长江中游城市群空间结构效益比较与优化研究

基于OpenStreetMap公路路网和社会经济数据,利用可达性分析及空间相互作用引力模型,从规模效益、距离效益、空间联系效益3个方面对2017年长江中游城市群的空间结构效益进行比较分析。研究发现:武汉城市圈城市紧凑度高,平均可达性最好,内部联系强度大,空间凝聚力强;长株潭城市群在人口及经济规模上具有明显优势,中等联系层面网络趋于完善,一体化程度高,但空间可达性差;环鄱阳湖城市群综合竞争能力弱,空间联系松散且较弱,但空间可达性较好。未来,长江中游城市群的发展可以从重构区域发展空间结构、加强不同等级规模城市梯度建设、构建综合交通运输网、建立区域发展协调机制和促进产业生态绿色发展等方面寻找着力点。

Reach on Comparison and Optimization of Spatial Structure Benefits of Urban Agglomeration in the Middle Reaches of the Yangtze River

Based on the OpenStreetMap highway network and socio-economic data,the accessibility analysis and spatial interaction gravitational model were used to compare and analyze the spatial structure benefits of the urban agglomeration in the middle reaches of the Yangtze River in 2017 from three aspects:scale benefit,distance benefit,and spatial connection benefit.The results show that Wuhan urban circle has high space and compactness,the best average accessibility,strong internal connections,and strong spatial cohesion;urban agglomeration around Changsha-Zhuzhou-Xiangtan has obvious advantages in population and economic scale,with poor spatial accessibility,the network at the medium connection level tends to be perfect and the degree of integration is high;urban agglomeration around Poyang Lake has weak comprehensive competitiveness,good accessibility,the relationship between them is loose and weak.In the future,the development of urban agglomeration in the middle reaches of the Yangtze River can focus on:a spatial development structure is proposed,and optimization countermeasures such as strengthening the gradient construction of cities at different levels,constructing comprehensive transportation network,establishing regional development coordination mechanisms,and promoting the green development of industrial and ecology.