哈长—辽中南城市群扩张时空特征及驱动因素

为了探究东北地区城市扩张无序与经济发展缓慢的症结，基于DMSP， VIIRS夜间影像与城市统计数据，以哈长-辽中南城市群172个区县构建了城市扩张热点等指数，定量揭示了城市群时空扩张路径及驱动因素.结果表明:城市群扩张在2005—2009年期间达到了高峰，之后扩张速率持续下降，中心城市资源集中，次中心城市发展乏力;城市群扩张整体表现为环哈长-大庆及辽中南经济带为中心的向心集聚特征，其西部比东部扩张快，南部比北部扩张快;城市群扩张的驱动因子整体上以第一、二产业，人口及GDP为主.从时空趋势看，产业结构调整、人口流失及经济增长疲软等是城市扩张变化的主要影响因素.研究结果可为哈长-辽中南城市群未来发展的规划提供参考.

Spatial-Temporal Characteristics and Driving Factors for Urban Agglomeration in Harbin-Changchun and Central-Southern Liaoning Province

Aiming to investigate the crucial reason of urban sprawl disorder and slow economic development in Northeast China thoroughly， as well as quantitatively reveal the path of spatial-temporal expansion and the driving factors of urban agglomeration， such model indexes as urban expansion hotspots and driving forces with 172 districts and counties in the city cluster of Harbin， Changchun and central-southern Liaoning Province were constructed based on DMSP， VIIRS night images， and urban statistics data. The results indicated that the expansion of urban agglomeration reaches its peak during 2005—2009 and continues to decline after the peak， and the resources of central cities are concentrated while the development of sub-central cities is weak. Centripetal agglomeration centering around Harbin， Changchun， and the economic belt of central-southern Liaoning Province reflects the overall performance of urban agglomeration， with the western and southern areas expanding faster than the eastern and northern areas. The primary/secondary industries， population， and GDP are the main driving factors of urban agglomeration. From the perspective of spatial-temporal trend， industrial structure adjustment， population loss and weakening growth are the main influencing factors of the changes on urban agglomeration. The results of this research can provide reference for the future development planning of the city cluster of Harbin， Changchun and central-southern Liaoning Province.