Analysis of dynamic changes and influence factors of Lake Balkhash in the last twenty years |
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Authors: | TANG Hai-long LU Shan-long CHENG Yan-pei GE Li-qiang ZHANG Jian-kang DONG Hua SHAO Huai-yong |
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Institution: | 1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100101, China. ;2.College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China. ;3.Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang 050061, China. |
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Abstract: | Lake Balkhash is the third largest inland lake in Central Asia after the Caspian Sea and the Aral Sea. The Ili River-Balkash Lake Basin resides in the southeastern part of the Republic of Kazakhstan and the western part of China's Ili Prefecture, which belongs to the arid and semi-arid region. In the middle to late 20th century, the Ili River-Balkash Lake Basin was affected by climate change and human activities, and the problems of water ecology and water resources became increasingly prominent, which became the focus of attention for China and Kazakhstan. In this study, the water level derived from radar altimeter data, the water surface area extracted from Landsat data, and the temperature and precipitation data in the basin were comprehensively utilised. Data analysis of the time course and correlation of hydrological, meteorological elements in the lake basin, water dynamic changes, and influencing factors of Lake Balkhash was studied. The results show that the cyclical change of regional climate is the main factor affecting the change of lake water, and human activities in the short term can regulate the change of water volume in Lake Balkhash. The research results in this paper can provide a scientific basis for the solution of water disputes in cross-border rivers between China and Kazakhstan. |
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Keywords: | Lake area Lake water level Remote sensing Remote sensing |
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