文琴　罗世琼　李聪洁等

摘要 城市用地规模扩大是城市化的重要标志之一。县域城市具有衔接大城市与广大农村的重要功能，研究其用地规模空间分异规律对于理解城市地理过程具有重要的意义。该研究在ArcGIS10.0平台支持下，提取湖北省2010年各县市县城面积及县域总面积数据，结合各县市的社会经济等信息，利用GIS手动分级法对全湖北省各县域城市的空间分异特征和规律进行研究。结果表明：湖北省各县域城市土地城市化空间分异和经济发展水平的空间分异相协调，即区域内土地城市化发展存在很大的不平衡性，以武汉市为中心，在长江沿岸平原区和重要铁路沿线县城面积与县域面积占比都较大，在经济边缘地带的鄂西和边远山区县城面积与县域面积占比都很小，而鄂中大部分县市占比比较大，鄂北和鄂南地区县市占比处于居中位置。

关键词 土地城市化；空间分异；地区差异；湖北省

中图分类号 S29 文献标识码 A 文章编号 0517-6611（2015）20-215-03

Abstract Urban land scale is one of the important symbol of urbanization. County city has a significant function of big cities and vast rural cohesion. Research the spatial and differential laws of the land use scale is of great importance to understanding urban geography process. With arcgis10.0 platform support， the extraction of 2010 counties of Hubei Province city area of the county and the county a total area of the data， combined with various information such as the social economy， using GIS manual classification method on the spatial differentiation characteristics and regularity of each county city in Hubei Province were studied. Research shows that： the county， Hubei Province urbanization space differentiation of urban land and the coordinated economic development level of spatial differentiation. The area of land urbanization development there is a big imbalance， taking Wuhan as the center， in the plains and important town along the railway area along the river and the county area are larger than， on the edge of the economic zone of western HUBEI and remote mountain town area and the county area proportion are small， but EZHONG accounts for most of the counties and cities than is bigger， north Ordos and area counties and cities of the center position， the research reveals the counties of Hubei Province， the spatial differentiation characteristics of urbanization.

Key words Land urbanization； Space differentiation； Regional differences；Hubei Province

隨着经济的迅速发展，城市化进程不断加快，城市用地规模的扩大是城市化的重要标志之一。县城作为衔接大城市与广大农村的过渡地带，其城市化过程呈现出显著而独特的特点。从全国来看，中部地区的城市化处于加速发展阶段，但仍低于全国平均水平。中部6省只有湖北省的城市化率超过全国平均水平，达到43.2%；湖北省建成区面积在中部6省中也是最多的。研究湖北省各县市的土地城市化空间分异特征和规律，对于促进湖北省东西平衡协调发展，推动中部地区乃至全国的县市发展的合理化进程，具有一定的示范作用；……