2000-2020年滇中城市群不透水面时空动态演变及驱动力分析  

Spatiotemporal Dynamics and Driving Forces of Impervious Surfaces in the Central Yunnan Urban Agglomeration from 2000 to 2020

作　　者：丁雪[1,2,3] 邵馨 邓瑞芳 彭双云 王金亮[1,2,3] Ding Xue;Shao Xin;Deng Ruifang;Peng Shuangyun;Wang Jinliang(Faculty of Geography,Yunnan Normal University,Kunming 650500,China;Key Laboratory of Resources and Environmental Remote Sensing for Universities in Yunnan,Kunming 650500,China;Center for Geospatial Information Engineering and Technology of Yunnan Province,Kunming 650500,China;School of Information Science and Technology,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学地理学部,昆明650500 [2]云南省高校资源与环境遥感重点实验室,昆明650500 [3]云南省地理空间信息工程技术研究中心,昆明650500 [4]云南师范大学信息学院,昆明650500

出　　处：《水土保持研究》2024年第4期364-373,共10页Research of Soil and Water Conservation

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0184300);云南省自然科学基金(202101AT070052);云南省教育厅项目(2022J0139);云南师范大学博士研究生创新基金重点项目(YJSJJ21-A08)。

摘　　要：[目的]揭示滇中城市群不透水面时空动态演变特征及驱动力机制,进而为制定滇中城市群规划和发展策略提供理论参考。[方法]利用2000—2020年滇中城市群GISD 30 m不透水面数据,运用不透水面动态度、标准差椭圆、象限分析法和地理探测器等空间分析方法揭示了不透水面时空变化规律及驱动力机制。[结果](1)时间演变:近20年滇中城市群不透水面整体扩展速率呈现下降—上升—下降的波动趋势,年均扩展速率为66.77 km^(2)/a,年均动态度达4.36%,不透水面的动态度呈现不断下降趋势。近20年来,滇中城市群不透水面面积扩大了1402.2 km^(2),增长率高达91.5%。(2)空间演变上:近20年滇中城市群不透水面扩展各个城市空间差异较大,其中昆明市不透水面扩展较多,楚雄彝族自治州扩展面积较少。各城市群总体上朝南部—东南部方向扩展,迁移重心基本稳定。(3)近20年来滇中城市群不透水面的扩展具有明显的方向性,总体向东北—西南方向扩展。其中2005年标准差椭圆面积最大,不透水面开始高速扩张,20年来不透水面重心变化较为稳定,整体一直保持向南迁移,总体变化相对较小。(4)从不透水面的驱动机制分析,人口因素对其扩展的影响显著,而LAI、坡度、降水、温度以及NDVI等因素对不透水面扩展的影响不显著。人口和其他因素之间的交互作用强度明显强于其他因素之间的交互作用。[结论]近20年以来滇中城市群不透水面不断扩展,对城市群的资源环境承载力和国土空间格局产生巨大影响,为此应加强不透水面空间优化布局,为实现滇中城市群高质量跨越式发展提供有力支撑。[Objective]This study aims to analyze the spatiotemporal dynamic evolution characteristics and driving mechanisms of impervious surfaces in the central Yunnan urban agglomeration,and to provide a theoretical basis for related research and assisting government and relevant departments in formulating urban agglomeration planning and development strategies.[Methods]GISD 30-meter impervious surface data from the central Yunnan urban agglomeration for the years 2000 to 2020 were utilized.Spatial analysis methods such as dynamic degree,standard deviation ellipse,quadrant analysis,and geographical detector were employed to reveal the spatiotemporal patterns of impervious surface changes and their driving mechanisms.[Results](1)With respect to temporal scale evolution,over the past two decades,the overall expansion rate of impervious surfaces in the central Yunnan urban agglomeration exhibited a fluctuating trend characterized by decline-rise-decline,with an annual average expansion rate of 66.77 km^(2).The annual average dynamic degree reached to 4.36%,indicating a continuous decline in the dynamism of impervious surfaces.The impervious surface area in the urban agglomeration expanded by 1402.2 km^(2) during this period,with a growth rate of 91.5%.(2)With respect to spatial scale evolution,the expansion of impervious surfaces within various cities of the central Yunnan urban agglomeration over the last two decades displayed significant spatial disparities.For instance,Kunming witnessed substantial expansion of impervious surfaces,while Chuxiong Prefecture exhibited comparatively minimal expansion.On the whole,the urban agglomeration expanded towards the southern and southeastern directions,with the migration center remaining relatively stable.(3)With respect to directionality,the expansion of impervious surfaces in the central Yunnan urban agglomeration over the past 20 years showed a clear directional trend,primarily expanding in the northeast to southwest direction.The largest standard deviation ellipse area in year 2

关 键 词：不透水面 滇中城市群 时空演变 驱动力分析 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]