Analysis on the Regional Space Reconstruction Based on the Central City:A Case Study of Jiangsu Province

Due to the unbalanced development in Jiangsu Province,the spatial structure had long been described dividedly as Sunan(the South part of Jiangsu),Suzhong and Subei.This paper explored the spatial reconstruction in the level of central city,tried to break the traditional partition method(southern,central and northern Jiangsu) and put forward a scientific and reasonable spatial structure.In order to find the really spatial pattern of Jiangsu Province at present,and give rational advices on making spatial development policies,in this research,18 indicators containing GDP,fixed assets investment volume,total retail sales of consumer goods and the per capita added value of service industry from six aspects(including economy,trade,service,transportation,information,science and opening outside) are selected to build up the evaluation index system of urban centricity,which aims at calculating and analyzing the urban centricity indexes of 13 cities in Jiangsu Province with entropy method.Then with the help of economic relation intensity and city accessibility,the paper made a comprehensive comparison in 13 cities in Jiangsu Province.The results showed that: 1)The urban centricity indexes of 13 cities in Jiangsu Province were predominated by aspects of economy,service,transportation and information.On the whole level of Jiangsu Province,the urban centricity of Sunan was better than Suzhong,Suzhong better than Subei.2)The city with high accessibility was located in region of gravity center,and the special distribution pattern of the accessibility of rest cities appeared a degressive trend from the gravity center to the Northern and Southern Jiangsu respectively.3)13 cities of Jiangsu Province can be regrouped into four major sub-regions.They were Su-Xi-Chang-Tong area which is composed of Suzhou,Wuxi,Changzhou and Nantong,Ning-Zhen-Yang-Tai area which is composed of Nanjing,Zhenjiang,Yangzhou,and Taizhou,Xu-Su-Lian area and Yan-Huai area.Among them,Suzhou,Nanjing,Xuzhou and Yancheng are the regional central cities.However,the rationality of evaluation index system,scientific nature of reconstruction and its consequences need further research and exploration.