城市生态安全的多种评价模型及应用

为了对城市生态安全水平与评价方法进行研究,以深圳和4个中央直辖市为研究对象,根据压力-状态-响应(PSR)模型,构建了城市生态安全评价指标体系并采用层次分析与熵值相结合的优化方法,综合确定权重运用改进的灰色关联度法、物元可拓综合法、模糊综合法和主成分投影法等4种评价模型,对上述城市2006年生态安全水平进行了测算、分析与评价,并对评价模型进行了对比探讨。结果表明:(1)深圳生态安全水平最高,依次为北京、天津和上海,重庆最低;深圳、北京和天津生态安全等级为较安全,上海为临界安全,重庆为不安全;上海发展潜力最大,深圳、北京与天津较大,重庆仍最小。(2)在对城市生态安全评价研究中,模糊综合法与物元可拓综合法评价结果较全面、精确,其中模糊综合法更利于有针对性地分析问题。

Several assessment models and application analysis of urban ecological security

This paper aims at exploring the urban ecological security level and assessment methods,and providing the scientific basis for the policy of the assessment and management on the urban ecological security.Shenzhen and four municipalities are taken as case studies to contrive an evaluating index system of urban ecological security depending on the Pressure-Status-Response(PSR)model.Firstly,the authors use four kinds of assessment models to simulate urban ecological security levels for those cities in 2006.A c...