Geography

Permanent URI for this communityhttps://hdl.handle.net/10413/6543

Browse

Now showing 1 - 20 of 271

A 40,000-year record of vegetation and fire history from the Tate Vondo region, Northeastern Southpansberg, South Africa.
(2014) Baboolal, Deeva Lata.; Finch, Jemma M.
Records from the Quaternary period are used to confirm possible inferred climatic changes, reveal the responses of species to these changes, and serve as an archive against which modern environmental dynamics can be assessed. Fueled by a need to understand current climatic changes, the call for palaeoclimatic research in the southern African subregion has become more compelling. In southern Africa, such research has been largely restricted to springs and swamps as the subregion lacks natural lakes, with some exception of a few coastal lakes such as Lake Sibaya and Lake Eteza. Due to the arid and semi-arid landscapes which prevail in southern Africa, there is a paucity of suitable sedimentary deposits in the region. The highly organic peat deposit of Mutale Wetland, situated in the Tate Vondo region of the northeastern Soutpansberg presents an ideal opportunity for conducting palaeoenvironmental research. The Mutale Wetland contains relatively old sediments dating back to >30,000 cal years BP, placing this record within the late Quaternary period. Palaeoenvironmental techniques including radiocarbon, pollen and charcoal analyses were applied to produce a palaeoenvironmental reconstruction for Tate Vondo. A 302 cm sedimentary core was extracted from the Mutale Wetland. Detailed analyses show that prior to ca. 34,000 cal yr BP, conditions were fairly warm and dry. This is inferred from a dominance of open grassland vegetation. An expansion of Podocarpus forests together with an increase in fynbos elements suggest a shift to cool, subhumid conditions during the LGM. Cooler conditions persisted until ca. 12,000 cal yr BP. Thereafter, a climatic amelioration was experienced. The appearance of low charcoal concentrations throughout the late Pleistocene suggests that fire was infrequent. Between ca. 4000 – 1500 cal yr BP, conditions became warmer and drier, inferred from the development of arid savanna vegetation. The sharp increase in charcoal after ca. 4000 cal yr BP, broadly coinciding with the arrival of the first agriculturalists in the area, has implications for the history of human occupation in the Soutpansberg rather than shifts in climate. The succession from savanna to fynbos vegetation together with expanded forests implies a return to cool and moist conditions from ca. 1500 – 400 cal yr BP. Arid savanna persists from ca. 400 to the present, implying warmer and drier conditions towards the present day. Furthermore, from ca. 400 cal yr BP, the pollen and charcoal record indicate that the majority of recent changes in vegetation have been driven by anthropogenic activity. This record has contributed to an improved understanding of late Quaternary changes in climate, vegetation history and human impact in the northeastern Soutpansberg.
A critical analysis of current approaches to SMME development and support within the eThekwini Municipal Area.
(2009) Chetty, Anneline.; Bob, Urmilla.
Small, Medium and Micro Enterprises (SMMEs) are considered to be the engines of growth of any economy. In the light of recent economic events and the recession that is surging rapidly across the globe, more and more attention is being focused on SMME development and support. Whilst there are a number of organisations (both public and private) which provide support to SMMEs within the eThekwini Municipality Area (EMA), the overall impacts of these initiatives on SMME growth and development is minimal and there is a dearth of studies that critically examine business support services for SMMEs which the public and private sectors provided. One of the major reasons for this minimal impact is the lack of communication and coordination between various service providers which often results in fragmentation and duplication of services. This study analyses the support measures offered to SMMEs not only from the perspective of the SMMEs themselves but also examines the perspectives of service providers from both the public and private sectors. This study is also placed within a multi-disciplinary conceptual framework which includes the political economy approach, neoliberalism, the public-private-sector debate and empowerment theories with specific reference to the South African context. This study is unique in that it analyses SMME development and support within the EMA from various perspectives within a single study. The objectives of this study were to investigate the awareness and experiences of SMMEs with regards to their support and development and also to critically examine the attitudes and perceptions of service providers (both public and private) towards SMME development and support. In addition, this study sought to assess the capacity of both the private and public sectors to provide effective support and development to SMMEs. An additional objective of this study was to determine the value placed on support measures by determining SMMEs’ willingness to pay for services provided, but more importantly to determine the attitudes of the public and private sectors towards the payment for services offered. Both qualitative and quantitative methods were adopted. In terms of the latter, quantitative surveys were conducted with 250 SMMEs who attended various fairs and conferences held across the EMA. Semi-structured interviews (qualitative approach) were conducted with representatives from the private and public sectors that provide support or services to the SMMEs in the EMA. In this regard, 53 representatives from the public sector and 50 from the private sector were interviewed. The analysis was undertaken thematically and, where relevant, findings pertaining to the different stakeholders interviewed were compared and discussed. Some of the key findings indicate that SMME respondents were more aware of local government and the services they provide than any other tier of government. Furthermore, SMME respondents within the study did not fully grasp the concept of Business Development Services (BDS) and the associated benefits for their business. SMMEs rely heavily on government to provide services free of charge. The main finding is that private sector service providers are better qualified, positioned and trained to provide BDS than the public sector whose main roles should be that of regulator, facilitator and promoter. Whilst government has been a strong proponent of SMME development and support since 1994, this study presents a strong case for the increased role of the private sector. In addition, this study also motivates that local government through their Municipalities can play a significant role in SMME development and support in partnership with the private sector.
