摘要
中国西南地区的城市发展起步晚、水平低,研究西南地区的城市扩展的时空变化并进行定量驱动分析可为山地城市的未来发展提供参考。选取云贵川三省的省会城市为研究对象,使用1990—2020年的Landsat影像数据并结合城市总体规划提取成都、昆明、贵阳3个城市的建成区,采用多种空间测度分析指标,分析三座城市的建成区时空变化特征;基于结构方程模型,并结合多项社会经济数据分析推动城市发展的驱动因素。结果表明:1990—2020年,三座城市的扩展速率持续增快,扩展强度先增后减,城市边界不断加长,紧凑度持续降低,城市空间质心迁移距离持续增大,城市空间扩展过程较为粗糙;1990—2020年,扩展模式以“条带状”和“星状填充”为主,城市扩展方向多顺延山脉走向,多山的地形影响了城市建设进程;社会因素驱动城市空间扩展的总效应最大,人口因素与经济因素次之,按各因素驱动城市扩展的总效应可排序为:社会因素(1.294)>人口因素(0.863)>经济因素(0.742)。研究结果可为山区城市的发展规划提供科学建议。
Urban development in the southwest of China started late and at a low level,the study on the spatial and temporal changes of urban expansion in Southwest China and quantitative driven analysis can provide a reference for the future development of mountainous cities.Based on the capital cities of Yunnan,Guizhou,and Sichuan provinces.The built-up areas of Kunming,Guiyang,and Chengdu were extracted by using Landsat images from 1990 to 2020 and combined with the urban plan.Various spatial-analysis measures were used to analyze the spatial and temporal characteristics of the built-up areas among these cities.Based on the structural equation model,using a number of socio-economic data to examine the drivers of urban development.The results show that during 1990—2020,the expansion rate of the three cities continues to increase,the intensity of expansion first increases and then decreases,the city boundaries continues to lengthen,the compactness continues to decrease,the distance between the spatial center of the city continues to increase.The process of urban spatial expansion is relatively rough.During 1990—2020,the expansion pattern is mainly“strip-like”and“star-shaped filling”,and the direction of urban expansion is mainly forced by the mountain range.The mountainous relief affects the urban construction process.The total effect of social factors driving urban spatial expansion is the largest,followed by demographic and economic factors,and the total effect of each factor driving urban expansion can be ranked as follows:social factors(1.294)>demographic factors(0.863)>economic factors(0.742).The research results can provide scientific advice for urban development planning in mountainous areas.
作者
许冬凡
张加龙
刘钱威
冯亚飞
XU Dong-fan;ZHANG Jia-long;LIU Qian-wei;FENG Ya-fei(Forestry College,Southwest Forestry University,Kunming 650224,China;Faculty of Geography,Yunnan Normal University,Kunming 650500,China;Kunming Information Center,Kunming 650500,China)
出处
《科学技术与工程》
北大核心
2022年第20期8616-8622,共7页
Science Technology and Engineering
基金
国家自然科学基金(31860207,31770677)
西南林业大学科研启动基金(111932)
2020年云南省高层次人才培养支持计划“青年拔尖人才”专项(81210468)。
关键词
云贵川
城市扩展
结构方程模型
驱动分析
Yunnan-Guizhou-Sichuan
urban expansion
structural equation model
driver analysis.
