| 引用本文: | 李素菊,吴倩,王学军,朴秀英,戴永宁.巢湖浮游植物叶绿素含量与反射光谱特征的关系.湖泊科学,2002,14(3):228-234. DOI:10.18307/2002.0306 |
| LI Suju,WU Qian,WANG Xuejun,PIAO Xiuying,DAI Yongning.Correlations Between Reflectance Spectra and Contents of Chlorophyll-a in Chaohu Lake. J. Lake Sci.2002,14(3):228-234. DOI:10.18307/2002.0306 |
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| 摘要: |
| 利用高光谱地物光谱仪在巢湖进行了反射光谱测量和同步水质采样分析.在分析巢湖水体反射光谱特征的基础上,通过研究水体光谱反射率与叶绿素浓度之间的关系,利用反射率比值法和一阶微分法分别建立了叶绿素a的遥感定量模型.结果表明反射率比值R705nm/R680nm和 690nm反射率的一阶微分均与叶绿素a浓度有较好的相关性,且用反射率比值法估算叶绿素a效果较好. |
| 关键词: 叶绿素 反射光谱 遥感 巢湖 |
| DOI：10.18307/2002.0306 |
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| 基金项目:高等学校优秀青年教师教学科研奖励计划;国家自然科学基金委员会创新群体科学基金(40024101)联合资助 |
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| Correlations Between Reflectance Spectra and Contents of Chlorophyll-a in Chaohu Lake |
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LI Suju1,2, WU Qian1,2, WANG Xuejun1,2, PIAO Xiuying1,2, DAI Yongning1,2
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1.Key Laboratory for Surface Processes, Ministry of Education;2.Departmentof Urban and Environment Sciences, Peking University, Beijing 100871, P. R. China
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| Abstract: |
| Chaohu Lake is one of the biggest freshwater lakes of China.This study was conducted to establish correlations between reflectance spectra and contents of chlorophy ll-a in Chaohu Lake, which was in eutrophic status.Reflectance spectra were measured during November, 2001 by using ASD FieldSpec HandHeld radiometer.Water samples for chlorophyll-a measurements and dominant algal species determination were collected at the same time.The features of the spectral reflectance of the lake were discussed.The correlation between the spectral ref lectance of single band and the contentof chlorophyll-a was low.The reflectance ratio of R705nm/R680nm and the reflectance first-derivative of 690nm were found to be significantly correlated with the contents of chlorophyll-a, and the r2 gained using the reflectance ratio was higher than gained from the reflectance first-derivative of 690nm's. |
| Key words: Chaohu Lake chlorophyll-a spectral reflectance remote sensing |
