摘要
从"城市结节性"和"空间交通可达性"两个方面改进场强模型,采用主成分分析法与指标体系计算城市结节性指数,利用累积耗费距离测算空间可达性,借助k阶数据场模型并遵循场强取大原则,综合测度分析了1991年和2010年我国287个地级以上城市的影响腹地范围及空间演变特征。测度结果表明,1991-2010年,我国地级以上城市的平均可达性时间从1991年的246.98分钟缩短为2010年的193.43分钟,空间场能显著增长且空间分异性显著;中小城市不同程度地扩展了自身的影响腹地,而大城市的腹地则有所收缩;城市腹地的偏移度总体呈现西高东低、北高南低的态势,空间形态总体趋于规则和紧凑。
This essay improves the traditional fieldmodels from two aspects of ＂composite nodality index＂ and ＂regional accessibility＂ in order to delineate urban hinterland areamore reasonably. The principal components analysis method isused to calculate urban nodality index with the indicators sys-tem. With the application of raster cost weighted distance meth-od and k - order data fields, this essay measures the regional accessibility and the spatial field of 287 cities at prefecture level orabove in China. Furthermore, this essay delimits urban hinter-lands in 1991 and 2010 in accordance with the principle of＂maximal field- strength choice＂ by using GIS software. Theresults indicate that the accessibility condition continues to beimproved and the average accessibility is 246.98 min and 193.43 in 1991 and 2010 respectively. Spatial filed have been in-creasing significantly, and the small and medium - sized citiesexpanded its hinterland but big cities＇ hinterland areas areshrink. Drift rate of urban hinterland is more advanced in north -western region than that in southeastern region.
出处
《城市问题》
CSSCI
北大核心
2014年第6期37-45,共9页
Urban Problems
基金
国家自然科学基金项目(41061017)--中国地级以上城市腹地测度及其空间演化研究
关键词
城市腹地
城市影响范围
空间场能
可达性
中国
urban hinterland
urban spheres of influ-ence
spatial field
accessibility
China
