Chlorophyll-a concentration is an important indicator for estimating the eutrophication degree of a lake. Taking advantage of the water qualities experimental data on 27 and 28 October, 2003, the paper constructs the chlorophyll-a concentration estimating model for Taihu Lake, China. And then, the study uses this chlorophyll-a concentration estimation model to estimate the seasonal distribution pattern of chlorophyll-a concentration from CBERS-1 imageries on 5 April, 28 April, 16 May, 5 August, and 30 October of 2006, and 5 July, 2007. According to the research results, it was found that the chlorophyll-a concentration is lower in summer and higher in autumn and winter, and could illuminate the four stages of phytoplankton growth in a year; Compared with the previous study repons, the chlorophyll-a concentration is higher than the actual concentration by estimating from the CBERS-i. There are still some problems for applying the CBERS-1 imageries to water qualities remote sensing,which should be improved by further study.%叶绿素a浓度是衡量湖泊富营养化程度的重要指标.采用太湖2003年10月27日和28日的水质实验数据,构建了太湖叶绿素a浓度反演模型.然后将该模型应用于2006年4月5日、4月28日、5月16日、8月5日、10月30日和2007年7月5日的6期CBERS-1影像数据,研究与探讨了太湖叶绿素a浓度在上述时间尺度上的变化状况.通过研究可知,太湖叶绿素a浓度在夏季较低,而在秋季和冬季较高,基本上能反映浮游植物年际生长的4个过程;与以往的研究对比分析可知,基于CBERS-1影像数据反演获取的叶绿素a浓度比实际浓度总体偏高,CBERS-1数据影像在水色遥感中的应用仍然有待进一步的研究与探索.
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