武威城区公共服务设施空间可达性研究

A study on spatial accessibility of public service facilities in Wuwei city

本文以交通网络中心性为视角,运用多中心性评价模型研究武威城区公共服务设施空间可达性。研究结果显示,交通网络中心性呈“一主一副”双中心分布模式,由老城区南片区和武南镇东片区向外围逐渐降低;公共服务设施分布趋势由老城区向新城区和武南镇区延伸,集聚态势显著,区域差异较明显;公共服务设施中心性指标与距离呈负相关,但距离市中心较远的武南镇东片区出现较高峰值;公共服务设施空间可达性在空间上呈明显的单中心结构特征,由中心向外围逐渐降低,从整体来看空间可达性较差。

Spatial accessibility is an important index to evaluate the layout and fairness of urban public service facilities,which has an important significance on city planning.This paper studies the spatial accessibility of public service facilities in Wuwei city from the perspective of street network centrality by using the Multiple Centrality Assessment Model(MCA).The results show that the street network centrality presents a double-center distribution pattern of"one master and one deputy",which gradually decreases from the south area of the old city and the east area of Wunan town to the periphery.The distribution trend of public service facilities extends from the old city to the new city and Wunan town.The trend of agglomeration is significant,but the regional differences are obvious at the same time.The centrality index of public service facilities is negatively correlated with"distance",but there is a high peak in the east area of Wunan town.The spatial accessibility of public service facilities is characterized by singlecenter structure,which decreases gradually from the center to the periphery.