河西走廊绿洲型城镇空间相互作用时空演变

The Spatio-Temporal Evolvement of Spatial Interaction among Oasis Urban of Hexi Corridor

运用因子分析、改进的引力模型、改进的潜力模型和空间点的吸引范围模型,基于六个时间断面的数据,分别从空间相互作用强度、城镇潜力值和城镇空间吸引范围的时空变化方面探讨了1990—2012年河西走廊县域城镇空间相互作用时空格局演变特征。结果表明:(1)城镇空间相互作用强度总体加强,空间相互作用强度大小主要受城镇综合实力、城镇行政地位和城镇地理位置的影响。嘉峪关市和肃州区表现出明显的同城效应和强烈的一体化趋势,金川区和凉州区受空间邻近效应影响明显。(2)河西走廊城镇潜力分布区域不均衡,空间分异和空间辐射的特征及演变规律显著,嘉峪关市和肃州区潜力值大且增长迅速,空间集聚能力强。(3)城镇空间吸引范围的变化,各层次的城镇存在差异。城镇综合实力、地理位置及行政区域的面积是影响城镇空间吸引范围大小的三个主要因素。

Based on the data of the six time section, with the help of factor analysis, the improved gravity model, improved the potential model and spatial attracting scope of model, this paper discusses the space-time evolution characteristics of county urban space interaction in Hexi Corridor during 1990-2012. Results indicate that： 1）Strength of urban space interaction overall strengthening, spatial interaction strength mainly influenced by urban comprehensive strength, urban administrative position and geographic location. Jiayuguan and Suzhou area show the obvious effect of the same city and the strong integration trend. Jinchuan area and Liangzhou area affected by the spatial proximity effect is obvious. 2）Urban potential distribution area is imbalance, characteristics of the spatial difference and space radiation is obvious, the same as evolvement. Potential value is large and growing rapidly, there is good ability of spatial agglomeration in Jiayuguan and Suzhou area. 3）Different level urban spatial attracting scope change is different. Urban comprehensive strength, geographical location and administrative area are the main factors which influence urban spatial attracting scope.