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引用本文:吕恒,李新国,江南.基于反射光谱和模拟MERIS数据的太湖悬浮物遥感定量模型.湖泊科学,2005,17(2):104-109. DOI:10.18307/2005.0202
LV Heng,LI Xinguo,JIANG Nan.Estimation of Suspended Solids Concentration in Lake Taihu Using Spectral Reflectance and Simulated MERIS. J. Lake Sci.2005,17(2):104-109. DOI:10.18307/2005.0202
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基于反射光谱和模拟MERIS数据的太湖悬浮物遥感定量模型
吕恒1,2, 李新国1,2, 江南1
1.中国科学院南京地理与湖泊研究所, 南京210008;2.中国科学院研究生院, 北京100039
摘要:
利用地物光谱仪研究了太湖水体的反射光谱特征,通过对比分析,发现580nm反射率值和810nm的反射峰高是太湖悬浮物的敏感波段,并通过光谱微分的方法,发现840nm附近的一阶微分与悬浮物浓度相关性最好,基于上述结论,分别建立了太湖悬浮物的反射光谱和一阶微分遥感定量模型,并利用反射光谱数据,模拟MERIS数据的波段设置,结果表明MERIS第5、12、13波段可以很好的估测太湖的悬浮物浓度.
关键词:  悬浮物  反射光谱  MERIS  遥感定量模型  太湖
DOI:10.18307/2005.0202
分类号:
基金项目:中国科学院知识创新项目(KZCX3-SW-331)江苏省自然科学基金项目(BK2002149)联合资助.
Estimation of Suspended Solids Concentration in Lake Taihu Using Spectral Reflectance and Simulated MERIS
LV Heng1,2, LI Xinguo1,2, JIANG Nan1
1.Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China
Abstract:
Lake Taihu is the third biggest freshwater lake in China.This study was conducted to establish remote sensing algorithms for the retrieval of suspended solids concentration in Lake Taihu.Reflectance spectral were measured on 13th of Nov.2003 by using ASD FieldSpec HandHeld radiometer.Water samples for suspended solids concentration,chlorophyll-a, DOG measurements were collected at the same time.Based on the comparison and analysis of the reflectance spectral, the reflectance of 580nm was found to be sensitive to the SSC, in this band, the difference of SSC can be maximum showed, and the peak height of 810 nm was found to have higher correlation with SSC than other bands and can be used for index of SSC, The significantly correlation between the concentration of suspended solids and the reflectance first-derivative of 840nm was also found in this research by using spectral derivative technology.Through simulating MERIS data based on reflectance spectral, it was found that the 5,12,13band can be effectively used to retrieve SSC.
Key words:  Suspended Solids  Spectral Reflectance  MERIS  Remote Sensing Algorithm  Lake Taihu
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