Study on spatial combination characteristics and conformity patterns of the Central Plain city cluster
中原城市群的空间组合特征与整合模式

Now,city cluster has become the principal part of urbanization form of China.The spatial conformity of city cluster is a great strategic matter which must be solved in the urbanization process.At present,the Central Plain city cluster has been developing well,and it has been deemed to be one of the ten great city clusters that China would form.Using geographical theories such as fractal theory about urban special distribution,urbanization imbalance indicator,urban network theory and analysis of urban reciprocity in space and so on,this paper analyzed the spatial combination characters of cities and towns of the Central Plain city cluster.The results show that:(1) the distribution of cities and towns is comparatively dense;(2) the urban spatial distribution takes on a convergence type;(3) the traffic-oriented and sphere layers characteristics of spatial distribution of cities and towns are obvious;(4) the primary urban network structure which has four arteries as the trunks has formed;and(5) the analysis from the angle of urban reciprocity in space,shows that it belongs to the typical "weaker pole and multiple cores pattern".Then,this paper analyzed the ordinary principle about spatial conformity of city cluster,and according to this law,it conceived the spatial conformity mechanism to make the nine cities of the Central Plain city cluster develop harmoniously as a whole.According to the development feature of the Central Plain city cluster itself,this paper considered that in this period,the Central Plain city cluster as a whole should take "sphere layer" pattern of urban spatial conformity;in the local parts,according to the status,it could adopt "axial belt" and "growth triangle" patterns;and in the future when the Central Plain city cluster has been developing maturely,using "double city" pattern would be reasonable.Colligating the above analysis,this paper considered that around 2020,the Central Plain city cluster should strive for spatial conformity as "double core,double circle layers,four axial belts,one growth triangle " as a whole,so that the Central Plain city cluster form the pattern of center centralizing,axial stretching and network contacting.