武汉城市圈路网通达性与经济联系时空演变及关联分析

Spatio-Temporal Evolution and Correlation Analysis of Road Network Accessibility and Economic Contact in Wuhan Metropolitan Area

交通可达性对区域城市经济联系与发展有重要影响。文章通过空间句法和引力模型,以1995、2005和2015年为时间断面,探讨分析了武汉城市圈不同尺度城市路网通达性与经济联系的时空演变格局,以及二者之间的关联性。结果显示:(1)研究期内,武汉城市圈道路网络整体连通性水平趋于完善,但存在空间极化,表现出以武汉市为中心的核心—边缘式空间格局;(2)区域内城市之间经济联系不断加强,在市级尺度上,武汉市经济辐射功能以及相邻城市间经济联系特征明显,在县级尺度上,长江经济带沿线城市经济联系更为密切;(3)2005年以后,全域范围内不同尺度城市的道路网络通达性格局与经济联系格局存在显著相关性,道路网络通达性提高对促进城市经济联系强度、提高城市在区域中经济联系中心性地位有重要作用,同时也加强了区域经济联系的空间异质性。

Traffic accessibility does great importance to the economic contact and development of urban areas. With data from 1995, 2005, and 2015, using space syntactic variables and gravity model, this paper investigated the spatio-temporal evolution of accessibility and economic contact of cities in Wuhan metropolitan area, and the relevance between the two aspects. We found that： 1） During study period, the accessibility of road network in Wuhan metropolitan area tended to be perfect, but space polarization did exist, showing a structure of center-marginal around Wuhan; 2） Economic contact between cities continued to strengthen, at municipal scale, the economic radiation function of Wuhan and the economic contact between adjacent cities were obvious, at county scale, counties along the Yangtze River Economic Belt contacted more; 3） Since 2005, there was a notable relevance between the accessibility pattern and economic contact pattern of cities at different scales, and it indicated that the improvement of road network accessibility played an important role in promoting the strengthen of economic contact and improving the central position of cities in the region, and it also strengthened the spatial heterogeneity of regional economic contacts.