scholarly journals Urbanization and Urban Sprawl Issues in City Structure: A Case of the Sulaymaniah Iraqi Kurdistan Region

2019 ◽  
Vol 11 (2) ◽  
pp. 485 ◽  
Author(s):  
Sivan Jarah ◽  
Bo Zhou ◽  
Rebaz Abdullah ◽  
Yawen Lu ◽  
Wenting Yu
Keyword(s):  
Urban Development ◽  
Urban Sprawl ◽  
Urban Growth ◽  
Urban Areas ◽  
Driving Forces ◽  
Political Conflict ◽  
Kurdistan Region ◽  
Rapid Urbanization ◽  
Master Plans ◽  
City Structure

This novel study explores the driving forces and dynamics of rapid urbanization, highlighting the main causes and effects of urban explosion, environmental disruption, and city pattern transformation. This study was carried out that how urbanization and urban sprawl have influenced the structure of the city of Sulaymaniah in Kurdistan region of Iraq. This is because over the years many urban areas have experienced dramatic growth and population explosion that has resulted in the exhaustion of social amenities in the concerned communities. For this purpose, a qualitative method is used based on in-depth face-to-face interviews with local authority, including planners, architects, and experts of master planning, as well as professors in the academic institutions. This study also utilizes extensive document analysis to present the evolution of urban growth. The findings reveal that the autonomy, political conflict, non-implementation of master plans, and economic prosperity are the driving forces which are accelerating this urbanization process. It is proposed that the practical policies and strategic urban development plans are urgent requirement to control the unplanned urban growth and stimulate the desired sustainable future urban development.

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

2019 ◽  
Vol 11 (10) ◽  
pp. 2973 ◽  
Author(s):  
Berhanu Keno Terfa ◽  
Nengcheng Chen ◽  
Dandan Liu ◽  
Xiang Zhang ◽  
Dev Niyogi
Keyword(s):  
Urban Development ◽  
Spatial Patterns ◽  
Urban Growth ◽  
Driving Forces ◽  
Addis Ababa ◽  
Urban Expansion ◽  
Spatiotemporal Analysis ◽  
Rapid Urbanization ◽  
Master Plans ◽  
Coalescence Theory

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.

Managing the rapid Urban Growth for cities in transition countries

2012 ◽  
Vol 1 (1) ◽  
pp. 58-63
Author(s):  
Binak Beqaj ◽  
Ylber Limani ◽  
Driton Kryeziu
Keyword(s):  
Urban Development ◽  
Urban Growth ◽  
Rapid Growth ◽  
Urban Areas ◽  
Rapid Development ◽  
Urban Dynamics ◽  
Development Plans ◽  
Countries In Transition ◽  
City Structure ◽  
Definition Of

Through political transition, socio-economical trends of cities as urban areas contributed to huge movements of population from rural to urban areas or from small urban areas toward big urban areas, making them bigger, under the rapid growth. Those cities have faced: Overloads with number of citizens, Lack of adequate infrastructure and Creativity deficiency for drafting and implementing urban development vision. Consequently, the question is what qualitative life do cities offer when considering abovementioned suppositions related to rapid urban growth? In general, for cities under rapid development, experts and authorities have not sufficiently succeeded to develop proper methodologies to neutralize chaotically urban development trends for some inner or outer urban areas under the rapid growth, especially from countries in transition. In this context several reasons have been identified. Starting from not properly definition of land ownership and land destination, lack of urban development plans, not harmonized and not approved legislation framework, not established adequate mechanisms for monitoring and implementation of projects, lack of adequate expertise from specific fields, unsustainable transport modes, etc. This paper identifies the possibilities that may lead to the success of urban management for strategic development of rapid growth for urban areas. The approaches for improvement and change should be based on multidisciplinary actions from different organisational levels of society, proactively and in the same time acting on: Analytical aspect Planning aspect Organizational aspect Implementation aspect Furthermore, this concept should be based on multi-sectorial expertise and partnerships between different actors dealing with the complexity of urban development. As main guideline for management of spatial city structure of cities under rapid urban growth, can be considered concept which is based on management of transition from existing to new developed urban areas and inter-relation between inner and outer urban areas. This concept may possibly include the development of new urban areas and renovation of existing ones, establishing transitional networks for implementing urban policies versus urban dynamics. In this way will be encouraged to redefine investments and to strengthen public-private partnership, as basic spatial development concept.

scholarly journals Modeling Urban Growth and Land Use Transition Using SLEUTH Model: The Case of Dilla City, Ethiopia

