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Remote Sens. 2017, 9(1), 45; doi:10.3390/rs9010045

The Spatiotemporal Pattern of Urban Expansion in China: A Comparison Study of Three Urban Megaregions

1,2
and
1,2,*
1
University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
2
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, No. 18 Shuangqing Road, Beijing 100085, China
*
Author to whom correspondence should be addressed.
Academic Editors: Junxiang Li, Conghe Song and Prasad S. Thenkabail
Received: 10 November 2016 / Revised: 27 December 2016 / Accepted: 1 January 2017 / Published: 6 January 2017
(This article belongs to the Special Issue Remote Sensing of Urban Ecology)
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Abstract

Urban megaregions have emerged as a new urbanized form. However, previous studies mostly focused on urban expansion at the city scale, particularly for large cities. Understanding urban expansion at the regional scale including cities having different sizes is important for extending current knowledge of urban growth and its environmental and ecological impacts. Here, we addressed two questions: (1) How do the extent, rate, and morphological model of urban expansion vary at both the regional and city scales? (2) How do factors, such as city size and expansion rate, influence urban expansion models? We focused on the three largest urban megaregions in China, Beijing-Tianjin-Hebei (BTH), Yangtze River Delta (YRD) and Pearl River Delta (PRD). We quantified and compared the spatiotemporal pattern of urban expansion during 2000–2010 at both the regional and city scales based on remote sensing data. We used correlation analysis and linear regressions to address our research questions. We found that (1) the three urban megaregions experienced rapid and massive urban growth, but the spatiotemporal pattern varied greatly. Urban expansion was dominated by edge-expansion in the BTH, edge-expansion and infilling in the YRD, and infilling in the PRD. Cities in the same megaregion tended to have similar expansion morphology; (2) geographical location influenced the model of urban expansion the most, followed by city size and by its expansion rate. Small-sized cities were more likely to develop in a leapfrogging model, while cities with relatively rapid expansion tended to grow in an edge-expansion model. View Full-Text
Keywords: spatiotemporal pattern; urban growth; urban megaregion; urban morphology; Beijing-Tianjin-Hebei; Yangtze River Delta; Pearl River Delta spatiotemporal pattern; urban growth; urban megaregion; urban morphology; Beijing-Tianjin-Hebei; Yangtze River Delta; Pearl River Delta
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yu, W.; Zhou, W. The Spatiotemporal Pattern of Urban Expansion in China: A Comparison Study of Three Urban Megaregions. Remote Sens. 2017, 9, 45.

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