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通过对城市生态系统和对城市生态系统的耗散结构进行熵变演化分析,构建了城市生态系统可持续发展能力评价指标体系;借鉴热力学第二定律中的熵变方程原理,运用信息熵构建了城市生态系统可持续发展能力评价模型;并以南京市为例,对南京市城市生态系统可持续发展能力进行实证研究,结果表明:2005~2012年南京市经济社会的发展对其城市生态系统带来了沉重的压力,但在政府部门的重视下,南京市城市环境污染问题业已得到有效的治理,南京市城市生态系统的生态承载能力在曲折中逐步上升,并呈现出逐步好转的趋势,对经济社会发展的支撑能力不断增强,已走在可持续发展能力不断增强的轨道上。
Through the analysis of the entropy change of the urban ecosystem and the dissipative structure of the urban ecosystem, the evaluation index system of the sustainable development of the urban ecosystem is constructed. Based on the principle of entropy change equation in the second law of thermodynamics, the information entropy is used to construct This paper takes Nanjing as an example to make an empirical study of the sustainable development of urban ecosystems in Nanjing City. The results show that: from 2005 to 2012, the economic and social development of Nanjing has a positive impact on the urban ecological system However, under the attention of government departments, the urban environmental pollution in Nanjing has been effectively controlled. The ecological carrying capacity of urban ecosystems in Nanjing is gradually increasing in twists and turns and showing a tendency of gradual improvement. The supporting capacity of economic and social development has been continuously enhanced and has been on the track of ever-increasing capacity for sustainable development.