A comparative study of spatiotemporal patterns of urban expansion in six major cities of the Yangtze River Delta from 1980 to 2015

Fang, Chenyu; Zhao, Shuqing

doi:10.1080/20964129.2018.1469960

Cited by 33 publications

(15 citation statements)

References 48 publications

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“…Coalescence, on the other hand, consists of infilling existing built-up areas to form larger patches or outward expansion. This theory has been tested and results supporting both and against the hypothesis were generated [1,19,39,40]. Nevertheless, the extrapolation of the theory is still debatable.…”

Section: Introductionmentioning

confidence: 98%

“…There are numerous studies on the expansion of urban land in single metropolitan regions [3,4,6,15]. Changes and differences in the patterns of urban growth have been observed over time among some megacities [1,[16][17][18][19] and scattered pattern of urban growth has been confirmed in small and mid-sized cities [20][21][22]. However, particularly in Africa, urban growth patterns and population dynamics of cities, varying in size are not well-documented.…”

Section: Introductionmentioning

confidence: 99%

“…A number of quantitative approaches have been applied to compute measures of the dynamics and spatial patterns of urban landscapes, accelerated by the surge of developments of landscape ecology, remote sensing technology, Geographic Information Systems (GIS), and associated fields [6,11,18,[29][30][31][32]. In particular, landscape ecology methods such as landscape metrics and buffer gradient analysis have been increasingly used to characterize and compare the dynamic process of urban land use configurations [18,19,21,30,33,34]. Additionally, in a dynamic system, urban growth typologies (leapfrog, extension, and infill) are widely used to categorize urban growth forms by measuring how new development happened about the existing urban patches [29,35,36].…”

Section: Introductionmentioning

confidence: 99%

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Urban Expansion in Ethiopia from 1987 to 2017: Characteristics, Spatial Patterns, and Driving Forces

et al. 2019

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Rapid urban growth in major cities of a country poses challenges for sustainable development. Particularly in Africa, the process of rapid urbanization is little understood and research is mostly limited to single cities. Thus, this study provides a comprehensive comparative analysis of the growth and spatial patterns of urban development in the three major cities of Ethiopia (Addis Ababa, Adama, and Hawassa) from 1987 to 2017. Also, the applicability of diffusion and coalescence theory on the evolution of these cities has been tested. Remote sensing and GIS technologies were combined with spatial metrics and morphological analysis was employed to undertake this study. The result revealed that all the studied cities experienced accelerated growth in the urbanized areas, but the cities with a larger initial urbanized size were associated with lower expansion rates. Differences in extent and direction of expansion in each city were mostly related to physical features, urban master plans, and policies, with an increase in the irregularity and dispersion of urban growth, representing strong evidence of urban sprawl. The spatiotemporal analysis confirmed that the urbanization processes of Addis Ababa and Adama were consistent and Hawassa city diverged from expectations based on diffusion and coalescence theory. In general, large cities with strong economic growth in a country fail to effectively control the scattered nature of urban growth, thus requiring aggressive policy intervention. The approach used in this study permits a deeper exploration of urban development patterns and the identification of priority areas for effective urban planning and management.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Urban Expansion in Ethiopia from 1987 to 2017: Characteristics, Spatial Patterns, and Driving Forces

et al. 2019

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“…Consequently, exploration of the urban spatial dynamics and landscape structures analysis continues to of interest due to its high importance in creating sustainable cities.Several studies have investigated the effects of urban expansion on the landscape composition and configuration [10][11][12], investigating the existing and projected urban land dynamics [13], and exploring the patterns and possible drivers [14,15]. However, most of these studies have concentrated on large metropolitan regions due to their significant influences on socio-economic and environmental conditions [14,16]. In contrast, the smaller cities and towns, where scattered urban growth is more prominent [17][18][19], have been given little attention [20][21][22].…”

