摘要
随着城市的快速发展,城市化进程也在不断加快,为了适应经济社会的飞速发展和人口的增长速度,随之而来的是城市用地增加,为更好地控制城市的空间扩展,研究城市空间扩展和驱动力尤为重要。本文以徐州市建成区1981年、1991年、2001年、2011年和2021年5个年份时相的遥感影像为数据源,利用遥感信息提取技术获取徐州市的城市扩展信息,从数量、形态、重心、方向4个角度分析城市空间扩展特征,并运用回归模型探究徐州城市扩展的主要驱动因素。结果表明:(1)1981—2021年共40年间城市整体扩张强度为26%,年均扩展面积为36.03 km2,其中2001—2011年是城市扩展强度最剧烈的一段时间;(2)城市空间扩展分形维数和紧凑度总体趋于稳定,使得城市空间更加规则,紧凑度得到提高;(3)城市空间扩展总体以东、东南、南方向进行发展,城市重心逐渐向东南方向移动;(4)城市空间扩展幅度明显增加的方位是在东部、南部、东南部,城市空间整体呈现条带状扩展延伸;(5)回归分析结果表明,人口、基础设施和政策规划因素对徐州市城市空间扩展影响较为显著,而经济因素也会对城市的发展产生一定的影响。
With the rapid development of the city,the process of urbanization is also accelerating,in order to adapt to the rapid development of economic society and the growth rate of population,followed by the increase of urban land.In order to better control the urban spatial expansion,it is particularly important to study the urban spatial expansion and driving force.In this paper,remote sensing images of five years(1981,1991,2001,2011 and 2021)in the built-up area of Xuzhou city are used as data sources,and remote sensing information extraction technology is used to obtain urban expansion information of Xuzhou city.The characteristics of urban spatial expansion are analyzed from four perspectives:quantity,morphology,center of gravity and direction.The regression model is used to explore the main driving factors of Xuzhou’s urban expansion.The results show that:(1)The overall urban expansion intensity is 26%during the 40 years from 1981 to 2021,and the average annual expansion area is 36.03 km2,among which 2001-2011 is the most intense period of urban expansion intensity;(2)The fractal dimension and compactness of urban space expansion tend to be generally stable,making urban space more regular and compactness improved;(3)The overall urban spatial expansion develops in the east,southeast and south direction,and the center of gravity of the city gradually moves to the southeast direction;(4)The expansion of urban space increases significantly in the east,south and southeast,and the urban space as a whole presents a banded expansion;(5)The results of regression analysis show that population,infrastructure and policy planning factors have a significant impact on the urban spatial expansion of Xuzhou city,and economic factors will also have a certain impact on the urban development.
作者
张诗婷
欧向军
ZHANG Shiting;OU Xiangjun(School of Geography,Mapping and Urban and Rural Planning,Jiangsu Normal University,Jiangsu Xuzhou,221116,China;Research Center of Urbanization,Jiangsu Normal University,Jiangsu Xuzhou,221116,China)
出处
《上海国土资源》
2024年第1期59-65,共7页
Shanghai Land & Resources
基金
国家自然科学基金项目“新发展格局下区域极化与协调联动发展的调控机理研究”(42271177)。
关键词
城市空间扩展
遥感影像
驱动因素
多元回归分析
urban spatial expansion
remote sensing image
driving factors
regression analysis
