MSc., Faculty of Science, University of the Witwatersrand, 2011 / Riparian zones harbour different species pools from the surrounding landscape and are thus important to biodiversity conservation. However, riparian zones are highly variable. Network characteristics, morphology, flow-sediment interactions, biophysical connectivity and biological characteristics all vary along the length of a river. It could therefore be expected that the biodiversity characteristics of different riparian zones may also be variable. To investigate this, this study quantified compositional and structural diversity in 1st, 2nd, 4th, 5th, and 7th stream order rivers in south-western Kruger National Park (KNP). A suite of measures, chosen to encompass the variety, balance, and disparity properties of diversity, was used to quantify woody vegetation and bird compositional and structural diversity within each stream order. Woody plant species richness and species diversity was highest in the 7th order river and similar in the 1st through 5th order rivers. Likewise the woody vegetation community composition of the 7th order river was distinct from those in the other stream order rivers. Bird species diversity was similar in all five stream orders considered. Bird community composition of the 7th order river was distinct from the bird community composition of the 4th and 5th order rivers, which in turn was distinct from the bird community composition of the 2nd and 1st order rivers. Woody vegetation height, canopy width and diameter diversity tended to be highest in the 4th and 5th order rivers, while number of stem (NoS) diversity was generally highest in the 1st order rivers and decreased along the stream order sequence to the 7th order river. Bird body mass diversity was highest in the middle of the stream order sequence, while bird wing length/body length (WL/BL) and leg length diversity was similar along the entire stream order sequence. Overall, a variety of patterns of change in biodiversity along the stream order sequence were observed The lack of a consistent pattern along the stream order sequence among the different elements of compositional and structural diversity illustrates that no single measure can properly characterise the biodiversity of an area, and thus researchers and managers need to be explicit about which aspect of biodiversity they are aiming to study/conserve. Additionally, the unique combination of biodiversity found in each of the stream orders illustrates that each contributes importantly to overall regional biodiversity, and thus there is need to consider the role of entire drainage networks in the landscape, rather than simply focusing on perennial rivers. Finally, this study illustrates the need to consider the heterogeneous nature of biodiversity itself.

Thesis (MScEng)--Stellenbosch University, 2013. / ENGLISH ABSTRACT: Since the construction of the causeway and the jetty during the early 1970’s in Saldanha Bay, various alterations to the coastline in the area of the Langebaan Lagoon mouth were observed. These alterations include the erosion of Langebaan Beach located near the town of Langebaan. An investigation was undertaken to identify the possible impact these structures had on the hydrodynamics and sediment transport of the Saldanha Bay and Langebaan Lagoon systems, focusing on the entrance to the Langebaan Lagoon. A two-dimensional numerical model was implemented for this investigation. The outdated information available for the generation of a bathymetry, which indicated the conditions prior to the erosion of Langebaan Beach, complicated the calibration process. However, calibration of the numerical model was acceptable. Due to the bathymetry not providing an indication on the current situation at the Langebaan Lagoon mouth, the results from the numerical model were approached with caution, providing an overview of the hydrodynamics present in Saldanha Bay and Langebaan Lagoon and would be able to broaden the understanding of the impact the causeway and jetty had on the hydrodynamics and sediment transport of Saldanha Bay and Langebaan Lagoon. Results provided by the sediment transport model only provide an indication on the effect tidal variations and wind forcing have on the bay and lagoon and not realistic total sediment transport rates due to the omission of wave action during the modelling process. Results from the numerical model, based on tidal oscillations and wind forcing only, have indicated that no major impact on the hydrodynamics and sediment transport were experienced due to the construction of the causeway and the jetty. During the investigation of the impact of various extreme water level and extreme wind conditions, it has been observed that a 1 in 100 year wind velocity across the longest fetch towards Langebaan Beach resulted in the greatest velocities prior