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Retrieval of chlorophylla and suspended solid concentrations by hyperspectral remote sensing in Taihu Lake, China

  • Chemistry
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Abstract

Chlorophylla (chl-a) and suspended solid concentrations are two frequently used water quality parameters for monitoring a lake. Traditional measurement of chl-a and suspended solids, requiring laborious laboratory work, which is often expensive and time consuming. Hyperspectral remote-sensing measurement provides a fast and easy tool for estimating water trophic status.In situ hyperspectral data on March 7–8, July 6–7, September 20 and December 7–8, 2004 and the corresponding water chemical data were used to regress the algorithm of water quality parameters. Results showed that the peak of water leaving radiance around 700 nm (R 700) varied proportionally with chl-a concentration, and moved to infrared when algal bloom occurred. The reflectance ratio ofR 702/R 685 was well correlated with chl-a when water surface in no algal bloom case and the correlation coefficient was better if absorption of phycocyanin was considered. The reflectance ratioR 620/R 531 was highly correlated to the concentration of suspended solids. The relationship between suspended solids and other band groups were also compared. Secchi disk depth could be calculated by non-linear correlation with suspended solids concentration.

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Authors and Affiliations

  1. Key Laboratory of Tropical Marine Environmental Dynamics (LED), South China Sea Institute of Oceanography, Chinese Academy of Sciences, 510301, Guangzhou, China

    Yang Dingtian

  2. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, 310012, Hangzhou, China

    Yang Dingtian, Pan Delu, Zhang Xiaoyu, Zhang Xiaofeng & He Xianqiang

Authors
  1. Yang Dingtian
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  2. Pan Delu
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  3. Zhang Xiaoyu
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  4. Zhang Xiaofeng
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  5. He Xianqiang
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  6. Li Shujing
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Corresponding author

Correspondence to Yang Dingtian.

Additional information

Supported by National Natural Science Foundation of China (No. 40576078), Natural Science Foundation of Guangdong Province (No. 5003685), Post-Doctor Foundation of China, Post-doctor Foundation of Zhejiang Province, Post-Doctor Foundation of Shanghai and the National High-Tech R&D of China (863 Program) (No. 2002AA639490)

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Dingtian, Y., Delu, P., Xiaoyu, Z. et al. Retrieval of chlorophylla and suspended solid concentrations by hyperspectral remote sensing in Taihu Lake, China. Chin. J. Ocean. Limnol. 24, 428–434 (2006). https://doi.org/10.1007/BF02842860

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  • DOI: https://doi.org/10.1007/BF02842860

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