Three-Dimensional Urban Expansion Analysis of Valley-Type Cities: A Case Study of Chengguan District, Lanzhou, China

Sijia He, Xiaoyun Wang, Jingru Dong, Baocheng Wei, Hanming Duan, Jizong Jiao and Yaowen Xie
Additional contact information
Sijia He: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China
Xiaoyun Wang: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China
Jingru Dong: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China
Baocheng Wei: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China
Hanming Duan: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China
Jizong Jiao: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China
Yaowen Xie: College of Earth and Environmental Sciences, Lanzhou University, No. 222, Tianshui South Road, Chengguan District, Lanzhou 730000, China

Sustainability, 2019, vol. 11, issue 20, 1-18

Abstract: The development of cities in the vertical dimension is important in valley-type cities where physical growth is limited by terrain. However, little research has focused on three-dimensional urban expansion of valley-type cities. Lanzhou is a typical valley-type city in China and Chengguan District is the core area of Lanzhou City. This research is aimed at understanding the development of valley-type cities through the analysis of the three-dimensional urban expansion of Lanzhou Chengguan District and providing a reference for urban planning. We extracted five periods of architectural contours and height information between 1975 to 2018 with the support of multi-source remote sensing and network data. We used overlay analysis and mathematical statistical methods to analyze urban horizontal expansion and used the building density, floor area ratio, vertical expansion speed, fluctuation degree, and skyline to analyze urban vertical expansion. We found that the mode of horizontal expansion of Chengguan District shifted from adjacency to enclave through mountain area reclamation. The area with the fastest vertical expansion speed first appeared in the horizontal expansion completed area, and then in both the rapid horizontal expansion area and in the horizontal expansion completed area. Before 2007, the speed of horizontal expansion increased and reached its peak while the vertical expansion speed was relatively stable. After that, the former decreased, and the vertical expansion increased rapidly and dominated the urban development. The vertical expansion of the valley-type city gradually dominates urban development. Urban planning should consider the three-dimensional expansion, especially in the vertical dimension.

Keywords: valley-type city; three-dimensional urban expansion; vertical urban expansion; Lanzhou Chengguan District (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/2071-1050/11/20/5663/pdf (application/pdf)
https://www.mdpi.com/2071-1050/11/20/5663/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:11:y:2019:i:20:p:5663-:d:276305

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().