to the construction of the causeway and the jetty, and after the construction of the causeway and the jetty tidal storms, or storm surge, generated the greatest velocities and thus the most sediment transport in the main channels of the mouth of the Langebaan Lagoon. From this investigation it was recommended that future studies would require an updated survey of the area, to ensure accurate modelling of the conditions as experienced during field surveys. Further recommendations on the investigation of sediment transport were the inclusion of wave action to provide realistic results. Wave action is a fundamental part of sediment transport along the coastline. / AFRIKAANSE OPSOMMING: Sedert die konstruksie van die breekwater en die kaai gedurende die vroeg 1970’s in Saldanhbaai, is verskeie veranderings aan die kuslyn in die gebied van die Langebaan strandmeer mond waargeneem. Hierdie veranderinge sluit in die erodering van Langebaan Strand, geleë naby die dorp van Langebaan. 'n Ondersoek is onderneem om die moontlike impak van die bogenoemde strukture op die hidrodinamika en sedimentvervoer van die Saldanhabaai en die Langebaan strandmeer stelsels, veral die strandmeer se kanale, met die fokus op die ingang na die Langebaan strandmeer te ondersoek. 'n Twee-dimensionele numeriese model is gebruik vir hierdie ondersoek. Die verouderde inligting van die seebodem wat beskikbaar was vir die opwekking van die numeriese model het die kalibrasieproses bemoeilik. Alhoewel hierdie proses bemoeilik is kon ‘n aanvaarbare kalibrasie bereik word. Aangesien die gemodelleerde area en die werklike area nie ooreengestem het nie is resultate van die numeriese model omsigtig benader en die resultate geskik gevind om die kennis oor die moontlike impak wat die breekwater en die kaai op die hidrodinamika en sedimentvervoer van Saldanhabaai en die Langebaan strandmeer het, te verbreed. Resultate uit die sedimentvervoer model verskaf slegs ‘n aanduiding van die sedimentvervoer wat deur gety veranderings en wind gegenereer word. Werklike sediment vervoer sal die effect van golfaksie ook in ag moet neem, wat in hierdie studie uitgesluit is. Golfaksie is van kardinale belang by sediment vervoer langs ‘n kuslyn. Resultate van die numeriese model, gebaseer op gety en wind alleen, het aangedui dat geen groot impak op die hidrodinamika en sedimentvervoer as gevolg van die konstruksie van die breekwater en die kaai in Saldanhabaai ervaar word nie. Gedurende die ondersoek van die impak van verskeie ekstreme watervlak en uiterste windtoestande, is dit opgemerk dat 'n 1 in 100 jaar windsnelheid oor die langste stryklengte na Langebaan Strand gelei het tot die grootste vloei snelhede in die hoofkanale voor die konstruksie van die breekwater en die kaai. Na die konstruksie van die breekwater en die kaai is gevind dat gety storms die grootste snelhede en dus ook die meeste sedimentvervoer gegenereer het by Langebaan Strand. Uit hierdie ondersoek is dit aanbeveel dat toekomstige studies opgedateerde opmetings van die gebied moet uitvoer wat akkurate modellering, gebaseer op die toestande soos in die veld, sal verseker. Verdere aanbevelings oor die ondersoek van sediment vervoer is die modellering van .golfaksie wat van kardinale belang is in sediment vervoer langs ‘n kuslyn en dus meer realistiese resultate sal lewer.

Thesis (MTech (Applied Sciences))--Cape Peninsula University of Technology, 2007 / Changes in plant specIes richness and diversity were investigated in Rocherpan Nature Reserve across a fence (or old fence line) separating 34 years of conservation management, conservation management for 11 years south and north, natural veld grazed by cattle and goats, natural veld grazed by sheep, and strip-ploughed veld grazed by sheep. Vegetation surveys were conducted in September 2001. The modified 20 m x 50 m Whittaker plot design with its attractive features of long-thin plots and the original Whittaker plot design were used. Number of species (as richness data) and the numbers of individual recordings per species per land use (as abundance data) were used in calculations in the 20 m x 50 m (1000 m2 ) plots. The species richness index showed significantly smaller numbers of species in the conservation management 11 years south land. The results also showed an increase in species numbers under the grazing land use systems. The data from the comparative study of the five different species diversity indices showed no significant differences. As a result, the Shannon-Wiener index was selected for further assessing the species diversity index and the species diversity significance of different land uses in the West Coast Strandveld. In this particular study, the species that showed an increase in vegetation cover in response to grazing land use regimes were Hemimeris racemosa (annual herb) and Ehrharta brevifolia (annual grass).

