熵视角下的广州城市生态系统可持续发展能力分析

通过对城市生态系统的结构和功能分析, 以及城市作为耗散结构系统的熵变分析, 构建广州城市生态系统可持续发展能力评价指标体系;运用信息熵构建了广州城市生态系统可持续发展能力评价模型;将熵权与指标时间序列变化相结合, 分析指标时间序列变化对广州城市生态系统可持续发展能力的影响, 从而提出广州城市生态系统可持续发展的针对性措施。研究结果显示:在2004-2010 年间, (1) 广州市社会经济生态系统对自然生态系统的需求不断增大, 城市环境污染问题得到有效控制, 城市生态系统内部不断朝着有序、健康的方向发展;(2) 自然生态系统对社会经济系统的支持能力总体逐渐上升, 生态环境的改善使广州城市生态系统的协调性和活力得到增强, 城市生态系统可持续发展能力总体呈上升趋势。该研究方法能反映出城市作为复合生态系统的结构、功能和演化机制, 能有效地弥补城市可持续发展研究中所存在的可持续发展对策比较笼统、缺乏针对性的不足。

Analysis of sustainable development ability of the urban ecosystem in Guangzhou City in the perspective of entropy

The research has been carried out in three steps. Firstly, the evaluation index system of sustainable development ability of the urban ecosystem was formed based on the structures and functions of the urban ecosystem and the entropy change of the urban socio-economic ecosystem. Secondly, the sustainable development ability assessment model for the urban ecosystem was built up based on information entropy. Lastly, through combining the time series variation of the evaluation indicators with the entropy weights, this paper analyzed its influence on the sustainable development ability of the urban ecosystem in Guangzhou, and then put forward some countermeasures to promote the urban ecosystem sustainable development in Guangzhou. The main conclusions of this study could be summarized as follows: (1) The urban ecosystem developed in an orderly and healthy direction with the effective control over the urban environmental pollution problems in Guangzhou between 2004 and 2010. Meanwhile the requirements of the socio-economic ecosystem on the natural ecosystem continuously grew with the rapid socio-economic development in the city. (2) On the whole, the sustainable development ability of the urban ecosystem had been on an upward trend in Guangzhou during the study period. What's more, the ability of the urban natural ecosystem to support the urban socio-economic ecosystem continuously showed an increasing trend and the improvement of ecological environment enhanced the harmony and vitality of the urban ecosystem in Guangzhou.