Research on the urban system of Three Georges Reservoir Area in northeastern Chongqing based on fractal theory

Taking the 11 counties in Three Gorge reservoir area of Northeast Chongqing as an example and using the fractal theory,this article calculated the first index of the urban system and the fractal dimension of the city size distribution to explore the scale structure of the urban system,and evaluated the correlation dimension of the space structure to understand the spatial structure of the urban system.The results show that:1)the urban system in Three Gorge reservoir area of Northeastern Chongqing has fractal structure and fractal features;2)Wanzhou,the biggest city in the system,is of no obvious monopoly features and there are a number of middle-sized cities,with population distributing evenly in these cities;3)the cities and towns scatter in this area,with an ordinary spatial correlation among them.Finally,based on the results,this paper proposesd the following measures to optimize the urban system structure and function:to strengthen the main radiation role of Wanzhou as the first city,to develop the town-zone along the river,to speed up the construction of different characterized small towns and to consummate the transportation and information network.