The media has had a significant impact on spreading environmental awareness internationally. The issues covered in the media can be seen as both representative of and an influence upon the heterogeneous public. This paper describes the environmental reporting in the South African provincial newspaper, the Natal Witness, and considers the results to both represent and influence South African environmental ideology. Environmental reporting in South Africa has been criticised for its focus on 'green' environmental issues. This criticism is rooted in the traditionally elite nature of both the media and environmentalists. However, both the media and environmentalists have been noted to be undergoing transformation. This research tests the veracity of assertions that environmental reporting is elitist, and has found that the assertions accurately describe reporting in the Witness. 'Green' themes are most commonly found, and sources and actors tend to be white and men. However, a broad range of discourses were noted, showing that the paper gives voice to a range of ideologies. These results hopefully will make a positive contribution to the environmental field by initiating debate, further studies, and reflection on the part of environmentalists, journalists, and academics on the relationship between the media and the South African environment. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2004.

Thesis (MA (History))--University of Stellenbosch, 2009. / Although the environment is of obvious and primary importance in agriculture, the historical relationship between agriculture and the environment has not been widely researched. A socio-environmental paradigm provides a useful, inter-disciplinary framework for writing history. It takes into account the fact that ‘natural disasters’ are not merely happening to farmers, governments and communities, subsequently disturbing economic growth-patterns and reverberating amongst policy-makers and politicians. The relationship is much more reciprocal. The environment is not perceived as a player that sometimes disrupts the historical narrative, forcing the plot in a certain direction before returning to the wings. It is rather percieved as an agent within agricultural history. The social-cultural as well as material relationships between people (in this case white farmers), state and the environment are explored as an ecosystem. The thesis focuses on a time period after the First World War to just after the Second World War (c.1920 – c.1950). It asks questions: whom and what has informed the ideas of the state with regards to agriculture and to what extent did it filtered through to the farming communities themselves? The motives behind these approaches are explored. The thesis will also look at how officials translated the policies, legislation and education into what was perceived as functional for the farmers and effective for the environment, tracing how it changed over time. The shifting perception of the farmers about the environment and themselves, and the role of the state played in ‘management’ of the environment are analysed, using press correspondence, marketing campaigns and popular texts. Two themes that garnered much debate in the agricultural sector at the state, farmer and environment interface, include the ‘disasters’ of soil erosion and locust plagues. On the level of ‘scientific agriculture,’ the shift from Europe as a point of reference to the United States is discussed. This is done against the backdrop of South Africa’s semi-arid landscape and how farmers came to grips with this ostensibly hostile environment in an era where mechanisation and urbanisation are thought to have radically altered the conceptualisation of the natural environment.

