Spatial and Temporal Dynamics of Urban Expansion along the Guangzhou-Foshan Inter-City Rail Transit Corridor, China
Spatial and Temporal Dynamics of Urban Expansion along the Guangzhou-Foshan Inter-City Rail Transit Corridor, China
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DOI：
10.3390/su10030593
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发表时间：
2018-03-01
期刊：
影响因子：
3.9
通讯作者：
Gao, Feng
中科院分区：
文献类型：
--
作者：
Li, Shaoying;Liu, Xiaoping;Gao, Feng
了解城际轨道交通走廊沿线的城市扩展过程对于城市群的区域一体化至关重要。虽然许多研究考虑了轨道交通对土地利用和城市形态的影响，但大多数研究集中在当地车站区域或市内城市结构。很少有研究考察区域尺度下城际轨道交通走廊的影响和动态过程。本研究采用多源遥感影像、景观度量学和梯度分析相结合的方法，研究了广佛城际地铁沿线城市扩展的时空动态和区域结构变化。将泰森多边形引入样方分区进行景观梯度分析，清晰地揭示了地铁断面沿线景观变化的空间变化。基于扩散-融合增长的理论框架，进一步识别了区域扩张阶段和城际结构变化。这项研究表明，广佛地铁在建设过程中对城市边缘的城市扩张产生了显着影响。在建设之前，随着坡度从城市中心向城市边缘移动，城市斑块变得不规则和支离破碎。在广佛地铁的影响下，城市斑块不断扩展，形成一个同质的城市化区域，这表明城市的集聚是主导的扩张阶段，区域结构更加集聚。这表明，城际轨道交通在推动广佛都市圈一体化方面发挥了重要作用。
Understanding the urban expansion process along inter-city rail transit corridors is critical to regional integration of city groups. Though numerous studies have considered the influences of rail transit on land use and urban form, most have focused on local station areas or intra-city urban structures. Few studies have examined the effects and dynamic process along inter-city rail transit corridors at a regional scale. In this study, multi-remote sensing images, landscape metrics and gradient analysis were combined to investigate the spatial and temporal dynamics of urban expansion and regional structural changes along the GuangFo inter-city Metro in the Pearl River Delta, south China. We introduced Thiessen Polygon into quadrat zoning for landscape gradient analysis, and clearly revealed the spatial variations of landscape changes along the metro transect. The regional expansion stage and inter-city structural changes were further detected based on the theoretical framework of diffusion-coalescence growth. This study revealed that during its construction the GuangFo Metro significantly impacted urban expansion at the urban fringes. Before construction the urban patches became irregular and fragmented as the gradient moved from city centers to city fringes. Influenced by the GuangFo Metro, the urban patches expanded and consequently coalesced into a homogenous urbanized area, which indicated that coalescence was the dominant expansion stage and the regional structure become more aggregated. This suggested that the inter-city rail transit has played an important role in promoting the integration of the GuangFo metropolitan region.