长江中游城市群经济-城市-社会-环境耦合度空间差异分析

以长江中游城市群的36个城市为例,构建了经济发展、城市化、社会保障、生态环境综合评价指标体系,运用耦合度模型评估了36个城市2011~2013年的耦合度,并利用GIS技术分析系统的得分与耦合度的空间分布特征。结果表明:长江中游城市群的36个城市的经济发展、城市化和社会保障水平的空间分布比较相似,三者间存在显著的正相关关系。但是,存在显著性的地区差异。36个城市生态环境得分均值很高,城市之间差异很小。从耦合度的空间分布来看,长江中游城市群明显存在3个高耦合度的聚集区域,即长株潭城市圈,武汉-南昌(含鄂州、黄石和九江)城市带和鄂北4市,即十堰、襄阳、宜昌和荆门。最后,36个城市之间耦合度的差异呈现逐年缩小的趋势。

SPATIAL DIFFERENCES IN COUPLING DEGREES OF ECONOMY,URBANIZATION, SOCIAL SECURITY AND ECO-ENVIRONMENT IN THE MIDDLE REACHES OF YANGTZE RIVER

In this paper,comprehensive evaluation indicators were constructed for the evaluation of economic development,urbanization,social security and eco-environment,and the coupling degrees of 36 cities in the middle reach of Yangtze River during 2011-2013 were calculated by means of the coupling degree model.The GIS technique was used to analyze spatial distribution of values of 4 systems and coupling degrees of 36 cities.The results showed that the 36 cities were very similar in terms of development levels of economy,urbanization and social security,and had similar spatial distributions in terms of these three systems.The three systems were positively correlated with each other.Particularly,the average values of the three systems were low,while their variation coefficients were very high.It indicated that there were huge and significant differences in economic development,urbanization and social security among the 36 cities.However,regarding eco-environment,the 36 cities had high average values and low variation coefficients.In terms of spatial distribution,there were three obvious clusters of high coupling degrees,i.e..Chang-Zhu-Tan city cluster,Wuhan-Nanchang economic belt (including Ezhou,Huangshi and Jiujiang),and 4 cities in the North Hubei Province (Shiyan,Xiangyang,Yichang and Jingmen).Finally,the difference of coupling degrees of the 36 cities seemed to show a declining trend.