Pub Date : 2021-03-01DOI: 10.1177/0975425321998036
I. Msuya, Irene R. Moshi, Francis Levira
Dar es Salaam is one of the most diverse cities in Tanzania in terms of its physical, social, economic, environmental and spatial features. This diversity has contributed to differences in built-up area, population density, as well as the pace of spatial development across different parts of the city. This study aims to examine the relationship between physical built-up area changes in Dar es Salaam, population density change and spatial development using remote sensing images and census data. The study finds that the city population has grown tremendously, with peri-urban wards in particular having experienced positive growth. Dar es Salam’s built-up area change and urban sprawl emerging at the city’s edges distinctly follows the pattern of demographic change. This is accompanied by substantial compact growth in the inner parts of the city. A number of factors such as transport, residential development, migration, high natural growth rates, public policies and land speculation are found to have contributed to these changes. Overall, the study aims to aid planning authorities in effectively responding to the rapid spatial development taking place in the city, for which a holistic approach that combines an understanding of physical and demographic changes is needed. By investigating the changing patterns in land use within this highly urbanizing city, it aims to generate insights into urban development control machineries and identify their underlying dynamics.
{"title":"Land Pattern of Highly Urbanizing Cities: Change in Built-up Area, Population Density and Spatial Development of the Sprawling Dar es Salaam City","authors":"I. Msuya, Irene R. Moshi, Francis Levira","doi":"10.1177/0975425321998036","DOIUrl":"https://doi.org/10.1177/0975425321998036","url":null,"abstract":"Dar es Salaam is one of the most diverse cities in Tanzania in terms of its physical, social, economic, environmental and spatial features. This diversity has contributed to differences in built-up area, population density, as well as the pace of spatial development across different parts of the city. This study aims to examine the relationship between physical built-up area changes in Dar es Salaam, population density change and spatial development using remote sensing images and census data. The study finds that the city population has grown tremendously, with peri-urban wards in particular having experienced positive growth. Dar es Salam’s built-up area change and urban sprawl emerging at the city’s edges distinctly follows the pattern of demographic change. This is accompanied by substantial compact growth in the inner parts of the city. A number of factors such as transport, residential development, migration, high natural growth rates, public policies and land speculation are found to have contributed to these changes. Overall, the study aims to aid planning authorities in effectively responding to the rapid spatial development taking place in the city, for which a holistic approach that combines an understanding of physical and demographic changes is needed. By investigating the changing patterns in land use within this highly urbanizing city, it aims to generate insights into urban development control machineries and identify their underlying dynamics.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"S165 - S182"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321998036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44186309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1177/0975425321997785
Duong H. Nong, J. Fox, S. Saksena, Christopher A. Lepczyk
The process by which cities (or urban areas) expand over time has remained a key focus for geographers, ecologists and other scientists interested in urban phenomena for decades. This study investigated the use of spatial metrics and population data for defining and mapping rural-urban transition zones in Hanoi and exploring urban growth models. The analysis showed that in 2010, about 30% of communes within Hanoi could be defined as rural, 38% as peri-urban and 32% as urban. The peri-urban communes showed a greater level of landscape fragmentation and a higher pace of population growth than rural communes. The urban landscape of Hanoi in 2010 shows characteristics of both transportation corridors and dispersed sites models—the two least eco-friendly models of urbanization. This study provides an effective method for mapping such rural-urban transition and identifies forms of urbanization in places where other socio-economic data sources are limited. This is particularly useful for planners and development agencies that require reliable methods for collecting and analysing data, which can enable them to assess variables along the rural-to-urban continuum.
