合肥市城市空间影响范围界定

THE DEFINITION WITH INFLUENCE OF URBAN SPATIAL RANGE IN HEFEI

城市断裂点理论被广泛用来界定城市的空间影响范围和城市经济区以及城市腹地范围的划分.通过构建合肥市与周边省会城市的城市综合规模指标体系和城市交通距离指标,采用城市断裂点理论和基于断裂点理论的加权Voronoi图理论模型,分析了2003-2011年合肥市与周边省会城市的城市总体规模及断裂点位置,对合肥市城市空间影响范围界定.结果表明：一是2003-2011年合肥市及周边省会城市的城市综合规模都是处于一个不断增加的状态,其中合肥市综合规模由2003年的212.17增加到201 1年的l 308.94,增长了六倍之多.各个城市的综合实力也在不断的增强.二是总体上看,断裂点位置在合肥市与周边省会城市之间并且逐渐向周边省会城市靠近,而且断裂点在合肥与南京、杭州、郑州及济南方向明显向周围省会城市移动.说明合肥市空间影响范围在持续扩大,这一点在加权Voronoi图可以明显看出.三是合肥市的空间影响范围主要界定在安徽省内区域,其空间影响范围边界线与行政区划界线差异明显.说明合肥市的城市空间影响范围并不仅局限于行政区范围之中.四是合肥市空间影响范围呈现出“南快北缓”“南窄北宽”的局面,说明与周边省会城市之间的城市综合规模比较,合肥市在东西方向上城市空间影响范围较弱,在南北方向上较强.

The breaking point theory of city is widely used in delimiting urban abstracted regions and dividing up urban economic regions, as well as the hinterland of city with definition. By building the indicator system of the comprehensive scale of urban with hefei and capital city which are located in surrounding Hefei, we use the breaking point theory of city based on the weighted voronoi diagram. At the same time, the research analyzes the location of breaking point and the comprehensive scale of urban with Hefei and another capital city surrounded with Hefei from 2003 to 2011, defines the urban abstracted regions with Hefei, and finally comes to relevant conclusions. The results are as follows. Fristly, it is in a growing state for the capital city of Hefei and another city surrounded in Hefei from 2003 to 2011, and the comprehensive scale of Hefei city is form 212. 17 in 2003 to 1 308. 94 in 2011 ,growing by as much as six times times. Each city＇ s comprehensive strength has been enhanced. Secondly, on the whole, the location of breaking point is between Hefei and capital city of a province, as well as gradually moves closer to capital cities around, but the most important things are that the breaking point in Hefei and Nanjing, Hangzhou, Zhengzhou and Jinan obviously moves io capital cities around. So description of Hefei city in space influence continus to expand. The following of weighted Voronoi diagram is clear. Thirdly, the spatial impact Hefei region mainly locates within the China＇s Anhui Province. Differences are significant with its impact area and division of the border space boundariesl The spatial impact region of Hefei city is not limited to administrative area. Finally, Hefei city space scope presents ＂slowly South -North＂ and ＂South narrow North width＂. Compared with integrated scale between capital cities around, Hefei city up the East- West space is less affected, strong in North -South direction.