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《Journal of Lake Sciences》 2010-03
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Application of factor analysis method in water quality parameters inversing

SHI Kun,LI Yunmei,WANG Qiao,YANG Yu,JIN Xin,WANG Yanfei,YIN Bin & ZHANG Hong (MOE Key Laboratory of Virtual Geographic Environment,Nanjing Normal University,Nanjing 210046,P.R.China)  
Field experiments were conducted on Lake Taihu in November 2008 and April 2009,and on Lake Chaohu in June 2009.The water remote sensing reflectance was analyzed by factor analysis method.Furthermore,Chlorophyll and total suspended matter concentration were inversed using different factors of remote sensing reflectance,and universality of inverted factor was verified too.Chlorophyll concentration of Lake Taihu in spring was inversed by the first factor,and relative error and root-mean-square error are 22.1%and 3.48g/L,respectively.However,this method failed in inversing of autumn of Lake Taihu and Lake Chaohu. Concentration of total suspended matter was inversed by the second factor,and relative error and root-mean-square error were 13.9%and 11.33mg/L,respectively.This method was suitable in Lake Chaohu and autumn of Lake Taihu.Applicability of the first factor of remote sensing reflectance to inverse chlorophyll concentration was limited,and applicability of the second factor of remote sensing reflectance to total suspended matter concentration was certain universal.
【Fund】: 国家自然科学基金项目(40971215)和国家自然科学基金重点项目(40730527)联合资助
【CateGory Index】: X832
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