基于圈层建设用地密度分析的中国主要城市扩张的时空特征

发布时间：2017-12-26 18:12

本文关键词：基于圈层建设用地密度分析的中国主要城市扩张的时空特征　出处：《长江流域资源与环境》2015年10期 　论文类型：期刊论文

【摘要】：基于圈层建设用地密度分析,提出了城市扩张核心度指数;通过计算城市扩张核心度指数和城市扩张强度指数,分析了1990~2010年中国27个主要城市距城市中心不同距离区域的城市扩张的时空模式。研究发现:(1)1990~2010年,大部分城市核心度指数不断降低,城市空间结构变化与国家区域政策密不可分,呈现明显的区域特征。1990~2000年东部沿海地区城市核心度值减少幅度较大,2000~2010年则是东北部和中西部城市降低明显。总体上看,西部和东北部城市的核心度指数要高于东部和中部的城市,结构更加紧凑。(2)城市扩张最活跃的地方总是出现在核心区边界附近,并不断向外推移。(3)城市的形态与城市的发展阶段密切相关。1990~2000年,一线城市扩张的强度和范围远大于其他城市;2000~2010年,二三线城市的扩张强度和范围明显增加。经济比较发达的城市,建设用地的扩张逐渐由单中心扩展向多中心协同发展转变,而经济相对落后西部城市和东北部城市,城市结构比较紧凑,保持着单中心的城市形态。
[Abstract]:Analysis of land use density circle construction based on the proposed expansion of the city, the core index; through the calculation of expansion of the city core index and city expansion intensity index, analyzed the spatiotemporal patterns of 1990~2010 China 27 main city from the city center area of the city expansion in different distance. The findings are as follows: (1) most of the urban core indices decrease in 1990~2010, and the change of urban spatial structure is closely related to the national regional policies, showing obvious regional characteristics. In the eastern coastal areas, the urban core values decreased greatly in 1990~2000, while in 2000~2010, the cities in the northeast and the central and western regions decreased significantly. In general, the core index of the western and northeastern cities is higher than that of the eastern and central cities, and the structure is more compact. (2) the most active areas of urban expansion always appear near the boundaries of the core area and continue to move out. (3) the form of the city is closely related to the development stage of the city. In 1990~2000, the intensity and scope of the expansion of the first tier cities were far greater than those of other cities; in 2000~2010, the expansion and scope of the two or three line cities increased significantly. In the economically developed cities, the expansion of construction land is gradually changing from single center expansion to multi center collaborative development, while the economy is relatively backward. The western and northeastern cities have compact urban structure and maintain a single center urban form.
【作者单位】：武汉大学资源与环境科学学院;武汉大学地理信息系统教育部重点实验室;
【基金】：国家自然科学基金资助项目(41171312)
【分类号】：F299.23
【正文快照】： 城市建设用地扩展是城市化在空间上最为明显的特征,也是衡量城市化进程的重要指标。改革开放30多年来,中国城市规模和数量迅速增加,建城区的扩展成为中国城市尤其是大城市现在乃至将来土地利用变化的主要特征[1]。2011年,我国城镇化水平已经超过50%[2],正处于城市快速发展时期

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