Characteristics of the change of major lakes on the Qinghai Tibet Plateau in the last 25 years |
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Authors: | Zhaogang SHAO Xiangang MENG Dagang ZHU Daxing ZHENG Zijiang QIAO Chaobin YANG Jian'en HAN Jia YU Qingwei MENG Rongping L |
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Institution: | (1) Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, 100081, China;(2) Land and Resources Department, Xizang (Tibet) Autonomous Region, Lhasa, 850000, China |
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Abstract: | On the Qinghai-Tibet Plateau there are three super large lakes, the Qinghai Lake, Nam Co and Siling Co, and eleven large lakes,
the Zhari Nam Co, Tangra Yumco, Ayakkum Lake, Banggong Co, Har Lake, Ngoring Lake, Yamzho Yumco, Gyaring Lake, Chibuzhang
Co, Ulan Ul Lake and the Ngangla Ringco. The authors studied the changes of these major lakes in the past 25 years, based
on interpretations of the MSS images obtained during the middle 1970s and ETM+ images obtained in the late 1990s or at the beginning of the 21st century. The study shows that: the areas of the Har Lake
andNgoring Lake have remained relatively stable; the areas of the Qinghai Lake, Zhari Nam co, Tangra Yumco, Ayakkum Lake,
Gyaring Lake, Ulan Ul Lake and Ngangla Ringco have been reduced to varying degrees, of which the areas of the Qinghai Lake
and Ulan Ul Lake have decreased most sharply by 60.60 km2 and 59.80 km2 respectively; the areas of the Nam Co, Siling Co and Bangong Co have increased more or less, of which the area of the Siling
Co has increased most sharply by 140.42 km2. The analysis on the changes in areas of major lakes has provided new materials for the study of the lake evolution, climatic
change and environmental variation on the Qinghai-Tibet Plateau.
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Translated from Geological Bulletin of China, 2007, 26(12): 1633–1645 译自: 地质通报] |
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Keywords: | remote sensing investigation lake change Qinghai-Tibet Plateau |
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