摘要
以我国经济快速发展新兴城市合肥市为例,基于夜间灯光数据,从城市化水平、扩张能力和时空转移特征3个方面分析合肥市2005—2020年间建成区的时空演变,并对影响因素进行探讨。结果表明,采用夜间灯光数据提取的合肥市建成区范围平均相对误差为2.41%,建成区总体呈现以南、北向为主导的环状扩展状态。复合灯光指数能有效表征合肥市建成区城市化发展水平,在此期间,城市化水平增幅超两倍。建成区重心经过“西南—东南—西南”的转移过程整体向南偏移,人口紧凑度呈现先内部聚集后外部扩散再重新聚集的“震荡”特征,总体趋于紧凑发展的态势。建成区时空演变主要受社会经济因素驱动影响,同时也受到交通与人口因素的正向驱动。
Taking Hefei,an emerging city with rapid economic development in China,as an example,based on night light data,this paper analyzed the spatio-temporal evolution of Hefei’s builtup areas from 2005 to 2020 from three aspects of urbanization level,expansion capacity and spatiotemporal transfer characteristics and discussed the influencing factors.The results showed that the average relative error of Hefei built-up areas extracted from night light data is 2.41%,and the built-up areas showed a circular expansion dominated by south and north directions.The level of urbanization development in the built-up areas of Hefei can be effectively represented by the composite light index and the urbanization level increased by more than twice during the study period.The center of gravity of the built-up area showed a transition process as“southwest—southeast—southwest”,with an overall shift towards the south.The population compactness presented an“oscillation”process of concentration,diffusion,and concentration with an overall compact development.The spatiotemporal evolution of built-up areas was mainly driven by socio-economic factors,as well as positively driven by transportation and population factors.
作者
张义颖
郭庆彪
吕鑫
ZHANG Yiying;GUO Qingbiao;LYU Xin(School of Spatial Informatics and Geomatics Engineering,Anhui University of Sciences and Technology,232001,Huainan,Anhui,PRC;Key Laboratory of Aviation-aerospace-ground Cooperative Monitoring and Early Warning of Coal Mining induced Disasters of Anhui Higher Education Institutes,Anhui University of Science and Technology,232001,Huainan,Anhui,PRC;Coal Industry Engineering Research Center of Mining Area Environmental and Disaster Cooperative Monitoring,Anhui University of Science and Technology,232001,Huainan,Anhui,PRC)
出处
《江西科学》
2024年第2期424-429,共6页
Jiangxi Science
基金
国家自然科学基金项目(52274164)
中国科协青年托举人才工程项目(2022QNRC001)
安徽省重点研究与开发计划项目(202104a07020001)。
关键词
夜光遥感
建成区
城市扩张
时空演变
night-time light remote sensing
built-up area
urban expansion
spatial-temporal evolution
