Abstract: The Ebinur Lake basin has an area of 5.06×104 km², a farmland area of 3.4×105 hm² and a population of 9. 0×105.After Kuytun River was dammed in the beginning of the 1980's and no longer flows to Ebinur Lake, the water consumption for the ecology in the basin has to be completely based on the water resources of Bortala and Jinghe rivers. Thus, the shrinkage of Ebinur Lake is sped up, the contradiction between the demand and the supply of water resources becomes sharper, and the ecological environment in the basin is seriously degenerated. This paper analyzes the relations between the changes of occurrence of sandstorms, occurring days of strong wind, precipitation, evaporation, stream water flowing into Ebinur Lake, water area of the lake, etc., based on the data of strong winds collected by the Alataw and Jinghe meteorological stations and the data of sandstorms collected by Jinghe Meteorological Station during the period of 1961～2000.The relations between the change of sandstorm occurrence, precipitation and stream water flowing into the lake in recent years are analyzed based on the data of dust-fall in Bole City during the period of 1997～2000.The results show that the decrease of the stream water flowing into Ebinur Lake and of precipitation results directly in the increase of sandstorm occurrence. Thus, the wetland ecological environment in the Ebinur Lake region is increasingly degenerated, which seriously impacts the social and economic development in Bortala Mongol Autonomous Prefecture and even in east Xinjiang. Some measures for improving the wetland ecological environment in the Ebinur Lake region are put forward in the paper.

Key words: wetland ecological environment, sandstorm, water resources, Ebinur Lake