基于能值-生命力指数的城市生态系统健康集对分析

综合考虑城市的生命体特征及物质能量代谢层面因素,依托城市生命力指数框架,结合能值指标,构建城市能值-生命力指数,以全面反映城市生态系统健康状况.引入集对分析这种不确定理论与方法,比较城市生态系统相对健康状况.采用基于集对分析的城市能值-生命力指数综合评价模型及信息熵权重,比较北京、上海、武汉、广州等16个城市的生态系统相对健康状况,结果表明,厦门、青岛、杭州、上海、北京健康水平相对较高,而乌鲁木齐、成都、哈尔滨健康水平相对较低,其他城市则为中等水平.

Set pair analysis for urban ecosystem health assessment based on emergy-vitality index

Integrating the vitality characteristic of urban ecosystem and situation of energy and materials metabolism, the urban emergy-vitality index was constructed to comprehensively represent the urban ecosystem health status by incorporating the emergy-based indices into the framework of urban vitality index. Set pair analysis (SPA), which objectively treats and systematically measures the uncertainty level, was introduced to assess the relative health status of the urban ecosystem. Through the integrated SPA-based urban emergy-vitality assessment model and the indicator weights determined by information entropy method, the relative health status based on urban emergy-vitality index among each urban ecosystem was estimated, by choosing sixteen typical Chinese cities including Beijing, Shanghai, Wuhan, Guangzhou, etc. as study objects. The urban ecosystem health states of Xiamen, Qingdao, Hangzhou, Shanghai and Beijing were better, while those of Urumchi, Chengdu and Harbin were relatively worse.