Recent Lake Changes in the Arid Area of Northwest China

Recent lake changes in the arid area of Northwest China are described,and the causes of the changes are discussed.It is found that these changes have some impacts on environment and ecosystems of lakes,including deterioration of climatic conditions,extension of desert area, disappearance of forest,regression of vegetalion cover,and reduction of fishing yield caused by the impeded fishs breeding.Besides,considering the causes of lake changes,some suggestions and measures to prevent further changes of these lakes are proposed.