陕北城镇体系结构分形特征研究

Study of Fractal Structure Characteristics of Urban System in Northern Shanxi

以2012年陕北非农业人口和陕西省交通地图为主要数据,借助分形理论对陕北城镇体系等级规模、空间结构和空间集聚特征进行量化研究。结果表明:延安和榆林城镇等级规模较为集中,分布较为均衡,中间位序城镇较多;陕北城镇之间交通通达性较好,各城镇之间具备开展经济协作的基础设施条件,两市的城镇体系在空间上分布比较集中,城镇主要分布于沟谷河流沿线,形成城镇体系的主要发展轴线;陕北城镇体系的空间分布从中心向四周密度递减,城镇体系呈现集聚分布状态。

Based on the fractal theory, a quantitative research of the hierarchical structure of urban system, spatial structure and spatial agglomeration characteristics in Northern Shaanxi is made. Working on a major database of Northern Shaanxi non-agricultural population over 2012, traffic map of Shaanxi Province . The results indicate that Yanan and Yulin urban system scale is more concentrated and distribution is more balanced which contain more middle town. The Transport accessibility is better. Towns can develop economic cooperation by using infrastruc- ture. The spatial distribution features of urban system in two cityes is relatively concentrated. Towns is mainly in the valley along the river which is the main development axes of the urban system. The spatial distribution of urban system in Northern Shaanxi is decreasing from the center to the periphery. The town system presents a cluster distribution.