省际边界区城市空间扩展特征及驱动因素研究——以晋陕豫黄河金三角地区为例

Characteristics and driving factors of urban spatial expansion in inter-provincial border areas:Take the Golden Triangle of Shanxi,Shaanxi and Henan Yellow River as an example

基于多时相TM和ETM卫星遥感影像数据,以典型流域型省际边界区晋陕豫黄河金三角地区主要城市为研究对象,通过扩展速度、扩展强度、紧凑度、分形维数、扩展弹性指数来反映城市空间扩展特征,采用灰色关联模型,表征城市空间扩展的影响因素。结果表明:1990-2017年,研究区城市空间扩展速度呈现"逐步下降-快速上升"的特征,有向紧凑化方向发展的趋势,城市空间扩展以内部填充为主,城市扩展的理性程度降低;行政、市场、交通因子与研究区城市空间扩展的关联度整体较高,省际边界区城市空间扩展是在行政强驱动和市场弱驱动下,经济、交通、人口等因素在特定条件下交互作用的结果。

Based on the data of year-time TM and ETM satellite remote sensing images,this paper takes the main cities of the Golden Triangle region of the Yellow River in the typical watershed-type provincial boundary area as the study area. The expanding speed,expanding intensity,compactness,fractal dimension and expansion elasticity index are applied to reflect the urban spatial expansion characteristic. The grey relational model is used to represent the influence factors of urban spatial expansion. The results show that: from 1990 to 2017,the urban spatial expansion rate of the study area showed the trend of“gradual descent-rapid rise”,and there is a trend towards compactness. The urban space expansion was dominated by interior filling. The rationality of urban expansion is reduced;the urban spatial expansion in the study area is highly correlated with administration,market and traffic factors. The urban spatial expansion of the provincial boundary area is the result of the interaction of economy,transportation,population and other factors under the strong administration and weak market driving.