(shù)據(jù);懸浮物;主成分分析;太湖文章編號(hào):025322468(2007)0320509207中圖分類號(hào):X87文獻(xiàn)標(biāo)識(shí)碼:ASuspendedsolidsconcentrationestimationinLakeTaihuusingfi
4、eldspectraandMODISdata1,22,33WANGYanhong,DENGZhengdong,MARonghua1.Instituteofmeteorology,PLAUniversityofScienceandTechnology,Nanjing2111012.EngineeringInstituteofEngineeringCorps,PLAUniversityofScienceandTechnology,Nanjing2100073.NanjingInstituteofGeographyandLimnology,ChineseAcad
5、emyofSciences,Nanjing210008Received7March2006;receivedinrevisedform1December2006;accepted29December2006Abstract:TakingLakeTaihuasthestudyarea,thefieldreflectancespectrumwasmeasured,andthein2situwatersampleswerecollectedandanalyzedinthelab.Afteranalyzedthespectrumfeatures,suspended
6、solids(SS)concentrationwereestimatedbyfieldspectra.ThenbythecomparisonofthebandsofMODISandthecorrelationbetweenSSandMODISbandsreflectivity,theprincipalcomponentanalysis(PCA)wereanalyzed.Themostpracticableband,thefirstandthesecondprincipalcomponentwereselectedtoeducetheestimationmo
7、dels.Theresultsshowthatthepeakvaluenear576nm,thepeakheightnear808nm,andthefirstderivativeat841nmhavegoodcorrelationswithSSconcentration.Amongthese,theestimationprecisionsofthetwolaterareclose.ThecorrelationbetweenMODISband1andSSconcentrationismorecorrespondingthantheotherbands.The
8、precisionstoestimateSSusingthefir