首页|广西北部湾经济区城市群空间扩展研究——基于夜间灯光数据

广西北部湾经济区城市群空间扩展研究——基于夜间灯光数据

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  • NETL
  • NSTL
  • 万方数据
以2013年、2017年、2021年3期夜间灯光数据作为数据源,借助GIS技术提取规定阈值的灯光分布区域表征城市建成区范围,通过城市空间扩展强度指数、扩展速度、紧凑度、标准差椭圆等方法分析广西北部湾经济区城市群空间扩展特征、扩展格局,并借助灰色关联分析法探究城市群空间格局变化的驱动机制.结果表明:(1)从空间扩展特征看,广西北部湾城市群空间以外延式扩展为主,整体紧凑度偏低,外围轮廓紧凑性较差.(2)从空间扩展格局看,城市群空间逐步形成南宁—北海—钦州—防城港城镇发展轴,崇左、玉林作为重要节点城市同步扩展,初步形成协同发展格局.(3)城市群空间分布格局由"北—南"向"西北—东南",最后向"东—西"方向逐步演变,标准差椭圆面积缩小,重心整体向西北方向(南宁)移动.(4)从驱动机制看,影响城市群空间扩展的主导因素是以地区生产总值为代表的经济发展.
Spatial Expansion of Urban Agglomerations in Guangxi Beibu Gulf Economic Zone Based on Night-time Lighting Data
This study used the night-time lighting data of 2013, 2017 and 2021 as the data source,with the help of GIS technology to extract the light distribution area with the specified threshold to characterize the scope of the urban built-up area. Through the urban spatial expansion intensity index, expansion rate, compactness, stand-ard deviation ellipse and other indicators to analyze its spatial expansion characteristics and expansion pattern, and combined with the grey correlation analysis method to explore the driving mechanism of urban spatial pattern change. The results show that:(1) From the perspective of spatial expansion characteristics, the urban space in the study area is dominated by epitaxial expansion, the overall compactness is low and the peripheral contour com-pactness is poor. (2) From the perspective of spatial expansion pattern, the urban space of the study area has grad-ually formed the Nanning-Beihai-Qinzhou-Fangchenggang urban development axis. Chongzuo City and Yulin City, as important node cities, have expanded synchronously and initially formed a coordinated development pattern. (3) The urban spatial distribution pattern gradually evolved from'north-south' to'northwest-southeast' , and finally to'east-west' . The area of the standard deviation ellipse decreased, and the center of gravity moved to the northwest (Nanning) as a whole. (4) From the perspective of driving mechanism, the dominant factor affecting the expan-sion of urban space in the study area is the economic development represented by regional GDP.

night-time lightingurban agglomerationsspatial expansiondriving mechanism analysisGuangxi Beibu Gulf Economic Zone

陈展图、冯冰、肖丽梅、谢玲

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广西师范大学环境与资源学院,广西 桂林541004

广西师范大学广西生态脆弱区环境过程与修复重点实验室,广西 桂林541004

夜间灯光数据 城市群 空间扩展 驱动机制分析 广西北部湾经济区

广西哲学社会科学规划研究课题项目2022年度珠江—西江经济带发展研究院科学研究基金项目广西师范大学2024年度国家社科基金培育项目

21FYJ057ZX20220122024PY020

2024

10.3969/j.issn.1003-2363.2024.03.012

地域研究与开发
河南省科学院 地理研究所

地域研究与开发

CSTPCDCHSSCD北大核心
影响因子：1.698
ISSN：1003-2363
年,卷(期)：2024.43(3)