Urban agglomeration of Kunming and Yuxi cities in Yunnan, China: the relative importance of government policy drivers and environmental constraints
Urban agglomeration of Kunming and Yuxi cities in Yunnan, China: the relative importance of government policy drivers and environmental constraints
复制标题
中国云南昆明和玉溪城市群：政府政策驱动和环境约束的相对重要性
DOI：
10.1007/s10980-019-00790-2
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发表时间：
2019
影响因子：
5.2
通讯作者：
Yang Zijiang
中科院分区：
文献类型：
--
作者：
Zhang Zhiming;Wang Bin;Buyantuev Alex;er;He Xiong;Gao Wei;Wang Yajin;Dawazhaxi;Yang Zijiang
背景政治决策和政策，以及生物物理因素是城市群的重要驱动因素，但这些因素之间的联系以及与这些因素相关的决策和景观变化的研究还很缺乏。目的探讨近年来政治、经济决策和地形因素驱动的昆明-玉溪城市群格局和过程。利用空间趋势面分析和空隙指数对昆明市和玉溪市的城市化同质化过程进行量化。结果土地覆盖图显示，2015年土地覆盖面积显著增加，约占总面积的13%，农用地由2000年的12.2%下降到2015年的6.7%。此外，90%以上的城市地区位于平坦地区。空间变化趋势揭示了昆明市和玉溪市的集聚特征。空隙分析还表明，建成区空间的均质性增强，导致城市的连通性增强。结论空间趋势和空隙分析支持过去15年间城市适度同质化和集聚形成的结论。昆明和玉溪两市政府于2011年签署的“昆明-玉溪城市群一体化”协议，以及其他类似的政策，促进了城市的扩张。此外，由于云南高原地形崎岖，城市增长也受到地形模式的影响。
ContextPolitical decisions and policies, as well as bio-physical factors are very important drivers of urban agglomeration, yet studies researching links between those factors, decision-making and landscape change associated with these processes are lacking.ObjectivesThe objective of this study was to explore the urban agglomeration pattern and process of Kunming–Yuxi driven by recent political and economic decisions, as well as topographic factors.MethodsWe used multi-temporal Landsat imagery to create land cover maps and detect land cover changes from 2000 to 2015. The spatial trend surface analysis and lacunarity index were used to quantify the homogenization process of urbanization between Kunming and Yuxi.ResultsLand cover maps showed that built-up area increased remarkably reaching about 13% of the total area in 2015, and agricultural land declined from 12.2% in 2000 to 6.7% in 2015. Moreover, more than 90% of urban areas are located in flat areas. Spatial trends revealed the agglomeration of Kunming and Yuxi city. The lacunarity analysis also indicated that the homogeneity of built-up space increased resulting in increased connectivity of the cities.ConclusionsSpatial trends and lacunarity analyses support the finding that moderate urban homogenization and agglomeration formation took place during the past 15 years. The “Integration of urban agglomeration of Kunming and Yuxi cities” agreement signed by the governments of the two cities in 2011, along with other similar policies, has contributed to the urban expansion. Moreover, because of the rough topography of Yunnan Plateau, the urban growth has also been shaped by topographic patterns.