A Fractal Study and Optimization on Spatial Distribution of Urban System in Huaihai Economic Zone

Firstly,the paper summarizes the present situation of urban system in Huaihai Economic Zone,and some conclusions are drawn:Urban system is relatively perfect,but the urban primacy index is too small,scale distribution is lopsided;urban density is comparatively big,spatial distribution is fairly balanced;characteristics along axis direction of urban distribution are obvious.Then urban scale structure and spatial distribution are studied by using Zipf rule and correlation dimension.Some proposals are put forward for the optimization of urban system,such as strengthening leading status of Xuzhou as primary central city;emphatically developing regional central cities;actively developing small cities and quickening the construction of regional spatial structure axis;establishing and perfecting the unified and coordinated mechanism.