基于模糊集对分析法的土地生态安全评价——以扬州市为例

摘要

Based on the concernning data of land ecological security of Yangzhou municipal city from 2001 to 2010,this paper constructed a land ecological security evaluating index system for Yangzhou municipal city from three aspects of pressure,state and response and the entropy method was used to determine the weight of each evaluating index,and based on this,the fuzzy set pair analysis method was used to evaluate the land ecological security starus and trends of Yangzhou municipal city from 2001 to 2010.The results are shown as follows:(1)Overall,in 2001-2010,the land ecological security degree of Yangzhou municipal city showed an upward trend.In 2001-2007,the land ecological security degree kept rising from level Ⅲ to level Ⅱ.But in 2008,it had a decline with fluctuation returnning to the level Ⅲ.After 2009,the land ecological security degree started to improve gradually,keeping at the level Ⅰ.(2)The fuzzy set pair analysis method was simple and easy to operate,meanwhile the results were objective and reasonable.So the fuzzy set pair analysis method has application value in land ecological security assessment.%基于2001-2010年扬州市土地生态安全的相关数据,从压力、状态、响应3个方面建立土地生态安全评价指标体系,并采用熵权法确定各评价指标的权重,在此基础上,运用模糊集对分析法对研究期内扬州市土地生态安全状况进行定量评估和变化趋势分析.结果表明,研究期内扬州市土地生态安全状况总体呈趋好态势,其中,2001-2007年扬州市土地生态安全状况持续上升,从Ⅲ级水平迅速转变为Ⅱ级水平,2008年出现波动性下降,又回到Ⅲ级,2009年后土地生态安全状况逐渐开始好转,变为Ⅱ级；运用模糊集对分析法进行土地生态安全评价,结果客观合理,方法简单、易操作,又对土地生态安全评价具有一定的应用价值.