摘要
文章基于1993—2017年环洞庭湖生态经济区城市群DMSP/OLS和NPP-VIIRS夜间灯光遥感数据与ArcGIS,采用参考数据辅助对比法提取城市群建成区范围,利用Landsat 8遥感影像和Kappa系数进行精度检验,运用时空扩展规模、重心偏移及景观格局形态分析方法对城市群演变进行分析。主要结论如下:①动态阈值法提取夜光数据城市群建成区与实际符合,演变规律与规划、经济和政策贴合,经过中速调整过渡—高速边缘扩展—低速内部填充—快速飞地式扩展过程,呈现复杂周期性变化。②城市群重心由荆州市石首市南移至益阳市南县内,常德市与岳阳市主导城市群快速发展。③景观格局破碎度较高,空间连通性较弱,城镇相对独立,城市群呈"五核"空间扩展模式。
This paper combines the nighttime light remote sensing data of DMSP/OLS and NPP-VIIRS in the Dongting Lake Eco-economic Zone Urban Agglomeration from 1993 to 2017 with ArcGIS.The reference data-assisted comparison method is used to extract the range of built-up area of the urban agglomeration.It uses the remote sensing images of Landsat 8 and Kappa coefficient to test the research accuracy,and analyzes the evolution of urban agglomeration by the means of the spatial-temporal expansion scale,shift of gravity center and landscape pattern analysis.The main conclusions are as follows:1)Dynamic threshold method is used to extract the luminous data of urban agglomeration built-up area,which is in line with the actual situation,the law of evolution is consistent with city planning,economy and policy.It shows complex periodic changes in the expansion of the Dongting Lake Eco-economic Zone Urban Agglomeration,which experiences four stages in sequence:medium-speed adjustment transition,high-speed edge expansion,low-speed internal filling,higher-speed enclave expansion.2)The gravity center of the urban agglomeration moves from Shishou City in Jingzhou City to Nan County in Yiyang City.Changde City and Yueyang City play dominant role in the rapid development of urban agglomeration.3)The fragmentation of the landscape pattern is high,the spatial connectivity is weak,the cities and towns are relatively independent,and the urban agglomeration presents a"five-core"spatial expansion model.
作者
李茜铭
郑伯红
熊羽军
LI Qianming;ZHENG Bohong;XIONG Yujun(School of Architecture and Art,Central South University,Changsha 410083,Hunan,China;32022 Troops,Wuhan 430070,Hubei,China)
出处
《经济地理》
CSSCI
CSCD
北大核心
2021年第2期92-102,共11页
Economic Geography
基金
国家自然科学基金面上项目(51478470)
湖南省研究生科研创新项目(CX2018B075)
中南大学研究生自主探索创新项目重点项目(502221802)
关键词
夜间灯光数据
洞庭湖生态经济区
城市群
城市建成区
景观格局
重心分析
生态保护
night light data
Dongting Lake Eco-economic zone
urban agglomeration
urban built-up area
landscape pattern
focus analysis
ecological protection
作者简介
李茜铭(1990—),女,湖南岳阳人,博士研究生,研究方向为城市空间结构与发展控制、基于遥感数据的城市分析。E-mail:188379083@qq.com;通讯作者:郑伯红(1966—),男,广东韶关人,博士,教授,博士生导师,研究方向为城乡功能结构网络化与网络城市、城市空间与发展控制。E-mail:2543930211@qq.com
