摘要
用城市流来描述城市的基本活动部分,用城市流强度来表征城市对外服务能力的强弱。城市流强度与中心城市的中心性强度具有强相关性。通过对全国地级以上286个中心城市的城市流强度的计算和结构分析,发现我国中心城市对外服务能力的空间格局具有如下特征:城市对外服务能力高度集中在人口密集的大城市特别是特大城市,100万人以上人口规模城市第三产业的对外服务占主导,而50～100万人的城市制造业的对外服务表现突出;东部三大城市群集中了我国城市流强度将近一半的份额,上海、北京-天津和广州-深圳组成了全国性的三大对外服务中心;东部地区的对外服务总量远高于中部、西部和东北地区,全国中心城市对外服务水平存在较大的区域落差。
In this paper, we use the concept of urban flow to describe the basic economic activity in a city, and use the concept of urban flow intensity to represent the quantitative index of external service capability of a city. We find that there is strong positive correlation between urban flow intensity and centrality index of Chinese central cities and the urban flow intensity can be used to describe the quantity of external service capability of a city effectively. By calculating the urban flow intensities of 286 central cities in Chinese urban system and analyzing their structures, we investigate the spatial distribution of external service capabilities of Chinese central cities and summarize its characteristics. The main findings are as follows： more than 85% of the total external service capability of Chinese central cities centers on the bigger cities with a population of more than 500,000 and more than 65% centers on the mega-cities with a population of more than 1 million; the cities with a population of more than 1 million take the tertiary industry as their main external service sectors, whereas the cities with a population ranging from 500,000 to 1 million have outstanding performance in manufacturing industry; the three great urban agglomerations in the eastern region concentrate on nearly half of the total national urban flow intensity. Shanghai, Beijing-Tianjin and Guangzhou-Shenzhen are the three major external service centers in national scale; the total external service capability of central cities in the eastern region is much higher than the central, western and northeastern regions, so the distribution of external service levels of central cities is greatly uneven among different regions of China.
出处
《地理研究》
CSCD
北大核心
2009年第4期957-967,共11页
Geographical Research
基金
国家自然科学基金项目(40671049)
教育部人文社科重点研究基地重大项目(04JJDZH016)
关键词
城市流强度
对外服务能力
中心城市
城市体系
urban flow intensity
external service capability central city
Chinese urban system