2020 ◽  
Author(s):  
Yanit Mekonnen ◽  
Abel Hailu
Keyword(s):  
Land Use ◽  
Urban Development ◽  
Urban Sprawl ◽  
Urban Growth ◽  
Urban Areas ◽  
Input Image ◽  
Urban Transport ◽  
Growth Trend ◽  
Land Use Transition ◽  
Sleuth Model

Abstract Urban growth / urban sprawl are the extension of a residential region into the surrounding area. The negative face of urban development is urban sprawl, criticizing the cause of environmental deterioration, growing inequality and diminishing the viability of aesthetic and urban areas. An effective and efficient planning of urban development and changes in land use and its effects on the environment needs, among other important details, details on development trends and patterns. Over the years, several models of urban growth have been developed and used to predict trends of growth. SLEUTH models are used to simulate and predict urban growth and land use transition for 2020-2050 in the City of Dilla (Ethiopia) in the analysis of Geographic Information System (GIS). The word SLEUTH was derived from the model's input image specifications: slope, land cover, exclusion, urban, transport, and Hill shade. Input data preparation used a cumulative time series dataset of 30 years, i.e. 1989, 1999, 2009 and 2019, such as historical topographical maps and satellite imagery. The SLEUTH model uses the parameters of the best fit growth rule by narrowing coefficients in the calibration mode and passing them down to forecast potential urban growth trends, creating different probability maps and LULC maps. The models generated future urban growth pattern predicted in the 31 years' from 2019, there will be nearly 41.14% urban rise in 2020, 52.95% in 2030, 59.91% in 2040 and 64.30% in 2050. In general, the extension of the urban growth trend introduces new spreading centers that are indicative of urban growth.

scholarly journals Simulating Urban Growth Scenarios Based on Ecological Security Pattern: A Case Study in Quanzhou, China

2020 ◽  
Vol 17 (19) ◽  
pp. 7282
Author(s):  
Xiaoyang Liu ◽  
Ming Wei ◽  
Jian Zeng
Keyword(s):  
Urban Development ◽  
Urban Sprawl ◽  
Urban Growth ◽  
Limited Attention ◽  
Ecological Security ◽  
Rapid Urbanization ◽  
Growth Simulation ◽  
Security Pattern ◽  
Urban Growth Scenarios ◽  
Scientific Attention

In recent decades, the ecological security pattern (ESP) has drawn increasing scientific attention against the backdrop of rapid urbanization and worsening ecological environment. Despite numerous achievements in identifying and constructing the ecological security pattern, limited attention has been paid on applying ESP to predict urban growth. To bridge the research gap, this paper took Quanzhou, China as a study case and incorporated the identified ESP into an urban growth simulation with three distinct scenarios. Following the “ecological source–ecological corridor–ecological security pattern” paradigm, the ESP identification was carried out from four single aspects (i.e., water, geology, biodiversity, and recreation) into three levels (i.e., basic ESP, intermediate ESP, and optimal ESP). Grounded in an equally weighted superposition algorithm, the four single ESPs were combined as an integrated ESP (IESP) with three levels. Taking IESP as an exclusion element, urban growth simulation in 2030 was completed with thee SLEUTH model. Drawing on the three levels of IESP, our urban growth simulation contained three scenarios. In terms of urban sprawl distribution coupled with urban growth rate, an optimal urban growth scenario is recommended in this paper to balance both urban development and eco-environment protection. We argue that our ESP-based urban growth simulation results shed new light on predicting urban sprawl and have the potential to inform planners and policymakers to contribute to more environmentally-friendly urban development.

scholarly journals Spatial–Temporal Impacts of Urban Sprawl on Ecosystem Services: Implications for Urban Planning in The Process of Rapid Urbanization

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1210
Author(s):  
Xiaoyan Li ◽  
Gulinaer Suoerdahan ◽  
Zhenyu Shi ◽  
Zihan Xing ◽  
Yongxing Ren ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Urban Planning ◽  
Carbon Storage ◽  
Crop Yield ◽  
Urban Sprawl ◽  
Habitat Suitability ◽  
Urban Areas ◽  
Water Retention ◽  
Rapid Urbanization ◽  
Study Region