Abandoning the Ark in Durban: development, displacement, resettlement and livelihood struggles.
(2021) Fitzgerald, Tara Jade.; Maharaj, Bridgemohan.
Forced removals, the theme of this thesis, through evictions, clean-up campaigns and development-induced displacement, results in the ‘hygienisation’ of public space and the ‘violent un-homing’ of vulnerable communities. The Ark Christian Ministries Church (ACMC) was established in 1982 in Durban’s notorious Point Precinct, offering shelter and rehabilitation opportunities for socially excluded and marginalised persons in the inner city. As the city forged ahead with the Point Waterfront Development mega-project and prepared to host the 2010 FIFA World Cup, the Ark was shut-down in 2004. Notwithstanding a spirited resistance, one hundred families were forced to relocate to Welbedacht East, 30km from the Point Precinct. The aim of this study is to examine the implications of Development-Induced-Displacement and Resettlement (DIDR) on the livelihoods of those displaced from the Ark homeless shelter in the Point Precinct in Durban, and their survival strategies after relocating to the urban edge in Welbedacht. Influenced by theories of displacement, social justice and human rights, this thesis analysed the displacement, resistance, relocation and livelihood struggles of the Ark dwellers. A mixed-method approach was adopted in this study, drawing from qualitative and quantitative techniques and information from documents. The study found that those displaced remained socially excluded and marginalised in Welbedacht and expressed a deep sense of detachment and hopelessness. Their lives were characterised by unemployment, poverty and social pathologies. The former Ark residents failed to restore their livelihood opportunities and remain in a constant state of precarity. The study identified a new form of displacement. ‘New-Place Displacement’ refers to the inability to adapt to the new environment or integrate with surrounding communities. Instead, the ‘Arkians’ remained in a constant state of alienation in Welbedacht.
Achieving local economic development through natural resource-based tourism in KwaZulu-Natal.
(2003) Trotter, Dayle Carey.; Hill, Trevor Raymond.
A number of development strategies and programmes are currently being explored in South Africa as a part of a renewed ihitiative to overcome the imbalances persisting from the apartheid era with respect to development, wealth, income and opportunity, and in order to address problems increasing unemployment brought on by the decline of traditional employment sectors. Local Economic Development (LED) is one such strategy that seeks to utilize local resources and skills in order to promote economic growth and create employment opportunities. Similarly, tourism, which has become one of the most critical forces shaping the world's economy, has been recognised as a potential growth alternative in South Africa, and is being increasingly implemented into LED strategies across the country. Although the studies that have identified the link between tourism and LED are increasing, it is clear that research on the topic remains limited. This research therefore contributes to the existing literature, and investigates how three localities in Kwazulu-Natal have identified the tourism potential of the locally available natural resources, and how different actors have embarked on tourism-based projects that have sought to achieve LED. A series of semi-structured interviews formed the principle research method and information was obtained over a period of a year from a number of key stakeholders and role-players in each case study. It was found that all three case studies have created employment opportunities and have empowered local communities through skills development and training. This research attempts to highlight the potential opportunities and limitations of the pursuit of natural resource-based tourism as a catalyst for local economic development, such that other localities that are seeking to adopt a similar approach may learn from these experiences.
Adventure travel and sustainable tourism development in Lesotho : the case of pony trekking.