{"title":"The Use of Spatial Metrics and Population Data in Mapping the Rural-Urban Transition and Exploring Models of Urban Growth in Hanoi, Vietnam","authors":"Duong H. Nong, J. Fox, S. Saksena, Christopher A. Lepczyk","doi":"10.1177/0975425321997785","DOIUrl":"https://doi.org/10.1177/0975425321997785","url":null,"abstract":"The process by which cities (or urban areas) expand over time has remained a key focus for geographers, ecologists and other scientists interested in urban phenomena for decades. This study investigated the use of spatial metrics and population data for defining and mapping rural-urban transition zones in Hanoi and exploring urban growth models. The analysis showed that in 2010, about 30% of communes within Hanoi could be defined as rural, 38% as peri-urban and 32% as urban. The peri-urban communes showed a greater level of landscape fragmentation and a higher pace of population growth than rural communes. The urban landscape of Hanoi in 2010 shows characteristics of both transportation corridors and dispersed sites models—the two least eco-friendly models of urbanization. This study provides an effective method for mapping such rural-urban transition and identifies forms of urbanization in places where other socio-economic data sources are limited. This is particularly useful for planners and development agencies that require reliable methods for collecting and analysing data, which can enable them to assess variables along the rural-to-urban continuum.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"156 - 168"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321997785","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44767908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1177/09754253211007830
B. Mondal, Pragya Sharma, Debolina Kundu, Sarita Bansal
Urbanization is considered as the key driver for land use and land cover (LULC) changes across the globe and Delhi is no exception to this phenomenon. The population of Delhi has almost doubled from 8.4 million in 1991 to 16.3 million in 2011. Correspondingly, the built-up area has also increased from 336.82 to 598.22 km 2 during 1999–2018. This urban expansion has led to emergence of serious ecological risk and fragmentation of the landscape. In this context, it is imperative to analyse the level of risks induced by such urban expansion and its underlying associations with other factors. This article quantifies the LULC changes in Delhi during 1999–2018 using Landsat 5 (TM) and Landsat 8 (OLI) data. A spatio-temporal sprawl induced risk assessment index has been developed by combining landscape fragmentation score and land use land cover vulnerability score. The landscape fragmentation score was based on four landscape metrics, whereas the vulnerability score was computed from LULC data. The article also assesses the association between risk areas and economic activities, environmental and infrastructural amenities that are considered key drivers of urban expansion in Delhi. To estimate spatio-temporal variability between risk areas and key drivers, ordinary least square regression and geographical weighted regression (GWR) were used. The GWR results reveal that sprawl-induced ecological risk in Delhi is strongly associated with economic activity, infrastructural accessibility and environmental amenities. This spatial empirical assessment also shows that urban growth incentives or services such as roads, metro rail, schools and hospitals can also create pressure on the landscape if local authorities arbitrarily provide these services across space without considering the associated risks.
{"title":"Spatio-temporal Assessment of Landscape Ecological Risk and Associated Drivers: A Case Study of Delhi","authors":"B. Mondal, Pragya Sharma, Debolina Kundu, Sarita Bansal","doi":"10.1177/09754253211007830","DOIUrl":"https://doi.org/10.1177/09754253211007830","url":null,"abstract":"Urbanization is considered as the key driver for land use and land cover (LULC) changes across the globe and Delhi is no exception to this phenomenon. The population of Delhi has almost doubled from 8.4 million in 1991 to 16.3 million in 2011. Correspondingly, the built-up area has also increased from 336.82 to 598.22 km 2 during 1999–2018. This urban expansion has led to emergence of serious ecological risk and fragmentation of the landscape. In this context, it is imperative to analyse the level of risks induced by such urban expansion and its underlying associations with other factors. This article quantifies the LULC changes in Delhi during 1999–2018 using Landsat 5 (TM) and Landsat 8 (OLI) data. A spatio-temporal sprawl induced risk assessment index has been developed by combining landscape fragmentation score and land use land cover vulnerability score. The landscape fragmentation score was based on four landscape metrics, whereas the vulnerability score was computed from LULC data. The article also assesses the association between risk areas and economic activities, environmental and infrastructural amenities that are considered key drivers of urban expansion in Delhi. To estimate spatio-temporal variability between risk areas and key drivers, ordinary least square regression and geographical weighted regression (GWR) were used. The GWR results reveal that sprawl-induced ecological risk in Delhi is strongly associated with economic activity, infrastructural accessibility and environmental amenities. This spatial empirical assessment also shows that urban growth incentives or services such as roads, metro rail, schools and hospitals can also create pressure on the landscape if local authorities arbitrarily provide these services across space without considering the associated risks.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"S85 - S106"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/09754253211007830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45943415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1177/0975425321997973
S. Katumba, David Everatt
Johannesburg and the broader Gauteng City-Region in which it is located are considered to be the economic powerhouse of South Africa. This has led to massive population growth in the region, as well as severe inequality. Given South Africa’s history of racially excluding black South Africans from urban areas, ongoing research in this area has to analyse land cover and define ‘sprawl’ in a context where the technical language has politically loaded overtones. This article tries to understand the scale of informality within a broader examination of urbanization and sprawl. It concludes that in the absence of a formally adopted urban edge and under massive pressure from population growth (natural and via migration), formal dwellings (residential and economic) have grown unchecked, and informality is now growing at high speed and also largely without regulation or control. With no apparent political will to stop urban sprawl, both informal and formal covers are steadily pushing towards provincial borders, while densifying in Johannesburg in particular.
