In pursuit of sustainability – Spatio-temporal pathways of urban growth patterns in the world's largest megacities

Chakraborty, Saurav; Dadashpoor, Hashem; Novotný, Josef; Maity, Indranil; Follmann, Alexander; Patel, Priyank Pravin; Roy, Utpal; Pramanik, Suvamoy

doi:10.1016/j.cities.2022.103919

Cited by 38 publications

(11 citation statements)

References 88 publications

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“…Meanwhile, more proactive policies are also needed to manage the future urban growth of large cities [54]. For example, by encouraging vertical expansion of high-rise development, brownfield redevelopment, and infill development that fully integrates green infrastructure into urban design [55], the negative impact of urban expansion on habitat may be mitigated to some extent.…”

Section: Strategies For Habitat Conservationmentioning

confidence: 99%

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Impacts of different levels of urban expansion on habitats at the regional scale and their critical distance thresholds

Chen

Liu²

2023

Environ. Res. Lett.

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With the rapid development of urbanization, natural habitats in many parts of the world have been seriously damaged by urban expansion. However, urban expansion is a complex process, and the impacts of different levels of urban expansion on habitats at regional scales and their distance thresholds are still unclear. We conducted a study in Hubei Province, China to evaluate the impacts of the expansion of prefecture-level cities and county towns on the quantity, area, and quality of natural habitats and the critical threshold distances affecting habitats. The results show that, at a regional scale, habitat degradation was driven primarily by the expansion of large numbers of county towns, but the expansion of prefecture-level cities affected habitat degradation over greater distances . Specifically, the impact of county town expansion on habitat first increased and then decreased with greater distance from built-up areas, the threshold distances for habitat quantity and quality being approximately 8 km and 80 km, respectively. The impact of expanding prefecture-level cities on habitat showed a similar nonlinear change with greater distance, but the distance thresholds for habitat quantity and quality rose to approximately 40 km and 130 km, respectively. These findings not only reverse the conventional view that the expansion of large cities dominates habitat degradation, but also draws more attention to the influence of the expansion of numerous small county and towns on habitat, when measured at the regional scale. Understanding the distance threshold of particular spatial impacts can be help to inform spatial decision-making with regards to habitat conservation.

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Section: Strategies For Habitat Conservationmentioning

confidence: 99%

“…With 68% of the world's population expected to live in cities by 2050 [6], urban expansion will continue into the foreseeable future. Urban expansion is the expansion of built-up areas beyond the existing periphery of settlements [7,8].…”

Section: Introductionmentioning

confidence: 99%

Impacts of different levels of urban expansion on habitats at the regional scale and their critical distance thresholds

Chen

Liu²

2023

Environ. Res. Lett.

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“…Regarding the total landscape, rurban and peri-urban areas also show the highest rates of landscape instability, while the areas closest to the urban center are the most stable. Based on the diffusion-coalescence theory (Chakraborty et al, 2021;Duany et al, 2011;Estoque & Murayama, 2015), we can see that the MDQ's urbanization tends toward a diffuse, axial and isolated expansion pattern, rather than an "infill" pattern (Inostroza et al, 2013). Several studies have found that dispersed urban sprawl can present negative environmental and social impacts, such as: demand for new and expensive infrastructure for low-density neighborhoods, reduction and fragmentation of natural areas, low accessibility to services, facilities and public spaces, high dependence on fossil fuel since the mobility model focuses on the private vehicle, and spatial segregation, among others (Hermida et al, 2015;Ortiz Báez et al, 2020;Reis et al, 2016;Rueda, 2009).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Analysis of Peri-Urban Landscape Composition and Its Spatio-Temporal Transformations: The Case of the Metropolitan District of Quito

Ortiz-Báez

Freire

Bogaert

2023

Journal of Architecture and Urbanism

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Latin American contemporary cities are facing a rapidly urban dispersion which is mainly occurring in periurban zones. Since these transitional spaces remain geographically and conceptually unclear, having a greater understanding of its landscape composition has become a key issue for territorial planning purposes. In this article, the Metropolitan District of Quito urban-rural gradient landscape composition and its spatiotemporal transformations are analysed. Using satellite images of very high resolution of two periods, five Land Use-Land Covers (LULC) were identified in sixty-four sample polygons. Based on that, a transition matrix and a stability index were developed to analyse landscape composition change intensity. Results demonstrate that peri-urban areas show the highest landscape instability, although through a great diversity of land occupation typologies. The four dominant typologies are analysed. Parsing LULCs independently, vegetation showed the greatest instability, which significantly alters ecosystems and their services. On the other hand, mega-road infrastructure appears to be one of the most dramatic drivers of peri-urban transformation, since samples crossed by new highways experienced the greatest landscape transformation on average. Finally, this methodology and insights could be extrapolated to other Latin American cities, where micro-scale policymaking should be a priority in scenarios of complex and highly heterogeneous peri-urbanization.

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“…According to the location of construction land growth, its expansion form generally includes leapfrogging, edge-expansion, and infilling (Chakraborty et al, 2022). Among them, leapfrogging refers to the newly developed construction land patches that are not connected to existing construction land; edge-expansion means that the newly developed construction land patches extend outwards along the boundaries of existing construction land; infilling refers to the conversion of non-construction land patches into construction land within existing construction land (Figure 3).…”

Section: Mapping Construction Land Expansion Processesmentioning

confidence: 99%

Exploring the urban–rural gradient effects of construction land expansion processes on land use function trade‐off/synergy in rapidly urbanizing areas

Li,

Zhu,

Deng

2023

Land Degrad Dev

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Construction land expansion greatly affects the supply and interaction of distinct land use functions, particularly in rapidly urbanizing areas. However, existing research rarely focuses on the urban–rural gradient role of different construction land expansion processes in affecting the interactions between land use functions, which limits the refined high‐quality development of territorial space. Using the main urban area of Hangzhou as an example, this research analyzed the spatiotemporal transmission process of trade‐offs/synergies among distinct functions between urban and rural regions from the living‐production‐ecological function perspective, and probed the differences in the impact of distinct urban and rural construction land expansion processes on them across different urban–rural gradients, thereby proposing the urban–rural spatial development pathways for promoting synergistic territorial spatial patterns. The results showed that the changes in different functions had an obvious urban–rural gradient difference. During 2000–2020, the trade‐off between living function and other functions increased continuously, and regions with a higher trade‐off primarily shifted from urban development areas to urban–rural transition areas. The infilling and edge‐expansion of urban construction land were more favorable to the increased synergy between distinct functions; the infilling and edge‐expansion of rural construction land in urban development and urban–rural transition areas greatly reduced the functional trade‐off level, while its leapfrogging in rural development areas strongly affected the synergy between distinct functions. These findings can help to restrict unreasonable urban and rural construction land expansion processes as well as promote synergistic territorial space patterns in rapidly urbanizing regions.

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In pursuit of sustainability – Spatio-temporal pathways of urban growth patterns in the world's largest megacities

Cited by 38 publications

References 88 publications

Impacts of different levels of urban expansion on habitats at the regional scale and their critical distance thresholds

Impacts of different levels of urban expansion on habitats at the regional scale and their critical distance thresholds

Analysis of Peri-Urban Landscape Composition and Its Spatio-Temporal Transformations: The Case of the Metropolitan District of Quito

Exploring the urban–rural gradient effects of construction land expansion processes on land use function trade‐off/synergy in rapidly urbanizing areas

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