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《Arid Land Geography》 2008-02
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Assessment and dynamic analysis of the eco-environmental quality in the Ili River Basin based on GIS

WANG Hong-wei1,2,ZHANG Xiao-lei1,QIAO Mu1,MIAO Yan-jian3(1 Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China;3 Station for Environmental Monitoring of Iili Autonomous Region,Yining 835000,Xinjiang,China)  
The Ili River basin is located in the west of Xinjiang and on the north slope of the Tianshan Mountains.The administration divisions include eight counties and one city with an area of 5.63×104 km2.As a comprehensive and systematic research work,to evaluate the eco-environmental quality is necessary for exploiting nature resources,drawing plan of social and economic development,and protecting and constructing the eco-environment.Firstly,this paper introduces a comprehensive evolution method of eco-environmental quality which consists of five elements including biological abundance,vegetation coverage,net-water density,land degradation and pollution load,and evaluate the environmental quality of 9 county administration districts in Ili River Basin with data of remote sense monitoring between 2002 and 2005 by GIS technology.The results show that the eco-environmental quality in each county is close in general and shares middle grade,among which Xinyuan,Gongliu and Tekesi county,which locate in the upper of Ili River Basin,have a better quality than the others.Secondly,the paper discusses the availability of the comprehensive evolution method in the arid area.Thirdly,the paper analyzes the dynamic trend of eco-environmental quality by land area change of different grade for natural geographical unit in 2 years.The results show that the eco-environmental quality in the Ili River Basin takes on the trend which improve partly and degrade slowly in general.In the last we explain the reason of the dynamic change in nature.
【Fund】: 中国科学院新疆生态与地理研究所“伊犁河流域林业生态示范研究”(20045035)资助
【CateGory Index】: X826
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