江苏省城市网络空间结构演化特征与驱动机制

Evolution Characteristics and Driving Mechanism of Urban Network Spatial Structure in Jiangsu Province

以江苏省13个地级市为例,运用修正引力模型测度2000~2012年各城市间联系强度,通过社会网络分析方法(SNA)对江苏省城市网络空间结构演化特征及驱动机制进行了探讨。结果表明:2000~2012年江苏城市网络整体密度以上升趋势为主,但网络联系还处于弱联结状态;南京的点出度最大,而苏州的点入度最大,城市空间联系不均衡性较显著,网络结构表现分层现象;城市网络空间结构存在4个城市子群,第1子群(苏锡常都市圈)及第2子群(南京都市圈)的密度系数较大,空间网络联系最为紧密;要素流动、区位差异及交通创新综合作用驱动2000年~2012年江苏省城市网络空间结构发生演化。

With the rapid development of urbanization, urban economic link be-comes closer and more complex, a large amount of material flow, technology flow and information flow promote constant evolution of urban spatial struc-ture, urban hierarchy system and the urban network system. Urban network is gradually becoming the new paradigm. This paper takes the case of 13 cities in Jiangsu province, uses a revised gravity model to measure contact intensity between cities, and uses the SNA to analyze evolution of urban spatial network structure from 2000 to 2012, and reveals evolution mechanism of urban spatial network structure. The results showed that: since 2000, density of urban net-work has kept rising, but the network connection was still in the weak cou-pling state; the out degree of Nanjing was the biggest, the in degree of Suzhou was the biggest; urban network spatial structure had four cities sub-group, density coefficient of first subgroup (Su-Xi-Chang metropolitan circle) and second subgroups (Nanjing metropolitan circle) were larger; geographical location conditions is the basic element of urban network spatial structure evolution, factors flow is the important foundation of the formation and evo-lution of the urban network structure, regional accessibility is the main fac-tor of the evolution of the urban network spatial structure, and flow ele-ments, regional differences and traffic innovation comprehensively drived the evolution of urban spatial network structure in Jiangsu province.