基于WorldPop数据的成渝城市群多中心结构研究

Research on the Polycentric Structure of Chengdu-Chongqing Urban Agglomeration Based on WorldPop Data

利用WorldPop人口格网数据,通过局部空间自相关分析和社会网络法,识别成渝城市群的中心分布特征和多中心分布结构.结果表明:①人口主中心形成了以重庆和成都为核心、绵阳—成都—乐山为西部发展带、南充—重庆—泸州为东部发展带、宜宾和自贡为发展动力点的“两核两带两点”的分布格局.②成渝城市群内城市多中心结构模式还不凸显,具备多中心结构的只有7个城市,分别是成都、德阳、绵阳、南充、广安、重庆、乐山,呈现“西多东少、北密南疏”的特点.③建议形成“两核一带三廊道”的区域发展格局,以带动成渝城市群全区域联动发展.

Using WorldPop population grid data,the center distribution characteristics and polycentric distribution structure of Chengdu-Chongqing urban agglomeration were identified through local spatial autocorrelation analysis and social network method.The results show that:①The population main center has formed a distribution pattern of“two cores,two belts and two points”with Chongqing and Chengdu as the cores,Mianyang-Chengdu-Leshan as the western development belt,Nanchong-Chongqing-Luzhou as the eastern development belt,Yibin and Zigong as the development driving points.②The polycentric structure model of cities within the Chengdu-Chongqing urban agglomeration is not yet prominent.There are only 7 cities with the polycentric structure,namely Chengdu,Deyang,Mianyang,Nanchong,Guang’an,Chongqing and Leshan,showing the characteristics of“more in the west and less in the east,and more in the north and less in the south”.③It is suggested to form a regional development pattern of“two cores,one belt and three corridors”to drive the linkage development of the entire region of the Chengdu-Chongqing urban agglomeration.