城市空间集聚与扩散测度及分析--以西安市为例

Measurement and Analysis of Urban Spatial Agglomeration and Diffusion:A Case Study of Xi'an

城市是人口、经济要素在空间聚集的产物,研究城市空间集聚与扩散为经济产业合理布局与科学规划提供了参考。以西安为例,采用碎化指数、均匀度指数、人口集聚-扩散指数对城市空间集聚与扩散状态进行了测度与分析。结果表明,2000-2015年间西安市总体呈现出先集聚后扩散的发展趋势,城市周边区县承接产业与人口转移,出现明显的扩散趋势,经济与人口要素空间分布则更趋均匀。

City is the product of the spatial accumulation of population,economy and other factors.The study of urban spatial agglomeration and diffusion provides references for rational economic industrial layout and scientific planning.Taking Xi'an as a case study,this paper uses fragmentation index,uniformity index,and population agglomeration-diffusion index to measure the urban spatial agglomeration and diffusion state.The results have shown that Xi'an City generally presents a development trend of first agglomeration and then diffusion from 2000 to 2015.The surrounding districts and counties of the city undertake the transfer of industries and population,and there is an obvious trend of diffusion,and the spatial distribution of economic and population factors is more uniform.