基于辐射扩散测度的中国城市群发育格局识别

发布时间：2018-01-21 19:49

本文关键词： 城市群范围识别辐射场强结节性指数发育格局中国　出处：《经济地理》2016年11期 　论文类型：期刊论文

【摘要】：基于空间相互作用理论,采用合适的场强模型对中心城市辐射作用强度的高值区域识别,是界定城市群空间范围和全国城市群发育格局的重要方法。首先,以区县单元2010年的GDP和人口的几何平均值作为核心城市的结节性指数,采用辐射场能模型计算657个中心城市的辐射场强,得到全国公里栅格单元的辐射场强累加值;然后,用剖面曲率公式计算地理表面场强曲率,识别曲率高值区域即是辐射场强变化的"拐点"区域,研究确定识别城市群的空间曲率的两个关键阈值分别为60和80;最后将这些"拐点"区域所围成的场强高值区域提取出来即是城市群的空间范围。最终识别出:全国2010年共发育有18个城市群,其中都市连绵区、准都市连绵区和联合都市区的个数分别是3个、6个和9个。
[Abstract]:Based on the spatial interaction theory, it is an important method to define the spatial range of urban agglomeration and the development pattern of national urban agglomeration by using appropriate field strength model to identify the high value region of radiation intensity of central city. Based on the GDP of the district and county unit in 2010 and the geometric average of the population as the nodal index of the core city, the radiation field intensity of 657 central cities was calculated by using the radiation field energy model. The accumulative value of radiation field strength of the national km grid unit is obtained. Then, the field intensity curvature of the geographical surface is calculated by using the profile curvature formula, and the region of high curvature is identified as the "inflection point" of the change of the radiation field intensity. The two key thresholds to identify the spatial curvature of urban agglomeration are 60 and 80 respectively. Finally, the "inflection point" area is extracted from the high-value area of field strength, which is the spatial range of urban agglomeration. Finally, it is recognized that there are 18 urban agglomerations developed in 2010, among which the urban continuous region. The number of quasi-urban contiguous areas and associated metropolitan areas are 3, 6 and 9 respectively.
【作者单位】：中国科学院区域可持续发展分析与模拟重点实验室;中国科学院地理科学与资源研究所;中国科学院大学;
【基金】：“十二五”国家科技支撑计划项目(2012BAJ15B01)
【分类号】：F299.2
【正文快照】： 城市群的出现是城市区域化的重要表现形式,它既是工业化和城镇化发展到高级阶段的产物,同时也是人类社会进步的重要标志。目前,不论是学术理论界还是规划实践界,对城市群空间发育范围的界定尚未形成统一意见。陈守强等人在梳理国内外学者对城市群发育范围划分和界定的研究历程

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