Building in or out? Examining urban expansion patterns and land use efficiency across the global sample of 466 cities with million+ inhabitants

《Building in or out? Examining urban expansion patterns and land use efficiency across the global sample of 466 cities with million+ inhabitants》

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作者: Saurav Chakraborty;Indranil Maity;Hashem Dadashpoor;Josef Novotnẏ;Suranjana Banerji

来源: HABITAT INTERNATIONAL,Vol.120,P.102503

语言: 英文

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作者单位: Department Geography, Faculty of Natural and Mathematical Sciences, Presidency University, Kolkata, India;Department of Geography, University of Calcutta, Kolkata, India;Urban and Regional Planning Department, Faculty of Arts and Architecture, Tarbiat Modares University, Tehran, Iran;Department of Social Geography and Regional Development, Charles University, Prague, Czech Republic;Department Geography, Faculty of Natural and Mathematical Sciences, Presidency University, Kolkata, India;Department of Geography, University of Calcutta, Kolkata, India;Urban and Regional Planning Department, Faculty of Arts and Architecture, Tarbiat Modares University, Tehran, Iran;Department of Social Geography and Regional Development, Charles University, Prague, Czech Republic;School of Public Administration, Guangxi University, Nanning, 530004, China;Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, China;School of Public Affairs, Chongqing University, Chongqing, 400044, China;School of Public Affairs, Zhejiang University, Hangzhou, 310058, China;School of Architecture and Design, Zhejiang University of Technology, Hangzhou, Zhejiang, 310023, China;School of Design, Shanghai Jiao Tong University, Shanghai, 200240, China;Dr Daniel Ibrahim Dabara School of the Built Environment, Real Estate Programme, Faculty of Technology, Design and Environment, Oxford Brookes University, Oxford, United Kingdom;Department of Estate Management, Federal Polytechnic Ede, Osun State, Nigeria;Urban Geographies/Centre for Urban Studies, Universiteit van Amsterdam, Nieuwe Achtergracht 166, 1018 WV, Amsterdam, Netherlands;Department of Geography and Environmental Science, University of Southampton, United Kingdom;The Bartlett School of Planning, University College London, United Kingdom;School of Management and Economics, Beijing Institute of Technology, Beijing, China;Institute of Geography, Fujian Normal University, Fuzhou, Fujian, China;School of Geography, Nanjing Normal University, Nanjing, Jiangsu, China;School of Public Administration and Policy, Renmin University of China, Beijing, China;Department of Building and Real Estate, Hong Kong Polytechnic University, 999077, Hong Kong, China

摘要: Expansion of urban areas accompanied by decreasing population density results in inefficient urban growth from a spatial-ecological perspective. This study examines variations in the urban expansion patterns across 466 world cities with million + inhabitants in terms of the contribution of three growth modes (infilling, edge expansion, and outlying) and its relationship with urban land use efficiency, measured in terms of urban density. Focusing on two different time periods (1985–2000 and 2000–2015), it has been found that cities that experience inward expansion are largely located in the Global North, while cities in the Global South experience comparatively more outward than inward expansion. We also find a positive relation between inward expansion and the annual change rate of urban density. However, we hypothesize that this is largely attributed to pronounced variations in the initial per capita land consumption, particularly between cities located in the Global North and Global South. Indeed, when we examine the effect of NDEI on the end-point urban density, and control for the initial urban density, a different conclusion is achieved. We find that in the Global North, more inward expansion of cities decreases urban density compare to the subgroup of cities located in the Global South in which inward expansion amplifies urban density. Understanding such differential effects of urban expansion patterns on urban density is important for our advancement towards sustainable development goal indicator 11.3.1.