{"title":"Urban Sprawl and Land Cover in Post-apartheid Johannesburg and the Gauteng City-Region, 1990–2018","authors":"S. Katumba, David Everatt","doi":"10.1177/0975425321997973","DOIUrl":"https://doi.org/10.1177/0975425321997973","url":null,"abstract":"Johannesburg and the broader Gauteng City-Region in which it is located are considered to be the economic powerhouse of South Africa. This has led to massive population growth in the region, as well as severe inequality. Given South Africa’s history of racially excluding black South Africans from urban areas, ongoing research in this area has to analyse land cover and define ‘sprawl’ in a context where the technical language has politically loaded overtones. This article tries to understand the scale of informality within a broader examination of urbanization and sprawl. It concludes that in the absence of a formally adopted urban edge and under massive pressure from population growth (natural and via migration), formal dwellings (residential and economic) have grown unchecked, and informality is now growing at high speed and also largely without regulation or control. With no apparent political will to stop urban sprawl, both informal and formal covers are steadily pushing towards provincial borders, while densifying in Johannesburg in particular.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"S147 - S164"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321997973","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48224142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1177/0975425321990384
F. H. Mardiansjah, P. Rahayu, D. Rukmana
Indonesia is home to more than 260 million people and is one of the world’s most rapidly urbanizing countries. Between 1980 and 2010, Indonesia’s urban population grew about fourfold, from 32.8 to 118.3 million. Using data from National Census publications, this article examines the urbanization patterns and trends in urban growth in Indonesia from 1980 to 2010. The urbanization process has increased the number of cities in Indonesia from 50 to 94 and expanded large urban regions. Most of these expanded urban regions are located on the island of Java, including the metropolitan areas of Jakarta, Bandung, Surabaya, Semarang, Malang, Surakarta and Yogyakarta. The article also identifies the emergence of non-statutory towns and new extended urban regions outside the jurisdictions of urban municipalities. The policy implications of the emergence of such urban areas are additionally discussed.
