scholarly journals Modeling Emissions Sources and Characterization in a Dense Low-Income Township Near Industrial Zones and Mine Dumps (Case of Tsakane, South Africa).

2021 ◽  
Author(s):  
Shonisani Singo ◽  
Jean Mulopo
Keyword(s):  
South Africa ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Low Income ◽  
Clustering Algorithm ◽  
Algorithm Analysis ◽  
Atmospheric Concentration ◽  
Sources Of Pollution ◽  
Hourly Data ◽  
The City

Abstract The sources of pollution in Tsakane township, which is situated within the City of Ekurhuleni in the province of Gauteng, South Africa, are investigated in this paper. The City of Ekurhuleni has the most industrial activities reported on South Africa's National Atmospheric Emission Inventory System (NAEIS), accounting for 40% of all listed activities in the country. The problem of suburban air pollution in South Africa is mainly associated with dense low-income areas like townships. The aim of this paper was to investigate atmospheric concentration correlation parameters, emissions roses, and probability modelling functions in order to analyse and classify significant emission sources affecting the township. Sulfur dioxide, nitrogen dioxide, ozone, and PM10 were the focus of the investigation. The probability functions for identifying and characterizing unknown or hidden sources of pollution were developed using hourly data. Furthermore, K-clustering algorithm analysis technique was used to provide graphical context for sources. PM10, ozone, sulfur dioxide, and nitrogen dioxide have all been identified as having directional pollution sources that are problematic and the results provide baseline data for a detailed understanding of current emission levels and possible sources.

scholarly journals Assessment of the impact of air pollution by heat power plant emissions on the health of the population of Novokuznetsk

2019 ◽  
pp. 348-352
Author(s):  
R. A. Golikov ◽  
V. V. Kislitsyna ◽  
D. V. Surzhikov ◽  
A. M. Oleshchenko ◽  
M. A. Mukasheva
Keyword(s):  
Public Health ◽  
Air Pollution ◽  
Power Plant ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Hexavalent Chromium ◽  
Coal Ash ◽  
Carcinogenic Risk ◽  
The Impact ◽  
The City

Introduction. Th e study of the infl uence of air pollution on the health of the population of industrial cities is an urgent task of preventive medicine.The purpose of the study— assessment of risk for population health of the city of Novokuznetsk, associated with the receipt in atmospheric air of polluting substances from SC «Kuznetsk TPP».Materials and methods.The paper presents the results of risk assessment for the health of the population of Novokuznetsk from the impact of atmospheric emissions of coal thermal power plant. Risks were calculated in accordance with the «Guidelines for the assessment of public health risks from exposure to chemicals that pollute the environment».Results.It was found that sulfur dioxide, coal ash, nitrogen dioxide had the largest share in the index of non-carcinogenic hazard of emissions. Th e maximum hazard index of carcinogenic substances was detected in hexavalent chromium. Th e greatest risk of immediate action, manifested in the development of refl ex reactions, was detected at two points of exposure to concentrations; it was determined by the infl uence of coal ash. In the formation of the risk of chronic intoxication, coal ash, sulfur dioxide, nitrogen dioxide, nitrogen oxide had the greatest impact; the greatest risk was detected at three points. Th e hazard coeffi  cients of the concentrations ranged from 2.04×10–4 to 6.723. The maximum index of danger equal to 29.31, corresponded to the residential district of Lenin square. Th e highest levels of carcinogenic risk identifi ed at three points were determined by exposure to hexavalent chromium.Conclusion.Th e work identifi ed environmentally disadvantaged neighborhoods of the city. It is shown that the main contribution to the formation of non-carcinogenic risk of health disorders of the city’s population is made by nitric oxide and nitrogen dioxide, coal ash, sulfur dioxide. Th e main carcinogen is hexavalent chromium. Th e total values of risks expressed in the multiplicities of excess of acceptable risk, for most points exceed 1, indicating a signifi cant impact of emissions on the health of the population. A set of atmospheric protection measures aimed at reducing risks to public health is recommended. 

