长江中游城市群空间结构演变及效应分析

Spatial Structure Evolution and Effect Analysis of Urban Agglomeration in Middle Reaches of Yangtze River

城市群作为支撑区域经济高质量发展的重要载体,合理的空间结构是城市群实现空间效应最大化的重要保障。基于"密度-规模-网络"城市群空间结构分析框架,借助数理分析、空间分析和空间计量模型,测度了2007~2017年长江中游城市群空间结构时空演化特征及其多中心结构空间效应。结果表明:(1)"小经济集团"日益显著,成为城市群发展的新兴地区,环鄱阳湖城市群是全区协调发展短板,九江、新宜萍地区出现跨区融合趋势;(2)城市群形成紧密联系网络,经济联系城市组团、交通轴带性集聚显著,跨行政区联系薄弱,外围城市经济联系有待增强;(3)长江中游城市群集聚水平不高,溢出效应不显著,人力资源、工业化水平、政府参与与交通基础设施均是促进区域经济发展的正向因素,未来应促进要素梯级集聚,打破行政壁垒,增强跨区联系,完善交通网络,创造溢出新通道。

As an important carrier to support the high-quality development of the regional economy, urban agglomerations, a reasonable spatial structure is an important guarantee for urban agglomerations to maximize their spatial effects. Based on the “density-scale-network” urban agglomeration spatial structure analysis framework, this paper uses mathematical analysis, spatial analysis and spatial measurement models to measure the spatial and temporal evolution characteristics of the urban agglomeration in the middle reaches of the Yangtze River from 2007 to 2017 and its multi-center structure spatial effects. The results show that:(1) “Small economic groups” have become increasingly prominent and have become emerging areas for the development of urban agglomerations. The Poyang Lake City Cluster is a shortcoming in the coordinated development of the entire region, and the Jiujiang and Xinyiping areas have a trend of cross-regional integration;(2) Urban agglomerations form a tightly connected network, with significant clusters of economically connected cities and significant traffic axial agglomeration, weak cross-administrative ties, and economic ties in peripheral cities need to be strengthened;(3) The level of urban agglomeration in the middle reaches of the Yangtze River is not high, the spillover effect is not significant, and human resources, Industrialization level, government participation and transportation infrastructure are all positive factors that promote regional economic development. In the future, we should promote the clustering of factors, break administrative barriers, strengthen inter-regional connections, improve transportation networks, and create new overflow channels.