Spatio-temporal dynamics of city-size distribution in Yangtze River Delta
Received date: 2007-11-21
Revised date: 2008-03-10
Online published: 2010-11-20
Supported by
国家自然科学基金资助项目(40601074)和国家自然科学基金重点资助项目(40435013)
Urban is the engine of economic growth. With the rapid development of urbanization process across the world, the dynamics of city-size distribution has been a hot topic. The heat debates centering on the optimal city size have exerted impacts on the urbanization courses in China. From several different perspectives, this paper investigates the spatio-temporal dynamics of city-size distribution in the Yangtze River Delta during the period 1984-2002. Empirical results show that the evolution of urban system in the Yangtze River Delta has undergone primate, rank-size and primate distribution patterns. The primacy of Shanghai was the lowest in 2002, but the whole pattern of urban system in the Yangtze River Delta shifted to primate distribution pattern again, which to a large extent reflects the corresponding adjustments of urbanization guidelines in China in the 21st century. In term of the relationship between city size and city growth, the whole urban system takes the form of convergent growth, which means the initial smaller cities grow faster than larger cities. However, the difference in city growth is not significant. From the long-term tendency, the number of cities over two times of the average size will greatly decrease to about 6%, and middle-sized cities will dominate the urban systems in the future. Generally speaking, it will take about 16 years for a non-city area to develop into a city with half of the average size. On the whole, the change of city-size distribution in the Yangtze River Delta is becoming much even, but the tendency of spatial polarization and concentration is not the case. The spatial agglomeration in southern Jiangsu and Hangzhou Bay rim continues to be strengthened with the deepening of the policy opening to the outside world, which contrasts with the relative quiescence in northern Jiangsu and southern Zhejiang.
PU Ying-xia, MA Rong-hua, MA Xiao-dong, GU Chao-lin . Spatio-temporal dynamics of city-size distribution in Yangtze River Delta[J]. GEOGRAPHICAL RESEARCH, 2009 , 28(1) : 161 -172 . DOI: 10.11821/yj2009010018
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