跨江城市群城镇化空间格局演变及机制研究——以皖江城市带为例

以皖江城市带为例,采用空间自相关模型对其新型城镇化空间相关格局进行分析并提出建议；分析跨江城市群新型城镇化发展的特有机制。结果表明：(1)从2010年以来，皖江城市带新型城镇化水平呈上升趋势但不稳定，区内差异性减弱且质量有所提高，新型城镇化水平与经济发展水平不一致；(2)从全局空间关联角度来看，皖江城市带新型城镇化水平在空间上存在明显的正相关性即存在空间集聚现象；(3)从局部自相关角度来看，H-H集聚区即热点区存在沿长江东移的趋势，H-L集聚区主要位于宣城，L-H集聚区向铜陵演变，L-L集聚区位于皖江城市带西部六安、安庆、池州，且发展稳定；(4)江河功能的嬗变、政府政策的鼎革、城市之间竞速发展与地理扩散是跨江城市群新型城镇化发展的特有机制。

Mechanism and Spatial Structure Evolution of Urbanization in River-crossing Cities : Take Wanjiang City Belt as an Example

The paper constructs valuation index system of urbanization by using AHP methods, and combine the content of the urbanization and the reality of Wanjiang City Belt, to measure and evaluate the level of urbanization in Wanjiang City Belt, also use spatial correlation model to analysis spatial pattern of urbanization and then make suggestions, analyze urbanization mechanism of River-crossing Cities. The result shows that since 2010, urbanization level in Wanjiang City Belt is rising, but the trend is unstable. The differences among Wanjiang City Belt is weakening and quality is improving, and the level of urbanization is not adapted to the level of economic.From the global spatial correlation point of view, Wanjiang City Belt’s urbanization level has a positive correlation characteristics, it meant that the regions are concentrated. From the local spatial correlation point of view, H-H correlation pattern has the trend of moving along the Changjiang River to the east, H-L correlation pattern is primarily in Xuancheng, L-H correlation pattern evolves to Tongling, L-H correlation pattern locates in Luan, Anqing, Chizhou, and the development is stable. Change of river’s function, update of government’s policy, competition of cities are special?urbanization mechanisms of river-crossing cities.