A model for the retrieval of suspended sediment concentrations in Taihu Lake from TM images

作     者：GUANG Jie WEI Yuchun HUANG Jiazhu GUANG Jie;WEI Yuchun;HUANG Jiazhu

作者机构：Key Laboratory of Virtual Geographic Environment Ministry of Education Nanjing Normal UniversityNanjing 210097 China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2006年第16卷第4期

页      面：458-464页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 08[工学] 081601[工学-大地测量学与测量工程] 0705[理学-地理学] 0816[工学-测绘科学与技术] 070501[理学-自然地理学] 0704[理学-天文学] 

基　　金：National 863 Program, No. 2003AA131060 National Natural Science Foundation of China, No.40571110 

主　　题：suspended sediment TM image Taihu Lake 

摘      要：A study was conducted in the Taihu Lake with the aim of deriving a model for the retrieval of suspended sediment （SS） concentrations from Landsat TM images and in situ sampled data. The correlation between suspended sediment concentrations of lake and the reflectance obtained from the TM images is significant. By TM images and in situ sampled data in summer and winter, we obtained a comparative uniform model for the retrieval of suspended sediment concentrations in the Taihu Lake, that is lnSS = a＊（R3/R1） ＋ b, where lnSS is the natural logarithm of the suspended sediment concentration, Rl and R3 are the reflectance coincident with the 1st band and the 3rd band in TM images, a and b are the regression coefficients. Furthermore, we analysed the errors particularly to make sure the model is valid. The model is accurate to within 0.33（RMSE）, suggesting that this model may be applicable to predict suspended sediment in the Taihu Lake from TM image throughout the year.