Remote-sensing assessment of regional inland lake water clarity in northeast China |
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| Authors: | Hongtao Duan Ronghua Ma Yuanzhi Zhang Bai Zhang |
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| Institution: | (1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008 Nanjing, China;(2) Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Shatin, NT, Hong Kong;(3) Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, 130012 Changchun, China |
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| Abstract: | Water clarity in three lakes, Chagan, Xinmiao, and Kuli, in northeast China was evaluated based on Landsat TM data and in
situ measurements in this study. The agreement between satellite data and water clarity from field-collected Secchi disk depth
(SDD) for individual lakes was strong (0.72 ≤ R
2 ≤ 0.98), and four regression equations were used to estimate SDD values. Lake clarity showed strong geographic patterns:
Lake Chagan had low clarity and Lake Xinmiao and Kuli had high clarity. The study indicates that Landsat TM can be effectively
applied to estimate water clarity for inland lakes in the area. |
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| Keywords: | Secchi disk depth Lake Chagan Satellite data |
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