Urban expansion and form changes across African cities with a global outlook: Spatiotemporal analysis of urban land densities

Xu, Gang; Dong, Ting; Cobbinah, Patrick Brandful; Jiao, Limin; Sumari, Neema S.; Chai, Baohui; Liu, Yaolin

dc.creator	Xu, Gang
dc.creator	Dong, Ting
dc.creator	Cobbinah, Patrick Brandful
dc.creator	Jiao, Limin
dc.creator	Sumari, Neema S.
dc.creator	Chai, Baohui
dc.creator	Liu, Yaolin
dc.date	2021-01-29T07:20:23Z
dc.date	2021-01-29T07:20:23Z
dc.date	2019-03-27
dc.date.accessioned	2022-10-25T08:51:52Z
dc.date.available	2022-10-25T08:51:52Z
dc.identifier	Gang, X., Dong, T., Cobbinah, B. P., Jiao, L., Sumari, N. S., Chai, B., Liu, Y. (2019). Urban expansion and form changes across Africa cities with a global outlook: Spatiotemporal analysis of urban land densities, Journal of Cleaner Production: https://doi.org/10.1016/j.jclepro.2019.03.276
dc.identifier	https://www.suaire.sua.ac.tz/handle/123456789/3370
dc.identifier.uri	http://hdl.handle.net/123456789/91854
dc.description	Africa has been experiencing rapid urbanization, yet limited studies have systematically investigated urban growth dynamics across African cities. Using 25 cities as cases, we quantified urban growth and form changes in Africa via spatiotemporal analysis of urban land densities in concentric rings over three time points (1990, 2000, and 2014). The results show that African cities have rapidly grown both in population and built-up areas, which increased by about 4% and more than 5% per annum, respectively. Urban land density (defined as the proportion of the built-up area to the buildable area) in each concentric ring decreases from the city center to the urban periphery with diverse patterns among cities. Comparatively, small cities have a lower urban land density and a more dispersed urban form than medium-sized and large cities in Africa. The international comparisons between cities with over one million population in Africa, Asia (e.g., China and India), Europe, and North America (i.e., the United States) reveal that African cities have a relatively less compact urban form. Implications of these findings for the future of African cities are further proffered.
dc.format	application/pdf
dc.publisher	Journal of Cleaner Production
dc.subject	Urban expansion
dc.subject	Population growth
dc.subject	Urban land density
dc.subject	Urban form
dc.subject	Urban sustainability
dc.subject	Africa
dc.title	Urban expansion and form changes across African cities with a global outlook: Spatiotemporal analysis of urban land densities
dc.type	Article