应用HJ CCD传感器指数的鄱阳湖TSM浓度遥感监测

Monitoring TSM by HJ CCD Imagery Index in Poyang Lake

分别于2008年10月、2009年10月和2011年7月对鄱阳湖地区开展三个航次的科学调查,在分析实测数据基础上,利用TSM浓度应用HJ卫星CCD传感器数据,提出一种TSMI遥感反演的新方法,并与传统基于实测光谱与TSM浓度建立的方法对比分析,模型反演平均相对误差分别为17.5%和20.01%。实验结果显示,利用TSMI指数方法反演结果较优,不仅可以提高TSM浓度遥感反演精度,而且有利于解决内陆浑浊水体遥感监测中水色大气校正算法研究不足的问题。

Poyang Lake is the largest freshwater lake in China, with dramatic variation of the water total suspended matter （TSM） concentration. Three cruises of investigation data were collected in Oct 2008, Oct 2009 and Jul 2011 in Poyang Lake. A total suspended matter in- dex （TSMI） approach was used with data from HJ satellite charge coupled device （CCD） in- struments to characterize the TSM concentration. The result showed that accuracy of total suspended matter retrieval model was improved. The model established by between TSMI and in-situ TSM concentration, and the model built by remote sensing reflectance and in-situ TSM concentration were compared. The TSMI method with high accuracy for the inland tur- bid water of Poyang Lake, was more effective way to monitor TSM concentration by remote sensing.