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| RESEARCH AND COUNTERMEASURES ABOUT GRADING SCALE STRUCTURE OF CHANGSHA-ZHUZHOU-XIANGTAN CITY CLUSTER BASED ON THE FRACTAL THEORY |
| TANG Fang-hua1,2, WEI Qing-quan1, CHEN Li-li3, YOU Xi-bin4 |
1. Center for Urban and Regional Studies, Sun Yat-Sen University, Guangzhou 510275, China;
2. Hunan City University, Yiyang 413100, China;
3. Hunan Normal University, Changsha 410081, China;
4. Planning Administration Institution of Machong Town, Dongguan 523142, China |
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Abstract Hierarchical structure is one of the three structures in urban agglomerations,reflecting the variation of cities in scale as well as concentration or dispersion of the urban population,and it is of help for understanding the phase of urban agglomerations．The "3+5"city cluster is regarded as the trial zone of "the two-type society" of the country, it must be made bigger and more powerful, in order to realize enriching the people,building up the province and the scientific spanning development.This paper makes a demonstration about the grading scale structure of the Changsha-Zhuzhou-Xiangtan "3+5" City Cluster (here in after referred to as "3+5" City Cluster) in Hunan province with the use of fractal theories and methods．It is found that this region exhibits a city-size distribution following the rank-size rule．Based on the fractal theory, the anthors make an analysis on the size distribution of "3+5" City Cluster．Conclusions have been drawn by caculating dimensions of urban system over the past several years in "3+5"city cluster:"3+5"city cluster's scale distribution with fractal characteristics. This distribution seriously affects the exerting of radiariy action of the primate city. It could be concluded through the models that the grading scale structure of the city cluster is concentrated just in the more mature stage,since the fractal dimensions of the population and economic distribution is more than 1. Also, this article calculated that the 2, 4, 11 urban cities' index of "3+5"city cluster, showed some characteristics of the city cluster that the first distribution is not obvious, the urban primacy index is low, the scale effect is inevident,the urban scale is small in whole,the development of metropolis and big cities is not enough,medium-sized cities are prominent and the spatial distribution of cities is not equa1.To optimize its Grading Scale Structure, the following measures can be taken combine to: strengthen the main role of radiation in Changsha as the first city; to accelerate the integration of Changsha, Zhuzhou and Xiangtan,combining the three cities as one; to enhance the development of local characteristics and personalities of key cities; to focus on the development of small and medium-sized cities to avoid the distraction of fractal dimension; to speed up the construction of small towns and optimize the layout of cities and towns and other areas of Changsha, Zhuzhou and Xiangtan City Cluster; Taking these problems into consideration, this paper puts forward some detailed measures to improve this structure and realize the scales of a sustainable,rapid and sound development．
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Received: 10 March 2008
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2008, Vol. 23 
