陇海—兰新—北疆铁路沿线城市紧凑度及其影响因素研究

根据紧凑城市的核心内涵,从空间紧凑、结构良好、效率较高三个维度构建了城市紧凑度测度指标体系,运用主成分分析计算了2009年陇海—兰新—北疆铁路沿线40个城市紧凑度的综合得分,并将其划分为紧凑、较紧凑、一般紧凑和不紧凑四种类型。除个别城市外,从总体上来看,沿线城市紧凑度水平按照特大城市、大城市、中等城市、小城市的顺序呈现依次降低的变化规律。通过多元线性逐步回归分析了城市紧凑度的主要影响因素,结果表明目前影响沿线城市紧凑度的主要因素首先是经济增长弹性,其次是人口密度、基础设施建设和城市形态紧凑度等;对于不同规模的城市,城市紧凑度的主要影响因素亦有差异。

Comprehensive Evaluation of Urban Compactness and Its Influencing Factors：Case of the Cities along Longhai-Lanxin-Beijiang Railway

According to the basic concept of compact city,this paper has built a comprehensive evaluation index system for urban compactness from three aspects which includes compactness of urban space,reasonable structure and high efficiency.Based on the principal component analysis and calculation of urban compactness comprehensive scores of the 40 cities along Longhai-Lanxin-Beijiang railway in 2009 deviding into four classes such as compact,relatively compact,less compact and non-compact.Overall,the level of urban compactness successively degrades in that order of supercities,big cities,medium-sized cities and small cities.The paper also analyzed the main influence factors on urban compactness by multiple linear regression model and drew that the chief influence factor on urban compactness is economic growth elasticity,population density,the construction of urban infrastructure facilities,compactness of cities morphology and so on.In addition,the main influence factors on urban compactness of different scale cities are different.