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The 250m 16-day composite EOS/MODIS products (MOD13Q1) from 2000 to 2006 were chosen for monitoring annual and seasonal variation of Gahai Lake area. And the effects of meteorological factors on Gahai Lake were also discussed. The method of single band with threshold value was applied to lake extraction. The results showed that in 2000~2002 Gahai Lake often dried up, but the lake water appearance...
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