Economies and employment in growing and declining urban peripheries in South Africa

2021 ◽  
Vol 36 (5) ◽  
pp. 391-410
Author(s):  
Alison Todes ◽  
Jennifer Houghton
Keyword(s):  
South Africa ◽  
Case Studies ◽  
Low Income ◽  
Economic Change ◽  
New Developments ◽  
Urban Edge ◽  
Industrial Decline ◽  
Urban Periphery ◽  
The City ◽  
Eastern Edge

Urban peripheral growth takes diverse forms, including the development of new economic centralities, raising questions about access to employment for residents, especially in contexts where unemployment is high and economies are shifting towards more skilled and service-related employment. This article explores two case studies of residents’ experience of access to employment close to economic centralities on the urban edge in South Africa: the growing northern eThekwini area (Durban), which has developed major retail and office complexes since the 1990s and more recently a new airport and industrial spaces, and a declining industrial decentralisation point established in the 1980s on the eastern edge of the City of Tshwane (Pretoria). It shows the severe impact of industrial decline in the Tshwane case, but while unemployment is less in northern eThekwini, access to employment for low-income residents in these areas is still very limited and constrained. Experiences are however differentiated, suggesting a complexity of outcomes. The cases point to the vulnerability of these economic centralities to economic change and the limits of new developments on the urban periphery to addressing unemployment. These findings have implications for the current advocacy of ‘new cities’ in economic contexts such as South Africa.

Quantification of Nitrogen Dioxide and Sulfur Dioxide emissions from Bucharest using a mobile-DOAS setup

2020 ◽  
Author(s):  
Sebastian Iancu
Keyword(s):  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Human Life ◽  
Scattered Light ◽  
Fine Tuning ◽  
Atmospheric Composition ◽  
Optical Absorption Spectroscopy ◽  
Vertical Column ◽  
Airborne Measurements ◽  
The City

<p>Atmospheric pollution has a well-known impact on the human life, thus observing the emissions of trace gases is an important part of monitoring the atmospheric composition. This paper aims to determine the vertical column densities (VCDs) of Nitrogen Dioxide (NO<sub>2</sub>) and Sulfur Dioxide (SO<sub>2</sub>). These quantities will be used to calculate emissions of these pollutants quantified using a ground based mobile remote sensing technique that relies on scattered light DOAS (Differential Optical Absorption Spectroscopy) measurements. This method will be implemented using the SWING (Small Whiskbroom Imager for atmospheric compositioN monitorinG). The instrument is designed to perform airborne measurements, but for the purpose of this paper it was adapted for ground-based use by the National Institute for Aerospace Research (INCAS) in Bucharest, Romania. The source aimed to be quantified is the city of Bucharest, specifically the total emissions generated by the traffic and industry within the city. The measurements will be performed during the Spring of 2020 between February and April. The experimental setup consists of the SWING that will be mounted on the roof of a car, which allows to perform measurements along the ring road of Bucharest. There will be presented results from several days of measurements from a total of 150 hours of driving in terms of differential slant column densities (DSCDs), vertical column densities (VCDs) and quantified emissions of NO­<sub>2</sub> and SO<sub>2</sub>. This study will also be used for the fine tuning of the SWING operational parameters for use on UAV platforms in future measurement campaigns.</p>

scholarly journals Fig. 7. Maps of census tracts in the City of Johannesburg district municipality. Census tracts are colored by relative street greenness (A, D), income (B) and race (C, E). The height of census tracts in D and E represents income. Empty space within the city represents non-residential areas that were not accounted for in the 2011 census.

