武汉城市圈城市空间相互作用时空演变分析

引入人口重心、GIS网络分析及时序全局主成分分析法对传统引力模型进行修正,由此测算城市潜力值,以定量测度2002~2013年武汉城市圈城市空间相互作用强度,并结合IDW空间插值法和CTCSTP算法揭示出其时空演变规律。结果表明:(1)武汉城市圈各城市与其他城市间相互作用总强度总体呈增长趋势,其中武汉市增幅远高于其他城市,其与孝感-鄂州-黄石形成显著的轴线式发展格局,其余城市始终为空间联系弱区地带。(2)武汉市辐射带动作用日趋强劲,辐射范围逐年扩大并呈现一定的"圈层式"分布,其余城市辐射带动作用较弱,仅孝感市略显对外辐射趋势。(3)整个区域的空间相互作用表现出显著的"西南部低、北部高、东部适中"的空间分异特征,且其重心由南向北转移明显,区域发展不均衡特性显著。

SPATIO-TEMPORAL EVOLUTION OF SPATIAL INTERACTION AMONG CITIES OF WUHAN METROPOLITAN AREA

The time-serial generalization principal component analysis and the combined methods of GIS network analysis and population gravity center's acting as the node in network are used to modify to measure the potential values of cities,which is used for the quantitative measurement of spatial interaction among cities of Wuhan Metropolitan Area from 2002 to 2013.And its law of the spatio-temporal evolution is revealed based on IDW method and CTCSTP algorithm.The results show that:(1) The potential value of each city in Wuhan Metropolitan Area,the sum of spatial interaction between a city and other cities,has been gradually strengthened as a whole,among which of Wuhan city keeps increasing at a highest pace.Moreover the "Wuhan-Xiaogan-Ezhou-Huangshi" development axes has formed generally.However the potential values of other cities are at low level.(2)Wuhan city shows a significant role in external radiation whose effect expands and enhances constantly in the form of a circle and Xiaogan city begins to give slight play to radiate effect.But other cities don't.(3) The spatial interaction in Wuhan City agglomeration shows a crucial spatial differentiation,low in the Southwest,high in the North,moderate in the East,and its gravity center moves significantly from the south to the north as time went by,which shows the obviously imbalanced development.