摘要
掌握城市建设用地扩张的特征是控制城镇化进程中建设用地无序扩张的前提。研究选取辽宁省不同方位的4个城市(沈阳、大连、丹东、朝阳)作为典型案例城市,基于1990、2000、2010、2020年4期遥感影像数据,采用建设用地占比、扩张强度指数、扩张强度差异指数、公共边测度法等方法对研究区城市建设用地分异特征进行研究。结果表明:4个城市建设用地空间扩张差异明显,1990—2020年,建设用地总体占比由4.74%迅速增至11.58%;1990—2020年,扩张强度从大到小依次为沈阳、大连、丹东和朝阳,其中,大连一直处于高速扩张状态,沈阳和丹东在第一时期为低速扩张,在第二、第三时期转为高速扩张,朝阳由低速扩张转至高速扩张,又转为中速扩张;1990—2020年,沈阳、朝阳及丹东城市扩张差异逐渐减小,大连城市扩张差异增大;4个城市3种扩张模式并存,整体上主要以蔓延式扩张为主,飞地式次之,填充式面积较小。城市发展主要呈现四周扩散的蔓延式发展,但城市间由于自身发展需求不同,存在一定差异。
Understanding the characteristics of urban land expansion is essential for managing the uncontrolled growth of construction areas during the urbanization process.Four representative cities,namely Shenyang,Dalian,Chaoyang,and Dandong,located in various directions within Liaoning Province,were chosen for this study.Employing remote sensing image data from 1990,2000,2010,and 2020,the research employed metrics such as the proportion of construction land,expansion intensity index,expansion intensity difference index,and the public edge measurement method to investigate the distinctive attributes of urban construction land within the designated area.The findings reveal significant variations in the spatial expansion of construction land across the four cities.Between 1990 and 2020,the overall share of construction land expanded considerably from 4.74% to 11.58%.During this period,the order of expansion intensity shifted from high to low as follows:Shenyang,Dalian,Dandong,and Chaoyang.Notably,Dalian exhibited rapid expansion,Shenyang and Dandong initially underwent slow expansion,transitioning to higher rates during the second and third phases,Chaoyang expanded from low speed to high speed,and then to medium speed.Over the same period,the divergence in urban expansion trends of Shenyang,Chaoyang,and Dandong diminished gradually,while Dalian experienced an increasing discrepancy in its expansion pattern.The four cities employed a combination of three expansion modes,with predominant reliance on sprawl development,followed by enclave development,infill development was relatively minimal.The overarching urban growth trend revolved around outward development.However,distinct development needs led to variations among the cities.
作者
郭力娜
訾丰娇
姜广辉
赵艳霞
王刚
Guo Lina;Zi Fengjiao;Jiang Guanghui;Zhao Yanxia;Wang Gang(College of Mining Engineering,North China University of Technology,Tangshan 063210,Hebei,China;Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China;College of Management,North China University of Technology,Tangshan 063210,Hebei,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第5期1635-1650,共16页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金青年基金项目(40801221)
辽宁省国土空间生态修复规划编制(专题研究)项目(20210208)
华北理工大学教育教学改革研究与实践重点建设项目(ZJ2010)。
关键词
城市建设用地
扩张强度
扩张模式
城市空间演变
时空分异特征
urban construction land
expansion strength
expansion mode
urban spatial evolution
temporal and spatial differentiation characteristics
