南方丘陵地区河谷城市用地时空演变与驱动分析——以上饶市城区为例

以揭示中国南方丘陵地区河谷城市的空间演变过程和特征为目的,以上饶市城区为例,在遥感与GIS技术的支持下,对1988~2013年间上饶市城区城市用地的时空演变过程、特征及驱动影响因素进行了研究。结果表明,1988~2013年的25 a间,上饶市城区城市用地呈现出快速增长的态势,城市形态的演变具有明显的时空特征:时间序列上,不论扩展幅度还是扩展速度,2001~2013年间的值均高于1988~2001年间的值,前后两个时段的扩展特征呈现出明显的差异性;空间格局上,上饶市城区以老城区的中心广场为中心向四周扩展,先后经历了放射性扩展、组团式分散扩展两个阶段,同时呈现出明显的方向分异性,西南和西为其主要扩展方向,而其东南方向的扩展速度最为缓慢。自然环境中的地貌对上饶市城区城市用地的扩展起到很大的限制作用,经济社会的发展、政策规划等因素成为城市用地扩张与时空演化的外在驱动因素。

ANALYSIS ON SPATIAL-TEMPORAL EVOLUTION AND DRIVING FACTORS OF RIVER VALLEY CITY IN SOUTHERN CHINA HILLY REGION: TAKING SHANGRAO URBAN AREA AS A CASE

In order to reveal the process and driving of river valley city in southern China hilly region, this paper takes Shangrao urban area as an exanple and studies the spatial-temporal process, characteristics and driving factors of urban land expansion in Shangrao based on the technology of remote sensing and GIS.The results show that, in the 25 years from 1988-2013, the Shangrao city land showed a rapid growth trend, and the city form evolution has distinct temporal characteristics:regardless of rate or the expansion speed is extended during 2001-2013, the values were higher during 1988-2001 value, and propagation characteristics before and after the two periods showed obvious difference. City Center Plaza in the old city center has gone through the radioactive extension, group type scattered expansion of two stages, also presents the obvious direction difference. The main expansion direction is southwest and west, and propagation speed of the southeast direction is the most slow. The landform of the natural environment has great restriction effect on the urban land expansion of Shangrao urban area, the driving factors on the urban land expansion in Shangrao urban area are the development of Economic and society, the government policies and urban plan.