2021 ◽  
Author(s):  
Zander S Venter ◽  
Charlie M. Shackleton ◽  
Francini Van Staden ◽  
Odirile Sebogoe ◽  
Vanessa A Masterson
Keyword(s):  
South Africa ◽  
Low Income ◽  
Green Infrastructure ◽  
Empty Space ◽  
Racial Groups ◽  
Residential Areas ◽  
Public And Private ◽  
Census Tracts ◽  
Urban South ◽  
The City

<p>Urban green infrastructure provides ecosystem services that are essential to human wellbeing. A dearth of national-scale assessments in the Global South has precluded the ability to explore how political regimes, such as the forced racial segregation in South Africa during and after Apartheid, have influenced the extent of and access to green infrastructure over time. We investigate whether there are disparities in green infrastructure distributions across race and income geographies in urban South Africa. Using open-source satellite imagery and geographic information, along with national census statistics, we find that public and private green infrastructure is more abundant, accessible, greener and more treed in high-income relative to low-income areas, and in areas where previously advantaged racial groups (i.e. White citizens) reside.</p><br>

scholarly journals A Preliminary Assessment of Dispersion Level of SO2in Fars Industrial Region, South of Iran, by GIS

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mansooreh Dehghani ◽  
Mohammad Mehdi Taghizadeh ◽  
Hassan Hashemi ◽  
Ebrahim Rastgoo
Keyword(s):  
Air Pollution ◽  
Sulfur Dioxide ◽  
Urban Areas ◽  
Oil Refinery ◽  
Industrial Park ◽  
Sources Of Pollution ◽  
Sulfur Dioxide Concentration ◽  
Local Air Pollution ◽  
Standard Limit ◽  
The City

The city of Zarghan is located 25 km northeast of Shiraz, southern Iran. Zarghan is affected by numerous pollution sources such as oil refinery, an industrial park, and Shiraz-Tehran highway. The numerous contaminating sources around Zarghan can cause serious local air pollution. Sulfur dioxide gas is an important index of air pollution in cities. Therefore, in order to control and manage Zarghan air quality, it is important to monitor sulfur dioxide concentration in the surrounding area. It is also essential to know about the contribution level of other sources of pollution as well as dispersion radius of pollutants in the area. In this study, the concentration of sulfur dioxide was measured by passive sampling at 10 different stations. These values were interpolated in other parts of the city using ArcGIS software. The results of sampling showed that the concentration of the gas was 60 µgm−3around oil refinery. The level was 19 µgm−3in region located about 3 km from the oil refinery. It was also demonstrated that the gas concentration was not higher than the standard limit within residential area. On the other hand, the role of the local highway and industrial park was not significant in contaminating air in urban areas.

scholarly journals Fig. 6. Maps of census tracts in the City of Cape Town district municipality. Census tracts are coloured by relative street greenness (A, D), income (B) and race (C, E). The height of census tracts in D and E represents income. Empty space within the city represents non-residential areas that were not accounted for in the 2011 census.

2021 ◽  
Author(s):  
Zander S Venter ◽  
Charlie M. Shackleton ◽  
Francini Van Staden ◽  
Odirile Sebogoe ◽  
Vanessa A Masterson
Keyword(s):  
South Africa ◽  
Low Income ◽  
Green Infrastructure ◽  
Empty Space ◽  
Racial Groups ◽  
Residential Areas ◽  
Public And Private ◽  
Census Tracts ◽  
Urban South ◽  
The City

<p>Urban green infrastructure provides ecosystem services that are essential to human wellbeing. A dearth of national-scale assessments in the Global South has precluded the ability to explore how political regimes, such as the forced racial segregation in South Africa during and after Apartheid, have influenced the extent of and access to green infrastructure over time. We investigate whether there are disparities in green infrastructure distributions across race and income geographies in urban South Africa. Using open-source satellite imagery and geographic information, along with national census statistics, we find that public and private green infrastructure is more abundant, accessible, greener and more treed in high-income relative to low-income areas, and in areas where previously advantaged racial groups (i.e. White citizens) reside.</p>

scholarly journals Fig. 7. Maps of census tracts in the City of Johannesburg district municipality. Census tracts are colored by relative street greenness (A, D), income (B) and race (C, E). The height of census tracts in D and E represents income. Empty space within the city represents non-residential areas that were not accounted for in the 2011 census.