The arid interior of South Africa lacks long, continuous and well-dated climate and environmental proxy records that can be compared with cultural sequences and with broader global climate records. This thesis develops the first substantial terrestrial environmental sequence for the interior of southern Africa at the site of Wonderwerk Cave, spanning two million years of prehistory. Changes in vegetation and humidity over time were investigated by means of carbon and oxygen stable isotope analysis on fossil herbivore enamel and ostrich eggshell, creating two independent proxy datasets. The Holocene record was used as a baseline for comparing the Pleistocene sequence, but required chronological tightening. Therefore, nine new radiocarbon dates were obtained, and calibrated and modelled with existing dates to provide a firmer chronology. The ostrich eggshell isotope record suggests arid but variable conditions, with distinct phases of increased humidity in the Early Pleistocene and mid-Holocene. Enamel stable isotope results show clear differences in local resource availability between the Early and Mid-Pleistocene, and then between the Pleistocene and Holocene, with an overall trend of increasing aridity. In particular, the onset of dietary specialisation in grazers at 0.8Ma is linked to expanding C4 grasslands. Aridity was not the driver behind the increase in C4 grasses, but changing pCO2 levels at the Mid Pleistocene transition were identified as a possible key factor. The presence of C3 and C4 grasses in the Early Pleistocene, when compared to the domination of C4 grasses today, was fostered by reduced rainfall seasonality. Regional independent developments have to be considered, as other regions in South and East Africa show C4 dominated diets in herbivores at earlier times than at Wonderwerk Cave. In the Holocene, higher temporal resolution indicates phases of environmental change coinciding with changes in the cultural record.

From Summary: This is a geographical study of land use in the Eastern Cape Province. The land use pattern, although related closely to the features of the natural environment, is perhaps even more closely related to the spatial variations of the man-made environment, particularly to the disposition of the different racial groups with their different cultures and economies, and to the kaleidoscopic character of the settlement pattern.

Thesis (MSc) -- University of Stellenbosch, 2004. / ENGLISH ABSTRACT: This thesis focuses on the effects of vegetation resting on biodiversity and community dynamics at Rocherpan Nature Reserve (320 36'S, 180 18'E) in the semi-arid coastal strip of the Succulent Karoo known as Strandveld. As a whole, the Succulent Karoo has an extraordinary high level of phyto diversity with high levels of endemism. This is particularly true for succulent shrubs belonging to the groups Mesembryanthemaceae, Crassulaceae and Asteraceae. The thesis begins with an investigation into effects that vegetation resting has on plant diversity. The aim was to determine if resting affected biodiversity levels and if so, which plant groups are affected and why. Through a numerical approach, it was determined that with resting overall species richness remained the same. However, different plant life forms responded to resting differently. With increased resting, abundance of succulent shrubs decreased, while richness of annuals increased. The second aspect under investigation was to determine how resting the vegetation affected community dynamics. The aim was to understand how vegetation structure and interspecific associations changed with resting and to apply these findings to known community models. Through an autocorrelation approach, it was found that horizontal patterning of long-lived woody species, that formed distinctive vegetation clumps, did not change with resting, while differences were found in woody matrix species and succulent species. These changes in structure were investigated further through a study on the demography of specific species. Demography of woody species associated with vegetation clumps did not change with vegetation resting, while significant changes were observed for woody matrix species and succulent species. In longer rested vegetation, woody matrix species showed a greater range in size class distribution (i.e. had both very large and smaller plants) with the tendency towards larger plant sizes. Succulents on the other hand, had a smaller range in size class distribution with a tendency towards larger plants. For all species investigated there were low seedlings counts. It was concluded that succulent shrub populations were 'mature' and continued resting could result in local extinction of some species due to the lack of regeneration. The overall lack of seedlings was attributed to a saturated