(1999) Mohasi, Lieketseng.; Fincham, Robert John.; Grant, Linda.
Tourism in Lesotho reached a peak in the mid-1970's, based upon the opening of modern hotels and casinos in Maseru and the attraction of gambling. This was an activity which was not then available in the neighbouring country of the Republic of South Africa. Casinos became Lesotho's dominant tourist product. The legalising of gambling in South Africa increased competition in the casino market and Lesotho could therefore no longer capitalise on casinos. Furthermore, the casinos in the country were externally owned and controlled. This form of tourism was therefore not economically viable for the greater proportion of the host population because most of the revenue generated drained back to parent countries. As a result, the strategy for tourism development shifted to the development of natural environment, landscape and outdoor pursuits such as pony trekking. Pony trekking became popular in the late 1970's and has since become one of the most important tourist products of the country. In the 1980's community pony trekking associations were established. These pony trekking initiatives were identified as one development option that could provide economic opportunities for rural communities where few other opportunities exist. The purpose of this study is to examine whether pony trekking initiatives in Lesotho can yield maximum possible economic, social and environmental benefits for the present and future host communities. While investigating its potential to meet the needs of host communities for improved living standards, it also examines whether this tourist product satisfies the demands and expectations of visitors. The field work described in this dissertation was carried out in three pony trekking centres, namely: the government owned Basotho Pony Trekking Centre located at Molimo-Nthuse in the Maseru district; the privately owned Malealea Pony Trekking Centre at Malealea in the Mafeteng district; and the community owned- Khohlonts'o Pony Trekking Centre at III Bokong in the Thaba-Tseka district. This study has revealed that pony trekking activities provide substantial socio- economic opportunities for local communities along the trek routes and around the trekking centres, from the renting of overnight facilities and horses, the production and selling of crafts and tour guiding by local people. Furthermore, the majority of members of pony trekking associations surveyed revealed high support for the activity due to the economic benefits. It was also found that the demands of the majority of visitors are being met. They were satisfied with the facilities and services offered in these centres and regarded public reception as being good. Though pony trekking contributes to social upliftment of the host communities, it is found, however, that there are major drawbacks. The survey indicates that at present limited number of people are involved or participate in pony trekking associations. Not only that, but even communities that are directly involved in pony trekking associations do not have control of such initiatives. Further, the survey shows that there is insufficient community capacity building and lack of government involvement in funding in the investment in infrastructure. Finally, the potential to attract more visitors remains relatively untapped due to a lack of proper marketing strategies; a lack of integrated marketing efforts in promotional campaigns; and weak advertising of the product between the public and private sectors. On the basis of these findings suggestions are made for further improvement. These include, firstly, a need to launch education and awareness programmes on the important role that tourism can play in socio-economic development of the communities. Secondly, more opportunities for the local population and new areas for pony trekking development should be opened. Finally, stronger support, from both the government and private firms for the tourist industry is needed.
Aerosols and atmospheric circulation characteristics over Durban.
(2000) Rahman, Muhammad Ziaur.; Diab, Roseanne Denise.
The main objective of this study was to investigate the vertical distribution of aerosols over Durban in relation to the vertical stability structure and horizontal transport of air masses. The importance of aerosols in the region is well recognised and recently there have been many international experiments which have focused on aerosol distribution over the subcontinent. Durban is situated at the approximate centre of a giant plume that is known to transport aerosols and trace gases off the east coast of southern Africa and is therefore strategically located for an investigation of the vertical distribution of aerosols. The vertical distribution of aerosols over Durban was measured using a LIDAR (Light Detection And Ranging) system on selected cloud free days in 1997. Backward trajectory modelling was used at selected pressure (standard) levels to determine the origin and transport pathways of aerosols. Six case studies are presented in an attempt to gain insight into the relationship between the vertical distribution of aerosols and absolutely stable layers. The results of the study revealed that the occurrence of absolutely stable layers governs the vertical distribution of aerosols in the troposphere. An absolutely stable layer at ~5km (~500hPa) appears to be the most effective in capping and trapping aerosols in the atmosphere. Below 5km, the atmosphere was charcterised by marked stratification and relatively higher concentration of aerosols. Above 5km, the concentrations were much lower, but generally increased slightly with height. Low aerosol concentrations are observed during post-frontal situations and relatively higher concentrations during anticyclonic conditions. The background to the problem and the objectives of this investigation are elaborated in Chapter 1. A description of the data sets and derived meteorological variables, along with the methodologies applied in this thesis, are given in Chapter 2. A theoretical review of aerosols, including their sources, effects and distribution over the globe and southern Africa, is discussed in Chapter 3. Atmospheric circulation and weather patterns and their relationship to the transport and dispersion of aerosols are described in Chapter 4. The results of the study and an analysis of the major findings are presented in Chapter 5. Finally, Chapter 6 summarises the major findings of this dissertation.
