云南省县域城镇化与交通优势度的时空协同性演化分析

运用ArcGIS空间分析、交通优势度模型和耦合协调度模型等方法,对云南省县域城镇化与交通优势度的时空协同性演化特征进行系统分析。研究表明：① 城镇化与交通基础设施相互促进又相互制约,存在正负双向反馈;基础设施建设滞后、城乡二元结构格局、城市空间无序蔓延是导致两者耦合协调空间差异的主要因素。② 2000~2014年云南省整体县域城镇化水平普遍较低,约90%的县域处于城镇化起步阶段。③ 云南省县域交通优势度整体水平逐年提升,但空间分异特征显著。④ 2000~2014年期间云南省县域城镇化与交通优势度的耦合协调水平虽大幅提升,但整体协调度仍然偏低、空间分异特征依然突出。

Spatio-temporal Cooperative Evolution Analysis of Transportation Superiority and County Urbanization in Yunnan Province

Urbanization is closely related to transportation infrastructure development. On the basis of depth analysis of the internal transmission mechanism, using the data of social economy and actual road network in Yunnan Province from 2000 to 2014, by means of ArcGIS spatial analysis, transportation superiority model and coupling coordination model, the coupling coordination degree between county urbanization and transportation superiority in Yunnan Province was measured from time and space dimensions, and the changing situation and the characteristics of spatio-temporal cooperative evolution were analyzed. The results show that: 1) There are both positive and negative feedback relationship between urbanization and transportation infrastructure, both of them promote each other, but also restrict each other; The lag of infrastructure construction, the dualistic structure system of urban and rural areas and the sprawl of urban space are the main factors that lead to the spatial difference of coupling and coordination. 2) The overall level of urbanization in Yunnan Province is generally low from 2000 to 2014, although the region has been improved to varying degrees, about 90% counties are in the initial stage of urbanization. County urbanization pattern is basically stable, and the high value of urbanization is still dotted in some counties in Kunming, Dali, Xishuangbanna, Dehong, Red River and other cities, and the rest of the counties are at a lower level of urbanization. 3) The overall level of transportation superiority in Yunnan Province is increasing year by year, and the spatial heterogeneity is significant. From the “Yunling mountains-Yuanjiang Valley” as the boundary, transportation superiority of Eastern Yunnan Plateau is significantly higher than that of the Hengduan Mountains in western area, and the most obvious characteristic of gradient is in the Yuanjiang valley; The transportation superiority in Central Yunnan Province is generally higher than that in the periphery region, and both the high and the low value areas show strong spatial agglomeration. 4) During the study period, although the level of coupling coordination between county urbanization and transportation superiority in Yunnan Province has been greatly improved, the overall coordination degree is low, and the spatial differentiation phenomenon is still prominent. The coordination degree of the middle and eastern counties in Yunnan is higher than that in the northwest plateau, and the spatial coupling coordination degree shows a decreasing gradient trend from east to west; Among them, The high values of the coupling coordination degree are mainly distributed in the central Yunnan Urban Agglomeration and the sporadic counties (cities and districts) in the northeast of Yunnan Province, and the coupling coordination degree of the low value areas are concentrated in the northwest of Yunnan plateau mountain and Diqing Tibetan etc; The spatial distribution characteristics of the middle and high value counties (cities, districts) in the coupling coordination degree are basically identical with the layout of the highway skeleton network in Yunnan Province.