Abstract
The study takes Shiyang River Basin as a study area, and bases on resource environment-population, social economy-ecological environmental stress and response, and combines the present situation of ecological environment in Shiyang river basin as well as its influencing factors to construct the comprehensive evaluation index.The results show that:(1)The quality of eco-environment in Shiyang River Basin is low, and it shows the descendent trend year by year. The comprehensive evaluation index of ecological environment decreased from 5.05 in 2000 to 3.70 in 2012.(2)Seen from spatial distribution, the order of the descending degrees of the comprehensive evaluation index of ecological environment in Shiyang river basin in recent year is Yongchang County, Su yugur autonomous county, Liangzhou district, Gulang county, Tianzhu Tibetan autonomous country, Minqin county and Jinchuan district.(3) Inside the Shiyang River Basin, because of the dual effects from natural conditions and human activities, the eco-environment in the main ecological barrier regions such as Minqin and Wuwei oasis have changed obviously, especially in MinQin oasis.
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