南京都市圈空间相互作用时空演变分析

THE SPATIO-TEMPORAL EVOLVEMENT ANALYSIS OF SPATIAL INTERACTION AMONG CITIES AND COUNTIES OF NANJING METROPOLITAN AREA

利用改进引力模型并结合GIS方法,分析2000年以来南京都市圈县域尺度空间相互作用的时空演变,探讨圈域发展的问题与对策。结论如下:南京都市圈县市空间联系强度不断增强,南京主城与其它县市相互作用强度最高,其次为沿江各县市间、地级市主城区与其郊县间,南京、扬州、镇江、马鞍山等所辖县市间出现了联系强度较高的网络,有一体化发展趋势;历年县市潜力值都由最高峰的南京主城区为中心向四周递减,呈圈层式结构,在向外扩展过程中存在空间变异性,高潜力区沿江伸展,随着圈域内其它地区的发展,单一核心的结构开始发生变化;最后总结都市圈发展过程,提出圈域一体化发展的政策、交通、产业措施。

With the deepening of globalization and the strengthening of regional economic integration, metropolitan area has become an key research content of economic geography and regional economics. The metropolitan construction promotes harmonious and linkage development, which is conducive to the metropolitan integrated development. The spatial Interaction study is one of the most important parts in metropolitan area study. This paper calculates and analyzes the spatio-temporal evolvement of spatial interaction among coun- ties of Nanjing metropolitan area by using the improved gravity model, improved potential model and GIS spatial analysis method. And on this basis＇ problems and countermeasures during the metropolitan development are discussed. Some conclusions can be draw as follows： 1） Spatial relation of cities and counties is growing in Nanjing metropolitan area, the linkage between Nanjing main city and other counties and cities are the strongest. 2） The evolution of spatial relation in Nanjing metropolitan area reflects the space recon- struction of metropolitan＇s internal space form which is radial structure taking Nanjing as the center in 2000 and there is a high strength contact network among cities and counties in Nanjing, Zhenjiang, Yangzhou, Maanshan in 2013.3） The potential value of the Nanjing＇s main city is in the first place during the study period. 4） There is a layer structure of potential values taking Nanjing as the center.