2021 ◽  
Author(s):  
Zander S Venter ◽  
Charlie M. Shackleton ◽  
Francini Van Staden ◽  
Odirile Sebogoe ◽  
Vanessa A Masterson
Keyword(s):  
South Africa ◽  
Low Income ◽  
Green Infrastructure ◽  
Empty Space ◽  
Racial Groups ◽  
Residential Areas ◽  
Public And Private ◽  
Census Tracts ◽  
Urban South ◽  
The City

<p>Urban green infrastructure provides ecosystem services that are essential to human wellbeing. A dearth of national-scale assessments in the Global South has precluded the ability to explore how political regimes, such as the forced racial segregation in South Africa during and after Apartheid, have influenced the extent of and access to green infrastructure over time. We investigate whether there are disparities in green infrastructure distributions across race and income geographies in urban South Africa. Using open-source satellite imagery and geographic information, along with national census statistics, we find that public and private green infrastructure is more abundant, accessible, greener and more treed in high-income relative to low-income areas, and in areas where previously advantaged racial groups (i.e. White citizens) reside.</p><br>

scholarly journals Fig. 6. Maps of census tracts in the City of Cape Town district municipality. Census tracts are coloured by relative street greenness (A, D), income (B) and race (C, E). The height of census tracts in D and E represents income. Empty space within the city represents non-residential areas that were not accounted for in the 2011 census.

2021 ◽  
Author(s):  
Zander S Venter ◽  
Charlie M. Shackleton ◽  
Francini Van Staden ◽  
Odirile Sebogoe ◽  
Vanessa A Masterson
Keyword(s):  
South Africa ◽  
Low Income ◽  
Green Infrastructure ◽  
Empty Space ◽  
Racial Groups ◽  
Residential Areas ◽  
Public And Private ◽  
Census Tracts ◽  
Urban South ◽  
The City

<p>Urban green infrastructure provides ecosystem services that are essential to human wellbeing. A dearth of national-scale assessments in the Global South has precluded the ability to explore how political regimes, such as the forced racial segregation in South Africa during and after Apartheid, have influenced the extent of and access to green infrastructure over time. We investigate whether there are disparities in green infrastructure distributions across race and income geographies in urban South Africa. Using open-source satellite imagery and geographic information, along with national census statistics, we find that public and private green infrastructure is more abundant, accessible, greener and more treed in high-income relative to low-income areas, and in areas where previously advantaged racial groups (i.e. White citizens) reside.</p>

Transnational Habitus and Sociability in the City: Zimbabwean Migrants’ Experiences in Johannesburg, South Africa

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Khangelani Moyo
Keyword(s):  
South Africa ◽  
Urban Space ◽  
Field Research ◽  
The South ◽  
Economic Networks ◽  
Social Field ◽  
Transnational Migrants ◽  
Telephone Calls ◽  
The City

Drawing on field research and a survey of 150 Zimbabwean migrants in Johannesburg, this paper explores the dimensions of migrants’ transnational experiences in the urban space. I discuss the use of communication platforms such as WhatsApp and Facebook as well as other means such as telephone calls in fostering the embedding of transnational migrants within both the Johannesburg and the Zimbabwean socio-economic environments. I engage this migrant-embedding using Bourdieusian concepts of “transnational habitus” and “transnational social field,” which are migration specific variations of Bourdieu’s original concepts of “habitus” and “social field.” In deploying these Bourdieusian conceptual tools, I observe that the dynamics of South–South migration as observed in the Zimbabwean migrants are different to those in the South–North migration streams and it is important to move away from using the same lens in interpreting different realities. For Johannesburg-based migrants to operate within the socio-economic networks produced in South Africa and in Zimbabwe, they need to actively acquire a transnational habitus. I argue that migrants’ cultivation of networks in Johannesburg is instrumental, purposive, and geared towards achieving specific and immediate goals, and latently leads to the development and sustenance of flexible forms of permanency in the transnational urban space.

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