establishment environment. Implications for conservation management were discussed. / AFRIKAANSE OPSOMMING: Hierdie tesis fokus op die gevolge van plantegroeirus op biodiversiteit en gemeenskapsdinamika by die Roeherpan Natuurreservaat (320 36'S, 180 18"0) in die halfdor kusstrook van die Sukkulente Karoo, bekend as die Sandveld. In die geheel gesien het die Sukkulente Karoo 'n buitengewone hoë vlak plantdiversiteit met hoë vlakke endemie. Dit is veral waar vir sukkulente struike wat tot die groepe Mesembryanthemaceae, Crassulaceae en Asteraceae behoort. Hierdie tesis ondersoek eerstens die gevolge wat plantegroeirus op plantdiversiteit het. Die doel was om te bepaal of rus die biodiversiteitsvlakke beïnvloed het en indien wel, watter plantgroepe en waarom. Deur middel van 'n numeriese benadering is bepaal dat die algehele diversiteit, numeries gesproke, met plantegroeirus dieselfde gebly het. Verskillende plantlewensvorme het egter verskillend gereageer. Met toenemende rus het die diversiteit van sukkulente struike afgeneem, terwyl die diversiteit van jaarplante verhoog het. Die tweede aspek wat ondersoek is, was om te bepaal hoe die plantegroeirus die dinamika van die omgewingsgemeenskap beïnvloed het. Die doel was om te verstaan hoe die struktuur van die plantegroei en die interspesifieke assosiasies verander het met rus en om dan hierdie bevindinge toe te pas op bekende gemeenskapsmodelle. Deur middel van 'n outokorrelasiebenadering is gevind dat die horisontale patrone van meerjarige houtagtige spesies wat in duidelik-uitkenbare plantegroeigroeperings voorkom, nie met rus verander het nie. Veranderinge is egter wel in die houtagtige matriksspesies en die sukkulente spesies waargeneem. Hierdie veranderinge in struktuur is verder ondersoek deur 'n studie te maak van die demografie van spesifieke spesies. Daar is gevind dat die demografie van houtagtige spesies geassosieer met plantegroeigroeperings nie met plantegroeirus verander het nie, maar beduidende veranderinge is waargeneem in die geval van houtagtige matriksspesies en sukkulente spesies. By plantegroei wat langer gerus het, het die houtagtige matriksspesies 'n wyer verspreiding in klasgroottes vertoon (d.i. daar was baie groot plante én kleiner plante) met 'n gemiddelde afname in plantgrootte. Sukkulente, aan die ander kant, het 'n kleiner verspreiding in klasgroottes vertoon met 'n neiging tot groter plante. Vir al die spesies wat ondersoek is, was daar lae saailingtellings. As gevolg van die "volwassenheid" van die populasies van sukkulente struike, sou voortdurende rus, weens die gebrek aan regenerasie, kon lei tot die plaaslike uitwissing van sommige spesies. Die algemene gebrek aan saailinge is toegeskryf aan die versadigde vestigingsomgewing. Die implikasies VIr natuurbewaringsbestuur word bespreek. v

Thesis (MPhil)--Stellenbosch University, 2011. / ENGLISH ABSTRACT: Sustainable development has gained great interest at global, national and local community levels. For instance, governments, civil societies, the commercial sector as well as local communities have responded to the agreed framework of UNCED known as Agenda 21, developed at the „Earth Summit‟ held at Rio de Janeiro in 1992, inter alia through the development of indicators aimed at monitoring and evaluating the achievement of sustainable development. As a result, different tools to measure the level of sustainability have been developed and applied in many cities globally. These include different types of indicators, namely environmental, social, and economic performance monitoring indicators, as well as combined indices. Since cities are dynamic complex open systems with interrelated social, economic and environmental systems, and sustainable development cannot be absolutely achieved, integrated sustainable development indicators that concurrently address social, economic and environmental dimensions are crucial to aid in monitoring sustainable development particularly in any given urban system. This study gives an overview of these indicators and indices. The South Africa government has acknowledged in both its National Framework for Sustainable Development of September 2006 and the Draft National Strategy for Sustainable Development and Action Plan of May 2010 that like other cities globally, cities in this country face similar challenges particularly due to urbanisation. In this study, the focus is on evaluating the sustainability challenges of the City of Cape Town and the role sustainability indicators could play in helping to achieve sustainable development objectives. This is supported by a review of the so called „sustainable cities‟ and in particular how the Cities of Seattle (USA), Santa Monica (USA) and Curitiba (Brazil) have tried to address urban challenges. To meet the study objective of recommending the type and a process