Rapid urbanization drives land cover change, affecting urban ecosystems and inducing serious environmental issues. The study region of Changchun, China was divided into three urbanization categories according to different urbanization levels and the characteristics of urban sprawl and changes and relationships between typical ecosystem services (ESs) under rapid urbanization were analysed. The results showed that Changchun has undergone considerable urban expansion since 2000, which has significantly impacted all ESs in terms of spatial and temporal heterogeneity. Habitat suitability and crop yield have relatively stronger service capacity in the study area. Since the expansion of large-scale infrastructures, the mean ES values of developed urban areas are the lowest among the three zones, except for water retention and sandstorm prevention in 2015, when the balance between all services decreased. Over the past 16 years, habitat suitability in developing urban areas has decreased to a large extent due to urban sprawl. Because of the improvement in agricultural science and technology, crop yield in three regions increased, while the area of cropland reduced from 1720 km2 to 1560 km2 (9.3%). Synergies between habitat suitability and carbon storage and habitat suitability and soil retention were detected in three areas. A trade-off between habitat suitability and water retention was detected in three areas. The interactions between crop yield and carbon storage, habitat suitability, and soil retention were more complex in this study region. In addition to water retention, urbanization index has a negative correlation with ESs. According to the results, some suggestions to alleviate ES loss during the process of rapid urbanization were proposed, which may guide scientific urban planning for sustainable urban development.

scholarly journals Effect of Urbanization on Ecosystem Service Values in the Beijing-Tianjin-Hebei Urban Agglomeration of China from 2000 to 2014

2020 ◽  
Vol 12 (24) ◽  
pp. 10233
Author(s):  
Shan Liu ◽  
Mingxia Yang ◽  
Yuling Mou ◽  
Yanrong Meng ◽  
Xiaolu Zhou ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Population Density ◽  
Water Conservation ◽  
Urban Areas ◽  
Driving Forces ◽  
Urban Agglomeration ◽  
Natural Ecosystem ◽  
Rapid Urbanization ◽  
Construction Land ◽  
The Sustainable Development

Rapid urbanization has led to the continuous deterioration of the surrounding natural ecosystem. It is important to identify the key urbanization factors that affect ecosystem services and analyze the potential effects of these factors on the ecosystem. We selected the Beijing, Tianjin, and Hebei (BTH) urban agglomeration to investigate these effects, and designed three indicators to map the urbanization level: Population density, gross domestic product (GDP) density, and the construction land proportion. Four indicators were chosen to quantify ecosystem services: Food production, carbon sequestration and oxygen production, water conservation, and soil conservation. To handle the nonlinear interactions, we used a random forest (RF) method to assess the effect of urbanization on ecosystem services in the BTH area from 2000 to 2014. Our study demonstrated that population density and economic growth were the internal driving forces affecting ecosystem services. We observed changing trends in the effect of urbanization: The effect of population density on ecosystem services increased, the effect of the proportion of construction land was consistent with population density, and the effect of GDP density on ecosystem services decreased. Our results suggest that controlling the population and GDP would significantly influence the sustainable development in large urban areas.

The Anthropogenic Factors on Urban Growth: An Empirical Quantification in China

2012 ◽  
Vol 518-523 ◽  
pp. 6042-6049 ◽  
Author(s):  
Xue Zhu Cui ◽  
Yao Wu Wang ◽  
Yuan Chang
Keyword(s):  
Urban Growth ◽  
Driving Forces ◽  
Arable Land ◽  
Urban Land Use ◽  
Effective Control ◽  
Anthropogenic Factors ◽  
Affecting Factors ◽  
Management Options ◽  
Rapid Urbanization ◽  
Industry Development

The rapid urbanization in China has caused significant urban land use changes and extensive urban growth these years. That has led to a dramatic decrease in arable land and would challenge the national food security. To understand the anthropogenic driving forces of urban growth and find out effective control methods, this study established the Hierarchical Liner Model (HLM) to explore the influence of such factors including society and economy, population, and industry development. On the base of factor analysis and HLM, the decomposition of the affecting factors for urban growth was performed, it visually shows that the social retail goods, public transit passengers, and nonagricultural populations significantly drove the urban growth in China; the tertiary industry development has weak effects on urban growth. By weighting the role of the anthropogenic factors on urban growth, some advices were given at last, and it could provide possible management options for the government to mitigate the excessive urban growth in the near future.

Monitoring of Rapid Urban Sprawl in Beijing with Time Series Remote Sensing Data and Analysis of Driving Forces

2013 ◽  
Vol 726-731 ◽  
pp. 4591-4595 ◽  
Author(s):  
Jin Ling Zhao ◽  
Dong Yan Zhang ◽  
Hao Yang ◽  
Lin Sheng Huang
Keyword(s):  
Economic Development ◽  
Urban Area ◽  
Urban Sprawl ◽  
Urban Areas ◽  
Driving Forces ◽  
Urban Expansion ◽  
Sustainable Urban Development ◽  
Significant Information ◽  
South Central ◽  
Urban Construction

