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《Journal of Glaciology and Geocryology》 2003-02
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Analysis on Causes of the Water Level Variation of Ebinur Lake in Recent 50 Years

WANG Qian jin 1 , Bayinchahan 1 , MA Dao dian 1 , ZENG Qing jiang 1 ,JIANG Feng qing 2 , WANG Ya jun 2 , HU Ru ji 2 (1. Hydrological and Water Resources Reconnaissance Bureau of Boertala Prefecture, Bole Xinjiang 833400, China;2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, rümqi Xinjiang 830011, China)  
Three stages, rapid shrunk from 1950 to 1977, remained stable in 1980's and escalated in 1990's, have been experienced in the process of evolution of Ebinur Lake in recent 50 years. During the period of 1950-1977,the lake area shrunk rapidly from 1 070 km 2 to 522 km 2 due to large amount of the river water were drawn into the cropland. In 1980s, the lake area remained stable at about 500 km 2 . Main causes for this can be attributed to the broken off of Kuitun River, a tributary of the lake, and the stable water discharges from Boertala River and Jinghe River. In the valleys of the two rivers, the river waters drawn into the cropland are strictly restricted by the unique hydrological features of the rivers. Since 1990's, the area of the lake enlarged yearly. According to the analysis of the hydrological records, the rivers in the lake watershed are just in a plentiful water period. Meanwhile, the precipitation in Boertala River valley increased obviously. Abundant precipitation helped to release the agricultural drought and decrease the waters drawn from the rivers. Hence, water discharges drained into the lake in 1990's increased much more than that in 1980's. It should be pointed out that abundant river waters are not the result of the melting of the glaciers in catchment of the lake but the result of climatic wetting. The rapid enlargement of the lake's area is a natural phenomenon of climatic variation of dry and wet, and can not be related with the agricultural water saving.
【Fund】: 中国科学院知识创新工程重大项目 (KZCX1 10 0 6;KZCX2 3 0 1) ;; 中国科学院新疆生态与地理研究所知识创新工程项目(2 0 0 0 10 14 )资助
【CateGory Index】: P343.3
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