of developing indicators that will aid in improving sustainability in the City of Cape Town, selected indicators and indexes developed globally, nationally and for other cities are critically reviewed. Selected policies, plans and indicators developed by the South African national government, the Western Cape provincial government, and the City of Cape Town are reviewed. The review aims at investigating whether the existing policies and indicators were useful in addressing sustainability challenges particularly in the City of Cape Town. The review focuses on the policy objectives to assess whether the policies contradicted or were supportive of each other, the existence or lack thereof of gaps in the policies, and whether local communities and other stakeholders were involved in decision making processes. The findings suggests that although sustainable development is addressed in the policy documents of all three spheres of government in South Africa, the implementation has not yet been effective – and the City of Cape Town is no exception based on published reports such as the State of Cape Town Report. On the basis of the lessons derived from the success stories of cities like Seattle, Santa Monica, and Curitiba towards achieving sustainability, several recommendations are suggested to assist the City of Cape Town in developing, implementing, and reporting on sustainability indicators. / AFRIKAANSE OPSOMMING: Op internasionale, nasionale asook plaaslike gemeenskapsvlakke het volhoubare ontwikkeling groot belangstelling gelok. In reaksie op die ooreengekome raamwerk van UNCED, Agenda 21, ontwikkel by die “Earth Summit” (Rio de Janeiro, 1992), is aanwysers gemik op die monitering en implementering van volhoubare ontwikkeling deur regerings, burgerlike samelewings, die kommersiële sektor asook plaaslike gemeenskappe ontwikkel. Dit het gelei tot die ontwikkeling en implementering van verskillende instrumente vir die meet van volhoubaarheid in verskeie stede wêreldwyd. Hierdie instrumente sluit in verskillende aanwysers, ondermeer omgewings-, sosiale-, ekonomiese- en prestasie aanwysers asook gekombineerde indekse. Omdat stede dinamies komplekse ope sisteme met interafhanklike sosiale, ekonomiese en omgewingssisteme is, en volhoubare ontwikkeling nie absoluut bereikbaar is nie, is geintegreerde volhoubare ontwikkelings aanwysers wat sosiale, ekonomiese en omgewings dimensies gelyktydig aanspreek van kritieke belang in die monitering van volhoubare ontwikkeling, spesifiek in enige gegewe stedelike sisteem. In beide sy nasionale raamwerk vir volhoubare ontwikkeling (Julie 2008) en nasionale strategie vir volhoubare ontwikkeling en Aksie plan (weergawe van 20 Mei 2010) het die Suid Afrikaanse regering erken dat plaaslike stede, soos ander wêreldwyd, dieselfde uitdagings in die gesig staar veral as gevolg van verstedeliking. Die fokus van hierdie studie was die evaluering van die volhoubaarheids-uitdagings van die Stad Kaapstad en die moontlike rol wat volhoubaarheids-aanwysers kan speel in ʼn poging om volhoubare ontwikkelings doelwitte te bereik. Hierdie word ondersteun deur ʼn oorsig van die sogenaamde “volhoubare stede” en spesifiek hoe stede soos Seattle (VSA), Santa Monica (VSA), en Curitiba (Brasilië) stedelike uitdagings probeer aanspreek het. Ten einde die studie doelwit aangaande die aanbeveling van die ontwikkelingsproses van aanwysers en indekse vir die verbetering van volhoubaarheid in die Stad Kaapstad te bereik, is verskeie internasionale, nasionale sowel as stedelike volhoubare ontwikkelings indekse krities geëvalueer. Geselekteerde beleid, planne en aanwysers wat deur die Suid Afrikaanse Nasionale regering, die Wes Kaapse provinsiale regering en die Stad Kaapstad ontwikkel is, is ondersoek. Die doel van hierdie evaluasie was om vas te stel of bestaande beleid en aanwysers nuttig is, in die aanspreek van volhoubaarheids-uitdagings spesifiek in die Stad Kaapstad. Die fokus van die evaluasie was op beleidsdoelwitte ten einde te bepaal of: verskeie beleid teenstrydigheid toon of andersins ondersteunend is, die bestaan of gebrek aan leemtes in beleid en of plaaslike gemeenskappe en of ander belange groepe in die besluitnemingsproses betrokke is. Die bevindinge dui daarop dat alhoewel volhoubare ontwikkeling in beleidsdokumente van al drie sfere van die Suid Afrikaanse regering aangespreek word, die implementering daarvan nog nie so doeltreffend is nie - en gebaseer op gepubliseerde verslae soos die stand van Kaapstad, is die Stad van Kaapstad nie ʼn uitsondering nie. Na aanleiding van lesse geleer uit die sukses verhale van stede soos Seattle, Santa Monica en Curitiba in die bereiking van volhoubare ontwikkeling is verskeie aanbevelings gemaak om die Stad Kaapstad by te staan in die ontwikkeling, implementering, en rapportering van volhoubaarheids-aanwysers.

