水土保持研究2024，Vol.31Issue(4)：364-373,10.DOI:10.13869/j.cnki.rswc.2024.04.003
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
摘要
Abstract
[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 km2.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 1 402.2 km2 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 2005 was marked,signifying the onset of rapid impervious surface expansion.Over the 20-year period,the center of impervious surface expansion remained relatively stable,consistently shifting southward with relatively minor overall changes.(4)Analysis of driving mechanisms indicated that population factors had a significant impact on impervious surface expansion,whereas factors such as LAI,slope,precipitation,temperature,and NDVI had less significant effects.The interaction strength between population and other factors was notably stronger than that between other factors.[Conclusion]Over the past two decades,impervious surfaces in the central Yunnan urban agglomeration had continued to expand,exerting a significant influence on the resource and environmental carrying capacity of the urban agglomeration and the spatial land use pattern.To support the high-quality leapfrog development of the central Yunnan urban agglomeration,an emphasis on optimizing the spatial layout of impervious surfaces is crucial.关键词
不透水面/滇中城市群/时空演变/驱动力分析Key words
impervious surfaces/central Yunnan urban agglomeration/spatiotemporal evolution/driving force analysis分类
信息技术与安全科学引用本文复制引用
丁雪,邵馨,邓瑞芳,彭双云,王金亮..2000-2020年滇中城市群不透水面时空动态演变及驱动力分析[J].水土保持研究,2024,31(4):364-373,10.基金项目
国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0184300) （2018YFE0184300）
云南省自然科学基金(202101AT070052) （202101AT070052）
云南省教育厅项目(2022J0139) （2022J0139）
云南师范大学博士研究生创新基金重点项目(YJSJJ21-A08) （YJSJJ21-A08）
