The Protection Methods And The Change Of Ecological Environment Of Ejina Oasis After Water Let In It

Since near a century ,with the expanding population and advancement of the technology ,people strengthen the domanial using continuously, and lead enlarging the range of use and adding the intensity of use land constantly,for the satisfying increasing demand of people oneself. Changed the upper configuration ,circle of biological physics and chemistrys and balance of biological species and leading change of the global climates and decrease of biological species which can not rverse .Because changes of land coverage/land use have effect largely on sustainable development of the environment .Land coverage/land use change is recognized one of mainly two factors leading the global change,occupied important status in the field of sustainable development. The oasis is regarded as a elite of the ecological sight in the northwest drought area in China ,it reflects the ecological environment status in this area and supports the social economic development in the whole northwest area .The degeneration of the oasis will directly induce the serious course of desertification ,indulge in wilful persecution in dust storm and produce the number of ecological refugee .Furthermore it restrict the economic and social development in northwest area ,threatens the exist and development of the whole Chinese .Obviously ,in the course of the build of the development campaign of the western regions ecological environment, surrounding the"turn the desert green"strategy ,do well the water resource safety ensure and direct the activity of the northwest desert regress the oasis practice ,and it is"one important problem ,that must be studied and resolved firstly". The Ejina oasis belongs to sensitive and fragile section of ecological environment, which has the representative rescue and protection of oasis transferring water from Heihe,and the ecological status of the Ejina oasis is important, and the deterioration of the ecological environment of the Ejina oasis is serious. Therefore, intensifying the study on the changes of land use after the Ejina oasis transfer water,it not only has the important strategetic meaning in quickening the vegetation restoration in this area, and improving the ecological environment and promoting the economic social sustainable development, but also it offers practical case of the transfer water engineering in the other western country area, and improving the ecological environment in northwest desertification area, and protecting and reasonably using numbered oasis, and has the important use for reference.This paper based on the transfer water from Heihe river, by comparing the changes of land use of former and after transfer water in Ejina, and studied the benefits of ecological and social economy since the transfer water was carried out, and tried to explore the pattern of land use in this area. The results showed: After starting dispart water of upper reaches and lower reaches of the Heihe river in 2000 and comprehensive treatment of full basin in 2001, it prevented the shrinking of natural oasis and the degradation trend of lower reaches ecology. Though the restoration speed of oasis is limited, it has developed positively. For the future, except the more strengthen managing of full basin and carry out scientific allocation of water, insure supply of oasis of lower reach of Heihe river, and it is important to base on itself, and take various measures and establishes the pattern of saving water—land use, and guarantees the sustainable development of Ejina oasis.