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AN ANALYSIS ON EVOLUTION TREND OF ECOLOGICAL ENVIRONMENT IN THE IN-MIGRATION AREA OF THE SHULE RIVER BASIN

ZHang Qianl; Zhang Tao; Xiao Yongkang;Wei Qiong; Zhang Zhiliang(Institute of Resources and Environment, Lanzhou University, Lanzhou 730000) )  
The essay comprehensively va1ues the ecological environment in the in - migrationarea at the val1ey of the Shule River, In the in - migration aren, the environment is veryfragile and the deterioration in some regions is very serious. However, it is rich in the resources of light, heat, water and soil, with great potential of development. Besides, the essay emphatically demonstrates that the allocation change of water resources caused by theirrigation works will bring about many advantages and only a few disadvantages to the environment. Meanwhile, the essay ana1yses that washing salt, draining water and improvingsoil will not only do little harm to the water quality of Shuangta Reservoir, but also are advantageotls to Baiqibao wasteland and Huahai Basin. The conclusion is reached that, to develop the in - migration area will affect natrtlal vegetation in some regions. but, with theincrease of utilization ratio of water resources. and the enlargement of oasis, economic, social and ecological profits will be obvious. In general, it will benefit the ecological environment and form a virtuous cycle.
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