近30年长江中游城市群土地利用/覆盖时空格局分析  

Spatio-temporal Analysis of Land Use/Land Cover Pattern Changes in Triangle of Central China in the Past 30 Years

作　　者：王昀琛 周晓 王鹏龙 李柏延 韩伟孝 侯金亮 WANG Yunchen;ZHOU Xiao;WANG Penglong;LI Boyan;HAN Weixiao;HOU Jinliang(Collaborative Innovation Center for Urbanization Construction of Anhui Province,Hefei 230009,China;School of Computer Science and Technology,Xi’an University of Posts and Telecommunications,Xi’an 710061,China;Real Estate Registration Center of Shangluo City,Shangluo 726000,China;Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;School of Geography and Tourism,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]安徽省城镇化建设协同创新中心,安徽合肥230009 [2]西安邮电大学计算机学院,陕西西安710061 [3]商洛市不动产登记中心,陕西商洛726000 [4]中国科学院西北生态环境资源研究院,甘肃兰州730000 [5]陕西师范大学地理科学与旅游学院,陕西西安710119

出　　处：《遥感技术与应用》2025年第1期132-143,共12页Remote Sensing Technology and Application

基　　金：安徽省城镇化建设协同创新中心开放课题(XTCX2024KF03);国家自然科学基金项目(42301455);陕西师范大学教学改革研究项目(23GGYS-JG06);中央高校基本科研业务费专项资金(GK202304024);国家自然科学基金项目(42101259);陕西省科学技术协会青年人才托举计划项目(XXJS202234);甘肃省青年科技基金计划(22JR5RA090)。

摘　　要：土地利用/覆被变化是研究全球环境变化和可持续发展的重要基础。基于Google Earth Engine(GEE)平台和随机森林算法,对长江中游城市群1990、2000、2010和2020年的Landsat卫星影像进行快速、高效地解译,追踪土地利用/覆被变化的时空格局变化。结果表明:①2020年长江中游城市群主要由耕地和植被构成,面积占比在86%以上,耕地和植被主要分布在城市群的四周、城乡建设用地呈散团式镶嵌其中的空间格局;②土地利用数量结构上整体呈现城乡建设用地和耕地持续增加、植被和未利用地呈波动式减少、水域波动式微弱增加的发展趋势;在土地利用转移上,主要呈现出建设用地斑块遍地开花并伴随局部爆炸式扩张,植被流向耕地,未利用地流向植被和耕地的演变态势;③在土地利用空间集聚演变方面,土地利用程度的较热点、热点都在增加,极热点区总体逐渐减少,而较热点则相反,热点呈增加的趋势,且全部位于武汉城市圈及其周围;土地利用程度较冷点总体上呈先减少后增加的趋势,且较冷点区由环长株潭城市群(湘潭市、萍乡市和株洲市)转向环鄱阳湖城市群(南昌市)。长江中游城市群建设用地和耕地空间集聚范围呈持续扩大态势,且集聚程度随集聚范围的扩张同步加强,中等密度和较低密度区扩展区随着城市群的快速发展逐渐演变为热点区域。研究结果为生态型城市群的土地资源保护与可持续利用提供了有效的决策依据。Land use/cover change is an essential part of the frontier of global climate change and sustainable de⁃velopment.In this paper,based on Google Earth Engine(GEE)platform,we used Landsat remote sensing im⁃ages of 1990,2000,2010,and 2020,combined with Random Forest(RF)algorithm and field survey to se⁃quentially decode the four phases of land use/cover data in the order of build-up area,water,vegetation,farm⁃land,and unused land and tracked the spatial and temporal patterns of land use/cover changes in the Triangle of Central China.The results show that①In 2020,the Triangle of Central China will mainly be composed of farmland and vegetation,accounting for more than 86%of the area,with farmland and vegetation mainly dis⁃tributed around the urban agglomeration,build-up area in a spatial pattern of scattered clusters mosaic;②Over the past 30 years,the quantitative structure of land use and land-use transfer in the study area have varied,with the land use structure showing an increased continuously in build-up area and farmland,a fluctuating increase trend of vegetation and unused land,and a weak increase trend of water;and③The results of the analysis of the evolution of spatial clustering of land use focusing on build-up area and farmland show that the hotter and hot spots of land use degree are increasing.In general,the extreme hot spot area is gradually decreasing,while the hotter sites are on the contrary,and the hot spots are growing in trend,and all of them located in and around Wuhan city circle.The study results lay the foundation for the research on the conservation and sustainable use of land resources in ecological urban agglomeration.

关 键 词：Google Earth Engine 土地利用/覆被变化 时空特征 随机森林算法 长江中游城市群 

分 类 号：F301.2[经济管理—产业经济] P901[天文地球—自然地理学]