成渝城市群中心城市空间扩展特征及驱动机制  

Characteristics and Mechanism of Central City Spatial Expansion Pattern of Chengdu-Chongqing Urban Agglomeration

作　　者：刘小波[1,2] 王海力 刘颖[3] 李益彬 LIU Xiaobo;WANG Haili;LIU Ying;LI Yibin(College of Geography and Resources Science,Neijiang Normal University,Neijiang Sichuan 641100;Research Center of Mountain Development,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,hengdu Sichuan 610041;China West Normal University,School of Geographical Science,Nanchong Sichuan 637002 China)

机构地区：[1]内江师范学院地理与资源科学学院,四川内江641100 [2]中国科学院、水利部成都山地灾害与环境研究所山区发展研究中心,成都610041 [3]西华师范大学地理科学学院,四川南充637002

出　　处：《重庆师范大学学报（自然科学版）》2024年第3期121-132,共12页Journal of Chongqing Normal University:Natural Science

基　　金：国家社会科学基金项目(No.20XZS020);四川省社会科学重点研究基地沱江流域高质量发展研究中心课题(No.TJGZL2022-18,No.TJGZL2022-26);四川省社会科学重点研究基地四川县域经济发展研究中心课题(No.xy2022023);内江师范学院校级科研项目(No.2021QN02)。

摘　　要：为探究成渝城市群中心城市空间演变时空过程、揭示其中驱动机制并基于成渝地区双城经济圈建设背景模拟未来城市空间扩展方向,采用城市空间特征测度方法、地理探测器、FLUS模型等方法进行了深入分析,研究结果如下:1) 1980-2020年成渝城市群中心城市空间扩展迅速,城市规模大幅增加,扩展强度均呈现上升趋势。中心城市的紧凑度指数一直呈下降趋势,而分形维数则几乎同步呈现先上升后下降的趋势,城市空间形态不规则化、离散化趋势明显。成都市城市空间扩展形成以同心圆圈层扩展为主的“圈层式、放射状”模式;重庆市城市空间扩展则形成“多中心、多组团”模式。2) GDP、人口、交通和开发区是成渝城市群中心城市空间扩展的主要驱动因素。经济的快速发展吸引人口大量集聚,成为城市空间扩展的根本动力,推动城市空间快速扩张;城市内外不断形成的高速公路网络格局与规划新建的开发区,则对城市空间扩展方向形成明显的牵引作用,是城市空间扩展过程中最直接的推动因素。3)模拟结果显示未来成渝城市群中心城市仍将依托原有城市空间向外围扩展,同时政策规划要素对城市空间扩展的牵引作用进一步凸显,城市空间将逆向突破地形限制,相向扩展,形成新的城市空间格局。上述研究结果提示:成渝城市群中心城市空间扩展过程存在差异,主要驱动因素从自然因素主导向经济因素和社会因素主导转变,中心城市间相向吸引的互动作用逐渐凸显。建议未来充分发挥成渝地区双城经济圈战略的动能作用,优化城市空间结构,带动成渝地区中部中小城市发展,优化和完善成渝地区城市体系。In order to explore the spatiotemporal evolution of the central cities in the Chengdu-Chongqing Urban Agglomeration(CCUA),reveal the driving mechanisms,and simulate the future direction of urban spatial expansion based on the construction background of Chengdu-Chongqing Economic Circle(CCEC),an in-depth analysis is conducted by using methods such as urban spatial characteristics measurement,geographical detectors,and the FLUS model.The results are as follows:1)From 1980 to 2020,the central cities in the CCUA experienced rapid spatial expansion,with a significant increase in urban scale and a rising trend in expansion intensity.The compactness index of central cities showed a downward trend,while the fractal dimension showed a trend of first increasing and then decreasing,with obvious irregularization and discretization of urban spatial forms.The urban spatial expansion of Chengdu formed a“concentric circle layer expansion"mode,mainly“circle layer and radiated";while the urban spatial expansion of Chongqing formed a"multi-center,multi-group"mode.2)GDP,population,transportation,and development zones are the main driving factors for the spatial expansion of central cities in the CCUA.The rapid economic development attracts a large population to gather,becoming the fundamental driving force for urban spatial expansion,promoting the rapid expansion of urban space.The continuously forming highway network pattern within and outside the city and the planned and newly built development zones have a significant traction effect on the direction of urban spatial expansion,and are the most direct driving factors in the process of urban spatial expansion.3)The simulation results show that the central cities of the CCUA will continue to expand outward based on the original urban space in the future,while the traction effect of policy planning elements on urban spatial expansion will become more prominent.The urban space will break through terrain constraints in reverse and expand towards each other,forming a new urban spati

关 键 词：空间扩展 驱动机制 地理探测器 FLUS模型 成渝城市群 

分 类 号：X22[环境科学与工程—环境科学] F299.21[经济管理—国民经济]