Abstract:

      Because the artificial oasis took the place of the natural oasis, the function of natural oasis is weakening and nearly lost the ability of improving the environment, the habitat of wildlife and preserving the biological diversity in wild area. Since the Neolithic Age, the human being has emerged and evolved in this area, living mainly on hunting and herding, followed by herding and farming, and finally farming and herding. Therefore the human influence on the environment last a considerable long period of time. Since Qing Dynasty, especially after the foundation of new China (1949), the effect has increased sharply and been the dominant factor of the variation of environment in the latter-day, which presented on controlling of water resource, and so caused the change of water system, vegetation and desert etc.