西宁市城市空间格局时空动态研究

Spatial-temporal dynamics of urban spatial pattern in Xining

为了调查城区扩张特征及城区扩展驱动力对城市扩张的影响,文中利用遥感影像,结合GIS技术对西宁市2000—2016年城市格局进行时空动态监测,从城区面积、扩展面积、扩展速率、扩展强度、城区各向扩展、城区扩展用地等对城区扩展状况进行统计,进而分析城区扩张特征及扩展驱动力对城市扩张的影响。结果表明:西宁市"十"字型空间结构更多体现在城区扩展模式,政府行政政策导向则体现在城区扩展规模。因此,西宁市自然地理位置及政策行政导向对西宁市城区扩展的作用显著。

In order to investigate the impact of urban expansion characteristics and urban expansion drivers on urban expansion,the remote sensing images and GIS technology have been used to monitor the spatial-temporal dynamics of the urban structure of Xining city from 2000 to 2016. The urban expansion status was analyzed from the urban area,expansion area,expansion rate,expansion intensity,directions expansion,and type of land-use. The impact of expansion characteristics and driving force on urban expansion was analyzed. The "Cross"-shaped spatial structure of Xining city was more reflected in the urban expansion mode. The government administrative policy orientation was reflected in the urban expansion scale. The natural geographical location and the administrative orientation of policies have a significant effect on the expansion of Xining city.