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confidence: 99%

Urbanization in Small Cities and Their Significant Implications on Landscape Structures: The Case in Ethiopia

et al. 2020

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Fundamental ideas concerning urbanization are primarily based on studies performed in large cities. It is of interest to study whether or not similar phenomena take place in smaller cities. Small cities are an inherent component of urbanization, and in the future, the majority of globalization is expected to occur in small and mid-sized cities. Understanding the effects of small cities on landscape structures is, therefore, an essential component in planning city land expansion. Accordingly, this study focused on six towns of the Oromia Special Zone Surrounding Finfinnee, Ethiopia, which is broadly known to be experiencing dramatic growth. Time-series Landsat images from 1987 to 2019 with an integrated method, landscape metrics, and built-up density analysis were employed to characterize and compare the dynamics of landscape structures, urban expansion patterns, process, and overall growth status in the towns. The results highlight that all the towns experienced accelerated growth in the built-up areas and highly scattered nature in spatial growth. Landscape ecology analysis confirmed a highly fragmented urban landscape, a significant loss of natural land covers, and disconnected and complicated agro-vegetation patches in all towns, suggesting a lack of rigorous implementation of the master plan. Results also indicated that the Oromia Special Zone surrounding Finfinnee has failed to control urban sprawl to surrounding ecological sensitive areas. The study results, more broadly, highlight that the small cities would have a limited physical and demographic footprint and relatively less contribution to the national economic agglomeration; nonetheless, they can have a notable and important impact in terms of their ecological and environmental influence. Hence, the study suggests policies for monitoring such dynamics and protecting agro-environmental connectivity with particular focus on the small cities.Sustainability 2020, 12, 1235 2 of 19 infrastructure and services. Whereas a compact spatial form can assist in implementing an enhanced transportation system as well as minimize the consumption of traffic energy-efficiency and resource utilization such as water pipe networks and drainage system [6,7]. However, some studies argue that the potential for damage to urban green spaces [8], increased traffic congestion, pollution, and crowded services [9] are notable shortcomings of compacting urban development. Even though there is some controversy regarding spatial growth types, the general agreement is that the urban spatial morphology can determine the social, environmental, and ecological situations of a city. Consequently, exploration of the urban spatial dynamics and landscape structures analysis continues to of interest due to its high importance in creating sustainable cities.Several studies have investigated the effects of urban expansion on the landscape composition and configuration [10][11][12], investigating the existing and projected urban land dynamics [13], and exploring the patterns and possible drivers [...

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“…(2) Many scholars have used one or more indexes of annual expansion area [24,[33][34][35], expansion rate [24,33,[36][37][38], growth rate [34,35], and expansion intensity [19,25,39] to study the speed of urban expansion, but few studies have combined the two indexes for analysis. Shi et al [40] introduced a composite index combining the two parameters of growth rate and form and defined the urban expansion type by this composite index.…”

Section: Literature Reviewmentioning

confidence: 99%

Spatial Evolution of Urban Expansion in the Beijing–Tianjin–Hebei Coordinated Development Region

et al. 2021

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Against the background of coordinated development of the Beijing–Tianjin–Hebei region (BTH), it is of great significance to quantitatively reveal spatiotemporal dynamics of urban expansion for optimizing the layout of urban land across regions. However, the urban expansion characteristics, types and trends, and spatial coevolution (including urban land, GDP, and population) have not been well investigated in the existing research studies. This study presents a new spatial measure that describes the difference of the main trend direction. In addition, we also introduce a new method to classify an urban expansion type based on other scholars. The results show the following: (1) The annual urban expansion area (UEA) in Beijing and Tianjin has been ahead of that in Hebei; the annual urban expansion rate (UER) gradually shifted from the highest in megacities to the highest in counties; the high–high clusters of the UEA presented an evolution from a “seesaw” pattern to a “dumbbell” pattern, while that of the UER moved first from Beijing to Tianjin and eventually to Hebei. (2) Double high speed for both UEA and UER was the main extension type; most cities presented a U-shaped trend. (3) Qinhuangdao has the largest difference between the main trend direction of spatial distribution of urban land, GDP and population; the spatial distribution of GDP is closer to that of urban land than population. (4) The area and proportion of land occupied by urban expansion varied greatly across districts/counties. BTH experienced dramatic urban expansion and has a profound impact on land use. These research results can provide a data basis and empirical reference for territorial spatial planning.

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A comparative study of spatiotemporal patterns of urban expansion in six major cities of the Yangtze River Delta from 1980 to 2015

Cited by 33 publications

References 48 publications

Urban Expansion in Ethiopia from 1987 to 2017: Characteristics, Spatial Patterns, and Driving Forces

Urban Expansion in Ethiopia from 1987 to 2017: Characteristics, Spatial Patterns, and Driving Forces

Urbanization in Small Cities and Their Significant Implications on Landscape Structures: The Case in Ethiopia

Spatial Evolution of Urban Expansion in the Beijing–Tianjin–Hebei Coordinated Development Region

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