摘要
为弥补既有研究存在的数据平均化基于单一空间类型、对山水资源富集城市针对性不强等不足,以武汉为例,基于城镇居住用地、乡镇街行政辖区、规划地域层次及格网单元的多重叠加,利用GIS及SPSS识别市域及主城区人口密度分布特征。研究发现:市域乡镇街人口密度梯度差异大,"核心—边缘—外围"结构突出,"圈层层级式"格局显著;主城区人口高度密集,密度分布呈"复合多中心";"两江口"是三环内人口主中心,其4km范围内单中心结构突出,符合幂函数模型;4km外具备4个人口副中心,主副中心在西北、东北和东南形成三条人口密集轴带。分析认为:我国(特)大城市市域人口密度格局多遵循"核心—边缘"及"圈层分布"规律;主城区存在高密度主中心,人口分布普遍经历从"单核心"向"单核—多核复合化"的渐进过渡,不能单纯用"非单即多"定义主城区人口格局,城市人口密度模型因时、因地而异。
To make up the deficiencies of the existing researches such as data averaging based on a single space type and weak petinency to cities rich in landscape resources, this paper uses GIS and SPSS to recognize the population distribution features in Wuhan, based on the multi-layer superposition of urban residential land, administrative areas of township, town and street, planning regional levels and grid units. The research discovers： on one hand, there is quite a big difference in population density gradient among administrative regions of township in the city, and the ＂core-edge- periphery＂ structure and the hierarchical circular distribution layout are obvious. On the other hand, the population in main urban areas is highly densed, with the distribution of ＂composite multi-centers＂. The intersection between Yangtze River and Han River performs as the population＇ s main center, and in its 4km range the single center structure is prominent, which can be simulated accurately by power function model. There exist four population sub-centers beyond the scope of 4km, and three axis are formed by main center and sub-centers in northwest, northeast and southeast. The research shows that the spatial layout of population density in most Chinese megacities follows the rules of ＂core- periphery structure model＂ and ＂circular distribution＂. Inside the main urban area, there is always a high-density population center, and the spatial layout generally experiences a gradual transition from ＂monocentric＂ structure to ＂composite monocentric-polycentric＂ structure. The density model changes with different megacities and stages of development.
出处
《经济地理》
CSSCI
北大核心
2015年第9期33-39,共7页
Economic Geography
基金
国家自然科学基金项目(51478199)
关键词
人口密度
空间分布
圈层层级式
复合多中心
武汉
population density
spatial distribution
hierarchical circular distribution
composite multi-centers
Wuhan