Beijing has experienced a rapid urban sprawl over the past three decades, along with accelerated socio-economic development. This study investigated the change patterns and figured out the driving forces of urban expansion in the study area. To obtain urban class, decision tree classification techniques were used to identify the land cover types using four scenes of Landsat images from four periods of 1978-era, 1992-era, 2000-era and 2010-era. Then, the urban areas were identified by excluding water, agriculture, forest, grassland and bare land. The analysis results showed that: 1) urban construction land had been expanded very quickly and the urban area is mainly in the south-central part of the municipality; 2) the urban area increased by 96284.97 ha and the ratio was 5.88%; and 3) population growth, economic development, urban construction and industrial structure adjustment could explain the expansion. These analysis results can provide significant information on the monitoring and management of sustainable urban development.

scholarly journals Patterns of Urban Spatial Expansion in European Cities

2019 ◽  
Vol 11 (8) ◽  
pp. 2247 ◽  
Author(s):  
Gianni Guastella ◽  
Walid Oueslati ◽  
Stefano Pareglio
Keyword(s):  
Urban Development ◽  
Urban Sprawl ◽  
Urban Areas ◽  
Land Use Changes ◽  
City Centre ◽  
Spatial Expansion ◽  
Demographic Trends ◽  
Configural Frequency Analysis ◽  
Primary Driver ◽  
Urban Population Growth

In representing urban sprawl, the decline in population and employment density from the city centre to the periphery has been identified as the main character associated with the spatial expansion of built-up areas. Urban spatial discontinuity, which occurs when the urban fabric includes built-up or green areas and a relevant share of vacant spaces, has gained recent attention. In this paper, we use Global Human Settlement Layer data to track urbanisation dynamics in European Functional Urban Areas (FUAs) from 1990 to 2014. We represent urban sprawl as the spatial expansion of FUAs associated with either or both declining population density and increasing built-up area discontinuity. We also consider the association with the demographic trends that have been described as the primary driver of urban spatial expansion. We use configural frequency analysis to explore the local association between the different characters of sprawl. We found evidence that urban sprawl effectively took differentiated forms across European FUAs. Even though FUAs have generally become less dense and more disperse, our results show that the extent of these phenomena appears to be more contained in recent years than in previous decades. Both elements of sprawl characterise FUAs with a shrinking population, confirming the decoupling of urban development policies and demographic trends in cities. The results call for better controlled urban development, favouring compact cities and subjecting land-use changes to a perspective of urban population growth.

scholarly journals Coupling Coordination Relationship between Urban Sprawl and Urbanization Quality in the West Taiwan Strait Urban Agglomeration, China: Observation and Analysis from DMSP/OLS Nighttime Light Imagery and Panel Data

2020 ◽  
Vol 12 (19) ◽  
pp. 3217
Author(s):  
Chunyan Lu ◽  
Lin Li ◽  
Yifan Lei ◽  
Chunying Ren ◽  
Ying Su ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Urban Sprawl ◽  
Urban Areas ◽  
Driving Forces ◽  
Urban Expansion ◽  
Taiwan Strait ◽  
Urban Agglomeration ◽  
The West ◽  
Nighttime Light ◽  
Nighttime Light Imagery

Urban sprawl is the most prominent characteristic of urbanization, and increasingly affects local and regional sustainable development. The observation and analysis of urban sprawl dynamics and their relationship with urbanization quality are essential for framing integrative urban planning. In this study, the urban areas of the West Taiwan Strait Urban Agglomeration (WTSUA) were extracted using nighttime light imagery from 1992 to 2013. The spatio-temporal characteristics and pattern of urban sprawl were quantitatively analyzed by combining an urban expansion rate index and a standard deviation ellipse model. The urbanization quality was assessed using an entropy weight model, and its relationship with urban sprawl was calculated by a coupling coordination degree model. The results showed that the urban area in the WTSUA experienced a significant increase, i.e., 18,806.73 km2, during the period 1992–2013. The central cities grew by 11.08% and noncentral cities by 27.43%, with a general uneven city rank-size distribution. The urban sprawl showed a circular expansion pattern, accompanied by a gradual centroid migration of urban areas from the southeast coast to the central-western regions. The coupling coordination level between urban expansion and urbanization quality increased from serious incoordination in 1992 to basic coordination in 2013. Dual driving forces involving state-led policies and market-oriented land reform had a positive influence on the harmonious development of urban sprawl and urbanization quality of the WTSUA. This research offers an effective approach to monitor changes in urban sprawl and explore the coupling coordination relationship between urban sprawl and urbanization quality. The study provides important scientific references for the formulation of future policies and planning for sustainable development in urban agglomerations.

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