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基于兰州—西宁城镇密集区2000-2008年的县域经济发展数据,以县域为研究单元,采用因子分析和GIS技术相结合的方法,对密集区经济差异的空间格局进行综合分析。结果表明:兰州—西宁城镇密集区发展较好的县域集中于湟水谷地、兰—青铁路沿线一带;密集区经济空间格局呈核心—外围空间结构,遵循空间距离衰减规律,且具有东西分异、南北分异和低值集聚、高值分散特征;2000—2008年,兰州—西宁城镇密集区县域经济差异有所减小,其中兰州市区、红古区、白银区和西宁市区保持区域经济核心地位不变,中等水平县域由数量少、斑块状的分散布局转变为范围广、集聚性强的面状空间形态,低增长型县域呈组团式集聚分布于密集区南部。
Based on the county economic development data of Lanzhou-Xining urban agglomeration from 2000 to 2008, taking the county as the research unit and the combination of factor analysis and GIS technology, the spatial pattern of the economic difference in the dense area was comprehensively analyzed. The results show that the well-developed counties in Lanzhou-Xining urban agglomeration are concentrated in the Huangshui Valley and the Lan-Qing railway; the economic spatial pattern in the densely populated area is the core-periphery spatial structure, which follows the decay law of spatial distance, , North-South differentiation, low-value accumulation and high-value dispersion. Between 2000 and 2008, the economic differences of counties in Lanzhou-Xining urban areas were reduced. Lanzhou urban area, Honggou area, Baiyin area and Xining urban area remained The economic core status remains unchanged. The middle-level counties are transformed from a small number of plains and patchy layouts into a wide range of surface space with strong agglomeration. Low-growth counties are clustered and clustered in the southern part of dense areas.