Amawoti : responding to the needs and rights of people with disabilities.
(1994) Philpott, Susan Carol.; McCarthy, Jeffrey J.; McClaren, Pamela.; Fincham, Robert John.; Lund, Frances Jane.
Abstract available in PDF.
Analysis of high ozone events over Africa using aircraft data.
(2002) Mahumane, Gilberto M. G.; Diab, Roseanne Denise.
Previous research has shown that there is considerable enhancement of tropospheric ozone over the African continent. The role of biomass burning as a source of ozone precursor gases and the atmospheric circulation, in particular the anticyclonic gyres over southern Africa, are known to be important in the accumulation of ozone over the subcontinent. In addition, the injection of ozone-rich air from the stratosphere is known to account for the occurrence of ozone peaks in the upper troposphere. This thesis is aimed at investigating the occurrence of high ozone events, defined as 2::100 ppbv, over Africa. Their variability in time (seasonal distribution) and space (latitudinal distribution) is quantified for the upper tropospheric region (~l 0 - 12 km) from 35°N to approximately 35°S . The data used are part of the MOZAIC (Measurement of OZone and wAter vapour by Airbus In-service airCraft) database. Ozone, water vapour. and temperature are measured at cruise altitude by these in-service aircraft, and this study explores data gathered on flights between Europe and Africa over the period January 1996 to December 1998. Complementary data from the European Centre for Medium Range Weather Forecasts (ECMWF) and satellite images are used to investigate case studies for selected flights in order to determine the origin of ozone episodes. Backward trajectory modeling is used to determine the source of air masses possibly related to ozone episodes. Correspondence with high potential vorticity and low water vapour content are used as stratospheric tracers and are indicative of stratospheric-tropospheric injection. Marked seasonal and latitudinal differences in the frequency and nature of ozone episodes are noted between the northern and southern latitudes. The seasonal variation of ozone episodes is more prominent in the extratropics than in the tropics. The highest frequencies are observed in the Northern Hemisphere to the north of 200N in spring and summer, and in the Southern Hemisphere to the south of 30°8 in winter and spring . Between these latitudes the distribution of peaks is sparse. An exception is observed during the austral spring when a relatively high number of peaks south of the equator is evident. The spring frequency peak is common to both hemispheres and is likely to result from a biomass burning influence, and stratospheric ozone injection into the troposphere during this season. Ozone peaks north of 15°N are greater in magnitude (up to 350 ppbv) than those in the tropics and in the Southern Hemisphere, where peaks do not exceed 200 ppbv. The horizontal extent of the ozone events ranged from a few tens of kilometers to over 1000 km in the boreal spring, although they seldom exceeded 100 km in the tropics. Two case studies were examined in detail. In the first case study, ozone peaks up to 180 ppbv were observed at approximately 12° S in the summer. They ranged between 3.5 and 21 km in horizontal extent and were accompanied by increased relative humidity and evidence of uplift. They were attributed to localized biomass burning and subsequent convective uplift to the upper troposphere. The possibility of enhancement due to convective uplift and lightning production was discussed. The second case study, in which an ozone peak of 287 ppbv was observed at approximately 31°S in springtime, had a horizontal extent of 840 km and was accompanied by low relative humidity values and high potential vorticity, indicative of air of stratospheric origin.
An analysis of municipal solid waste management in South Africa using the Msunduzi Municipality as a case study.
(2009) Naidoo, Kaminee.; Beckedahl, Heinrich Reinhard.