{"title":"New Patterns of Urbanization in Indonesia: Emergence of Non-statutory Towns and New Extended Urban Regions","authors":"F. H. Mardiansjah, P. Rahayu, D. Rukmana","doi":"10.1177/0975425321990384","DOIUrl":"https://doi.org/10.1177/0975425321990384","url":null,"abstract":"Indonesia is home to more than 260 million people and is one of the world’s most rapidly urbanizing countries. Between 1980 and 2010, Indonesia’s urban population grew about fourfold, from 32.8 to 118.3 million. Using data from National Census publications, this article examines the urbanization patterns and trends in urban growth in Indonesia from 1980 to 2010. The urbanization process has increased the number of cities in Indonesia from 50 to 94 and expanded large urban regions. Most of these expanded urban regions are located on the island of Java, including the metropolitan areas of Jakarta, Bandung, Surabaya, Semarang, Malang, Surakarta and Yogyakarta. The article also identifies the emergence of non-statutory towns and new extended urban regions outside the jurisdictions of urban municipalities. The policy implications of the emergence of such urban areas are additionally discussed.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"11 - 26"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321990384","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46938931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Book review: Jhabvala Renana and Bijal Brahmbhatt. The City Makers: How Women Are Building a Sustainable Future for Urban India","authors":"Darshini Mahadevia","doi":"10.1177/0975425321997712","DOIUrl":"https://doi.org/10.1177/0975425321997712","url":null,"abstract":"Jhabvala Renana and Bijal Brahmbhatt. The City Makers: How Women Are Building a Sustainable Future for Urban India. (Gurugram: Hachette India) 2020.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"169 - 172"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321997712","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43738287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1177/0975425321990378
Chi Minh Ho, L. T. Nguyen, A. Vo, D. Vo
Fossil energy consumption is considered a source of environmental degradation. While the demand for fossil energy increases during the process of urbanization, different nations rely upon different sources of fossil energy. As such, a one-size-fits-all approach in reducing the consumption of fossil fuels to improve the quality of the environment is neither logical, nor practical. This study investigates the short-term and long-term effects of urbanization in relation to fossil energy consumption from coal, gas and oil. The auto-regressive distributed lag (ARDL) is employed on the sample of five emerging ASEAN nations in the 1985–2018 period. The findings reveal that that urbanization in Indonesia, Malaysia and Thailand appears to be associated with an increase in coal consumption in the short run. In Vietnam, gas consumption will increase with urbanization. However, in the long run, urbanization in Thailand and Vietnam is linked to an increase in oil consumption. Urbanization in Indonesia, Malaysia and the Philippines leads to the reduction of coal consumption in the long run. Policy implications have emerged based on the findings of this study.
{"title":"Urbanization and the Consumption of Fossil Energy Sources in the Emerging Southeast Asian Countries","authors":"Chi Minh Ho, L. T. Nguyen, A. Vo, D. Vo","doi":"10.1177/0975425321990378","DOIUrl":"https://doi.org/10.1177/0975425321990378","url":null,"abstract":"Fossil energy consumption is considered a source of environmental degradation. While the demand for fossil energy increases during the process of urbanization, different nations rely upon different sources of fossil energy. As such, a one-size-fits-all approach in reducing the consumption of fossil fuels to improve the quality of the environment is neither logical, nor practical. This study investigates the short-term and long-term effects of urbanization in relation to fossil energy consumption from coal, gas and oil. The auto-regressive distributed lag (ARDL) is employed on the sample of five emerging ASEAN nations in the 1985–2018 period. The findings reveal that that urbanization in Indonesia, Malaysia and Thailand appears to be associated with an increase in coal consumption in the short run. In Vietnam, gas consumption will increase with urbanization. However, in the long run, urbanization in Thailand and Vietnam is linked to an increase in oil consumption. Urbanization in Indonesia, Malaysia and the Philippines leads to the reduction of coal consumption in the long run. Policy implications have emerged based on the findings of this study.","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"90 - 103"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321990378","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48354110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1177/0975425321997711
Yogita Lokhande
Yu-Min Joo and Teck-Boon Tan (Eds.). Smart Cities in Asia, Governing Development in the Era of Hyper-Connectivity (UK: Edward Elgar Publishing Limited in collaboration with Edward Elgar Publishing, Inc.), 2020 ISBN: 978-17-889-7287-1 (cased), 978-17-889-7288-8 (eBook).
{"title":"Book review: Yu-Min Joo and Teck-Boon Tan (Eds.). Smart Cities in Asia, Governing Development in the Era of Hyper-Connectivity","authors":"Yogita Lokhande","doi":"10.1177/0975425321997711","DOIUrl":"https://doi.org/10.1177/0975425321997711","url":null,"abstract":"Yu-Min Joo and Teck-Boon Tan (Eds.). Smart Cities in Asia, Governing Development in the Era of Hyper-Connectivity (UK: Edward Elgar Publishing Limited in collaboration with Edward Elgar Publishing, Inc.), 2020 ISBN: 978-17-889-7287-1 (cased), 978-17-889-7288-8 (eBook).","PeriodicalId":44690,"journal":{"name":"Environment and Urbanization ASIA","volume":"12 1","pages":"172 - 175"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0975425321997711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47958285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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