摘要
以城市群为对象研究建设用地的时空演变及其驱动力,对促进国土空间高质量发展具有重要价值。故以长江中游城市群为例,利用多期Landsat TM/ETM遥感数据,综合运用扩张强度指数、多元回归分析、地理探测器等方法,对该城市群建设用地演变的时空特征及其驱动机制进行了分析。结果表明:2000—2020年间,长江中游城市群建设用地持续扩大,不同时段的增长面积和扩张强度有所不同,且研究期内城镇主导型、中度开发型和低度开发型斑块数量明显上升,而自然生态型斑块数量明显下降;城市群内各地区建设用地演变存在明显差异,总体呈现出“多中心扩散”的空间格局;人口密度、GDP密度、距交通线距离等是城市群建设用地演变的主要驱动力,多个因子交互的影响大于单个因子的影响。因此,建议加强中心城市的辐射带动作用,推动中小城市产业发展和配套建设,建立大中小城市有效协作的机制和路径,并促进土地制度及政策的改革与完善,激活城市存量用地,推进长江中游城市群国土空间高质量发展。
It is of great value to study the spatio-temporal evolution of construction land with its driving forces in urban agglomeration for the promotion of a high-quality development of territorial space.Taking urban agglomeration in the middle reaches of the Yangtze River as an example,an analysis has been made of the spatio-temporal characteristics and driving mechanism of the evolution of urban agglomeration construction land by using multi-stage Landsat TM/ETM data,expansion intensity index,multiple regression and geographic detector.The results show that from 2000 to 2020,the construction land of urban agglomeration in the middle reaches of the Yangtze River shows a continual expansion trend,with a diversity in the growth area and expansion intensity in different periods.Throughout the study period,the number of urban-dominated,moderately-developed and lowly-developed patches has increased significantly,while the number of natural ecological patches has decreased significantly.There is a significant diversity in the intensity of construction land expansion among different regions within the urban agglomeration,presenting an overall spatial pattern of “polycentric diffusion”. Population density, GDP density and distance from traffic lines are the main driving forces for the expansion and evolution of construction land in urban agglomeration, with the influence of multiple factor interaction greater than that of a single factor. Therefore, it is suggested to strengthen the radiation and driving role of central cities, seeking the promotion of the industrial development and supporting construction of small and medium-sized cities, establishment of mechanisms and paths for an effective cooperation between large and medium-sized cities, facilitation of the reform and improvement of land systems and policies, activation of the urban stock land, and acceleration of the high-quality development of land and space of urban agglomeration in the middle reaches of the Yangtze River.
作者
王坤
贺清云
梅予健
莫振淳
WANG Kun;HE Qingyun;MEI Yujian;MO Zhenchun(School of Geography Science,Hunan Normal University,Changsha 410006,China)
出处
《湖南工业大学学报》
2022年第6期79-89,共11页
Journal of Hunan University of Technology
基金
湖南省自然科学基金资助项目(2020JJ4277)。
关键词
建设用地
时空演变
驱动机制
地理探测器
长江中游城市群
construction land
spatiotemporal evolution
driving mechanism
geodetector
urban agglomeration in the middle reaches of the Yangtze River
