Ding Xue,Shao Xin,Deng Ruifang,et al.Spatiotemporal Dynamics and Driving Forces of Impervious Surfaces in the Central Yunnan Urban Agglomeration from 2000 to 2020[J].Research of Soil and Water Conservation,2024,31(04):364-373.[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
- Title:
- Spatiotemporal Dynamics and Driving Forces of Impervious Surfaces in the Central Yunnan Urban Agglomeration from 2000 to 2020
- 文章编号:
- 1005-3409(2024)04-0364-10
- Keywords:
- impervious surfaces; central Yunnan urban agglomeration; spatiotemporal evolution; driving force analysis
- 分类号:
- TP79
- 文献标志码:
- A
- 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 km2/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1 402.2 km2,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。
- 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.
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备注/Memo
收稿日期:2023-07-22 修回日期:2023-09-21
资助项目:国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0184300); 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)
第一作者:丁雪(1983—),男,云南陆良人,博士研究生,副研究员,研究方向为资源环境遥感、遥感智能信息处理。E-mail:dingxue_1983@163.com
通信作者:王金亮(1963—),男,云南武定人,博士,教授,主要从事遥感与GIS在资源环境方面的应用研究。E-mail:1374349752@qq.com