Same planet but different worlds! Diverging convergence pattern of urban form typologies across 413 cities with million+ inhabitants and their sustainability trade-offs

IF 6.5 1区 经济学 Q1 DEVELOPMENT STUDIES
Saurav Chakraborty , Josef Novotný , Indranil Maity , Richard Lemoine-Rodríguez , Alexander Follmann
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Abstract

Low-density urban expansion presents a worldwide urban land use sustainability challenge, resulting in increased land consumption and heightened landscape fragmentation. Existing research looks at the impacts of various urban form typologies on these two effects independently. We try to close this gap by identifying the urban form of 413 cities with million+ inhabitants worldwide as well as their simultaneous contribution to both land consumption and fragmented built-up land. We found that dispersed-continuous and compact-continuous typologies are predominant in cities in the Global North, whereas dispersed-fragmented and compact-fragmented typologies are prevalent in cities in the Global South. This effectively demonstrates the ‘diverging convergence’ pattern of urban form typologies across Global North and Global South. Our results further unravel that cities in the Global North divulge less built-up fragmentation while consuming more land. Contrarily, cities in the Global South consume less land per capita but have a more fragmented built-up area. It serves as a metaphor for regional trade-offs of urban land use sustainability, particularly if adopting a synchronic perspective on the global urban sustainability. Urban policy should prioritize finding ways to lessen adverse consequences linked with specific urban form typologies to effectively tackle urban land use sustainability trade-offs.

Abstract Image

同一个地球,不同的世界!413 个百万人口以上城市的城市形态类型的不同趋同模式及其可持续性权衡
低密度城市扩张带来了全球城市土地利用可持续性的挑战,导致土地消耗增加和景观破碎化加剧。现有研究分别研究了各种城市形态类型对这两种效应的影响。我们试图填补这一空白,确定全球 413 个百万人口以上城市的城市形态,以及它们对土地消耗和建筑用地破碎化的同时贡献。我们发现,分散-连续型和紧凑-连续型城市形态在全球北方城市中占主导地位,而分散-分散型和紧凑-分散型城市形态在全球南方城市中占主导地位。这有效证明了全球北方和全球南方城市形态类型的 "分化趋同 "模式。我们的研究结果进一步揭示出,全球北方的城市在消耗更多土地的同时,其建筑碎片化程度较低。相反,全球南部城市的人均土地消耗较少,但建成区却更加分散。这是对城市土地利用可持续性的区域权衡的一种隐喻,尤其是如果采用全球城市可持续性的同步视角。城市政策应优先考虑如何减少与特定城市形态类型相关的不利后果,以有效解决城市土地利用可持续性权衡问题。
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来源期刊
CiteScore
10.50
自引率
10.30%
发文量
151
审稿时长
38 days
期刊介绍: Habitat International is dedicated to the study of urban and rural human settlements: their planning, design, production and management. Its main focus is on urbanisation in its broadest sense in the developing world. However, increasingly the interrelationships and linkages between cities and towns in the developing and developed worlds are becoming apparent and solutions to the problems that result are urgently required. The economic, social, technological and political systems of the world are intertwined and changes in one region almost always affect other regions.
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