Thesis (MTech (Environmental Health))--Cape Peninsula University of Technology, 2019. / Background: A recent review on the effects of ambient air pollution on human health in sub-Saharan Africa, specifically calls for an urgent need for more epidemiological studies in developing countries due to a lack of data in these countries. Air pollution information on exposure is important for understanding and addressing its public health impact in developing countries. In many African countries, the spatial distribution of air pollutants has not been quantified even though air pollution is a global public health risk. The main goal of the study was to quantify and compare the seasonal spatial variation of household air pollution in the 4 Western Cape neighbourhoods. Methods: Weekly indoor and outdoor measurements of Particulate Matter (PM2.5), Sulphur dioxide (SO2), Ozone (O3), Carbon monoxide (CO) and Nitrogen dioxide (NO2) were conducted at 127 households in four informal settlement areas (Khayelitsha, Marconi-Beam, Masiphumulele and Oudtshoorn) during one month each in summer and winter. PM2.5 measurements were conducted using Mesa Labs GK2.05 (KTL) cyclone with the GilAir Plus Air Sampling Pump, Gases were measured using Passam passive samplers. Statistical analyses were performed using Stata V12. Simple linear regression was used to evaluate the relationship between continuous exposure levels and the respective predictor variables. These include distance to major roads, bus routes, open grills and waste burning sites. Results: The highest average weekly outdoor PM2.5 and NO2 concentrations for summer were recorded in Milnerton (8.76 µg/m3 and 16.32 µg/m3 respectively). However, the highest average concentrations during winter for PM2.5 were recorded in Oudtshoorn (PM2.5: 16.07 µg/m3), whilst the highest NO2, was recorded in Khayelitsha (NO2: 35.69 µg/m3). SO2 levels were consistently low during both seasons. Noordhoek generally recorded the lowest average levels for all pollutants. Winter average weekly concentrations were generally higher than the levels recorded in summer for all pollutants. In a sub-sample of indoor and outdoor measurements, the results were comparable for PM2.5, NO2 and CO. However, the results of Ozone (O3) showed relatively higher (~10 times) outdoor compared to indoor levels. Linear regression modelling results revealed that significant predictors of elevated exposure to PM2.5 were proximity to construction activities and open grills. Analysis demonstrated a clear dose-response relationship with distance, with open grills within 1000m associated with a 0.33 µg/m3 increase in PM2.5 to 6.77 µg/m3 at a distance of 25 meters. Results from the linear regression modelling revealed that significant predictors of exposure to NO2 were proximity to rapid transport bus stops, bus routes, taxi routes and major routes. Distance to rapid transport bus stops demonstrated an increase in NO2 between 0.09 µg/m3 (at 1km) to 2.16 µg/m3 (at 50m) during summer. A similar pattern was observed for taxi routes and bus routes displaying an increase of 6.26 μg/m3and 6.82 μg/m3 respectively within the proximity of 1000 meters. / MAUERBERGER Foundation Scholarship