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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)測光譜與MODIS數(shù)據(jù)的太湖懸浮物定量估測[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)測光譜與MODIS數(shù)據(jù)的太湖懸浮物定量估測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,對太湖水體的水面反射光譜進(jìn)行實(shí)地測試,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,估測懸浮物濃度;最后,對比MODIS波段,用最敏感波段及主成分分析法建立懸浮物估測模型.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懸浮物濃度的估測精度相當(dāng);MODIS波段1與懸浮物濃度相關(guān)性最好,經(jīng)過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懸浮物濃度.因此,可利用MODIS數(shù)據(jù)對太湖懸浮物進(jìn)行長期動態(tài)監(jiān)測.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:025322468(2007)0320509207中圖分類號:X87文獻(xiàn)標(biāo)識碼: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
