SCIENTIA GEOGRAPHICA SINICA ›› 2007, Vol. 27 ›› Issue (1): 92-97.doi: 10.13249/j.cnki.sgs.2007.01.92

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Extraction of Chlorophyll-a Concentration Based on Spectral Unmixing Model in Taihu Lake Water

WEN Jian-Guang1, XIAO Qing1,2, LIU Qin-Huo1, ZHOU Yi1   

  1. 1. SLRSS, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101;
    2. Beijing Research Institute of Uranium Geology, Beijing 100029
  • Received:2005-08-19 Revised:2005-12-24 Online:2007-01-20 Published:2007-01-20

Abstract: Thematic Mapper(TM) data can be used to estimate chlorophyll-a concentration of water body and monitor the quality of inland water.There are different models for TM estimating Chlorophyll-a concentration,and the major model is empirical regression model.In this paper we build chlorophyll-a models based on TM data,in which the traditional band ratio approach and mixing spectral analysis model were used.And we also analyzed the method of end-member extraction.The correlation coefficient and rooted mean square errors were calculated,and the results of chlorophyll-a concentration gained from these models and those gained from the analysis in lab were compared,the result shows that the mixing spectral model for estimating Chlorophyll-a concentration is a optimal method.

CLC Number: 

  • TP79