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《Journal of Arid Land Resources and Environment》 2007-07
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The Assessment on the Ecological Security of Land Use in the Farming-Pastoral Zone of Northern China

MA Ying(School of Humanities and Social Sciences,Beijing Institute of Petrochemical Technology,Beijing 102617,China)  
The assessment of land use is the core and base of the study on sustainable land use.All estimating indices are graded from very insecurity(Ⅰ),relative insecurity(Ⅱ),critical security(Ⅲ),relative security(Ⅳ) and very security(Ⅴ) by given quantitative criterions.Based on GIS technology,the ecological security of land use of 192 counties in the farming-pastoral zone of Northern China was evaluated by using Gray Comprehensive Assessment method.Then comprehensive weight coefficient matrix of objects was acquired.In general,the maximum component can be selected from the comprehensive weight coefficient matrix of objects to determine the evaluated result.The means to determine it follows maximal subjection grade principle.Conclusions indicated that:(1) as a whole,the ecological environment security of land use of every county was inferior in 1989 and 2000.Most counties belonged toⅠ-class regions in 1989,butⅠ-class counties were only five in 2000.the security of most counties was up to Ⅱ-class in 2000.(2) The ecological security of land use of most counties was more superior in 2000 than in 1989,which indicated the ecological environment quality was improved in 2000.(3) Only 4 counties belonged to Ⅲ-class region in 1989,however,they were added up to 24 in 2000 and mainly located in Daxingan mountain and alluvial plain area of northeastern China and Loess plateau of northern Shaanxi.(4) No county reached Ⅳ class in 1989,and only one in 2000.No any counties reached Ⅴ class in 1989 or in 2000.The ecological security problem of land use is still serious in a later period.
【CateGory Index】: X826
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