caa a22 4500 445892439 CHVBK 20180317145620.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10750-011-0652-1 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0652-1 Development of optical criteria to discriminate various types of highly turbid lake waters [Elektronische Daten] [Deyong Sun, Yunmei Li, Qiao Wang, Chengfeng Le, Changchun Huang, Kun Shi] Our aim was to refine the optical classification of turbid waters in order to improve the performance of water color algorithms. Bio-optical measurements and sampling of optically active substances were performed in highly turbid lakes Taihu, Chaohu, and Dianchi, and in Three Gorges reservoir in China. Based on strong correlations between trough depths of remote sensing reflectance (R rs(λ)) near 680nm (denoted as TD680) and the ratios of inorganic suspended matter (ISM) to total suspended matter (TSM) concentrations, an empirical model was developed for water classification. In the 400-900nm spectral range, different correlations between R rs(λ), TSM and chlorophyll a (Chla) concentrations indicate discrepancies among the following ISM/TSM ranges: ISM/TSM≤0.5, 0.5<ISM/TSM<0.8, and ISM/TSM≥0.8. Corresponding findings support an important conclusion that only high ISM/TSM ratios, usually above 0.5, and using the more sensitive and stable near infrared spectral range (730-820nm), can assure good performances of the TSM remote sensing algorithms. Meanwhile, the particulate absorption a p(λ) and scattering b p(λ) were strongly influenced by different ranges of ISM/TSM ratios. Typically the a p(675) peaks became more and more vague as ISM/TSM increased, and the b p(λ) values first decreased and then increased with a marked inflexion at ISM/TSM≈0.5. The TD680 threshold values were derived to discriminate three types of turbid waters, i.e., Type 1 (TD680≥0.0082sr−1), Type 2 (0.0082sr−1>TD680>0sr−1), and Type 3 (TD680≤0sr−1). This study provides a promising tool for identifying various types of highly turbid waters, and is significant for the development of class-based algorithms of water color remote sensing. Springer Science+Business Media B.V., 2011 ISM/TSM ratio nationallicence Td680 criteria nationallicence Particulate absorption nationallicence Particulate scattering nationallicence Optically complex and highly turbid waters nationallicence Sun Deyong College of Remote Sensing, Nanjing University of Information Science & Technology, Nanjing, JiangSu, China aut Li Yunmei Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut Wang Qiao Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut Le Chengfeng Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut Huang Changchun Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut Shi Kun Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut Hydrobiologia Springer Netherlands 669/1(2011-07-01), 83-104 0018-8158 669:1<83 2011 669 10750 https://doi.org/10.1007/s10750-011-0652-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0652-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sun Deyong College of Remote Sensing, Nanjing University of Information Science & Technology, Nanjing, JiangSu, China aut NATIONALLICENCE 700 1- Li Yunmei Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut NATIONALLICENCE 700 1- Wang Qiao Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut NATIONALLICENCE 700 1- Le Chengfeng Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut NATIONALLICENCE 700 1- Huang Changchun Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut NATIONALLICENCE 700 1- Shi Kun Ministry of Education, Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Nanjing, JiangSu, China aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 669/1(2011-07-01), 83-104 0018-8158 669:1<83 2011 669 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer