ORIGINAL RESEARCH
Evaluating Ecological Vulnerability Using the GIS and Analytic Hierarchy Process (AHP) Method in Yan’an, China
Kang Hou, Xuxiang Li, Jingjing Wang, Jing Zhang
 
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School of Human Settlements and Civil Engineering, Xi'an Jiao tong University,
Xi’an, 710049, China
 
 
Submission date: 2015-06-18
 
 
Final revision date: 2016-01-07
 
 
Acceptance date: 2016-01-07
 
 
Publication date: 2016-03-17
 
 
Pol. J. Environ. Stud. 2016;25(2):599-605
 
KEYWORDS
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ABSTRACT
The degraded ecosystem in the Loess Plateau region of China is very vulnerable, which has a great impact on regional sustainable development. Taking the Loess Plateau of Yan’an, Shaanxi province, China, as the study area, this study quantitatively evaluated conditions of the ecological environment. Based on natural factors, environmental factors, and socio-economic factors of Yan’an in 1997, 2004, and 2011, the dynamic changes in ecological vulnerability are analyzed with the application software for geographic information systems (GIS). The analytic hierarchy process (AHP) model was used and it contains variables for land use, soil erosion, topography, climate, vegetation, and socio-economic data. The evaluation results are divided into fi ve categories: potential, slight, light, medium, and heavy. The results show that the ecological vulnerability in the study is light level, and the ecological vulnerability index of the southern four counties is lower than that of the northern four counties. Ecological environment quality gradually improved in most areas in 1997~2011.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
 
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