基于熵权灰色关联分析的城市生态安全评价

Assessment of urban ecological security based on entropy-weighted gray correlation analysis

基于压力-状态-响应概念模型,构建区域生态安全评价指标体系。采用熵权法对各评价指标赋权,熵权赋权克服了多指标评价中主观确定权重的不确定性。建立安全评价指标标准,利用灰色关联方法计算重庆市的生态安全的关联度,以此对重庆市的生态安全做出评估。结果表明:该方法对城市生态安全进行熵权灰色关联评价的结果与实际相吻合,为区域生态安全定量化评价提供了新的手段,具有一定的实用价值和推广意义。

An assessment indicator system of regional ecological security was set up based on Pressure-State-Response Model. Entropy was used to determine the weights of assessment indicators, which avoided the uncertainty in estimating the weights subjectively. The standards of security assessment indictors were established, the correlation degree of ecological security in Chongqing was calculated by gray correlation analysis, and then, an assessment of Chongqing urban ecological security was made. The assessment result of the urban ecological security by the method of entropy-weighted gray correlation analysis was identical with actual situation, suggesting that this method offered a new means to quantitatively assess regional ecological security and had certain practical value and popularization meaning.