熵权模糊综合评价法在城市生态安全评价中的应用

Application of entropy weight and fuzzy synthetic evaluation in urban ecological security assessment.

为了拓新城市复合生态系统生态安全评价方法的研究,根据压力-状态-响应模型,构建了一个有3个要素和33项具体指标的城市生态安全水平度量的指标体系,并运用客观的熵权法赋权、模糊综合评价法以及划分的等级标准对我国5个经济发达城市的生态安全水平进行量化分析.结果表明,苏州市和北京市对“较安全”级别的隶属度最大,分别为0.376和0.286;深圳市、上海市和广州市则处于“临界安全”状态.另外,深圳市具有较大的系统压力,苏州市的系统状态和系统响应表现最优.与其它评价方法相比,该方法评价过程简易,结果定量和相对客观可信.

Ecological security is one of the foundations of regional security, and the basis of sustainable development. Urban ecological security refers to the ecological support and main ecological issues of a city, which do not threaten its survival and development. To develop the research method on the ecological security of urban social-economic-natural complex ecosystem, an assessment indicator system of urban ecological security was set up based on Pressure - State - Response Model, which included 3 key factors and 33 concrete items. The five most developed cities of China were taken as the cases to assess their ecological security situation by using entropy weight and fuzzy synthetic evaluation method. The results showed that the urban ecological security of Suzhou and Beijing was at relatively safe level, while that of Shenzhen, Shanghai and Guangzhou was critical safe in the year of 2003. The urban ecosystem of Shenzhen was under heavy press, while that of Suzhou behaved best both in system status and system response. Comparing with other assessment methods, this evaluation method was easier and more reasonable. The results were basically consistent to the fact of these cities, suggesting that the urban ecological security indicator system and the entropy weight and fuzzy synthetic evaluation approach were feasible to some extent.