Municipal Solid Waste generation has become an inevitable consequence of lifestyles and daily living. However, the nature (quantity and quality) of this waste stream can vary and is largely dependent upon the manner in which waste production is managed, by both government and the public. The increasing practices of littering, dumping and burning of solid waste by households (and industries though not extensively dealt with in this study) in South Africa has led to the finding that municipal solid waste is being irresponsibly managed. In this regard, it becomes necessary to investigate the attitudes and behaviour of individuals and households toward solid waste practices, which further include mitigating measures such as reduction, reuse and recycling for the generation of solid waste. The role of the South African government in providing a refuse removal and safe disposal service to all citizens is suggestive of the responsible role of government to ensure that solid waste is being effectively managed by all sectors of society. The aims of this study in light of the above were to review the municipal solid waste policies and strategies of local government authorities in South Africa, highlighting the shortcomings and discrepancies that exist between legislative policies and actual management practices; which is also reflective of the attitudes and approaches to solid waste management by households. This was achieved by focusing on the case study of the Msunduzi Municipality and included investigations into socio-economic and cultural influences on solid waste disposal practices. The objectives of the study were achieved by means of a questionnaire survey that elicited specific responses from 650 sampled households in five suburbs of differing socio-economic status. A further analysis to identify the nature of household municipal solid waste for landfilling from three suburbs of differing socio-economic status was conducted by categorizing 25 tons of garbage at the New England Road Landfill Site, leading to inferences about consumer purchasing power and disposal practices. Further, key personnel in the Msunduzi Municipality’s waste management division were interviewed to ascertain the solid waste challenges faced at local municipal and national levels of government. The study revealed several significant findings of which the most important is that the implementation of South Africa’s national municipal solid waste legislation policies and strategies are inconsistent with local government practices and procedures; thus compromising equity, efficiency, effectiveness and the sustainability of municipal solid waste disposal. Factors contributing to this are shown to be inadequate management and service delivery. The research has shown that monitoring and control systems which purported to ensure environmental sustainability are lacking and inadequately address issues where the implementation of municipal solid waste regulations are in contravention with national solid waste policies. The outcomes of the questionnaire survey and the assessment of household municipal solid waste for landfilling reveal that socio-economic status and culture do in fact influence the nature of solid waste and the disposal methods used by residents. The receptiveness of households towards adopting suggested municipal solid waste disposal practices was also investigated. The non-compliance of residents with municipal solid waste legislation and policies points towards a lack of monitoring and control measures, thereby not providing for a sustained and adequate service delivery which is environmentally sound. The research further suggests that all sectors of the South African public and the government are inadequately informed in terms of aspects of municipal solid waste. This has led the researcher to recommend that further education and awareness campaigns and its role in environmental sustainability are needed so that a sharing of responsibility between government and the public can be effected to aid municipal solid waste management in the country. It is argued that the insight into the roles of socio-economic status and cultural influences over solid waste practices provide a platform from which municipal authorities can work to specifically address the problems associated with municipal solid waste at a community level. It is the task of the national government to ensure that South Africa’s municipal solid waste is being responsibly managed at the local municipal levels so that the health and safety of the environment and its citizens are suitably addressed, hence the focusing on solid waste legislation and national policies (which have been recognized internationally as being environmentally sound and sustainable) must be translated in terms that local municipalities can adopt, assuming that they have been sufficiently empowered in terms of both knowledge and adequate budgeting.
Analysis of surface ozone measurements at Cape Point, SANAE and City of Cape Town.
(2013) Mkololo, Thumeka.; Ramsay, Lisa Frost.
This study presents an investigation of surface ozone (O₃) at SANAE (2002 to 2009), Cape Point (1997 to 2009), Molteno (1997 to 2007) and Goodwood (2000 to 2006). The Cape Point data was statistically separated to background and non-background (anthropogenic) contributions. The main aim of the study was to investigate diurnal cycles, seasonal cycles, the weekend effect, and any long term trends in surface O₃, as well as assess meteorological controls on surface O₃ at these stations. The observed O₃ concentrations were higher during the day than at night at all stations, with urban stations (Molteno and Goodwood) showing more pronounced peak-to-peak variations relative to the marine stations (SANAE and Cape Point). The ‘weekend effect’ was evident at Molteno and Goodwood with higher O₃ and lower NOₓ concentrations on 'weekends relative to weekdays. The weekend effect on O₃ was more pronounced in winter at Goodwood and Molteno. Maximum monthly average concentrations were observed in spring at Goodwood and Molteno, with minimum in winter. The SANAE and Cape Point background O₃ maxima were observed in winter (June to August) with minima in summer (January to February). The Cape Point non-background O₃ maximum was observed in September with a minimum in summer (January). The seasonal cycles at marine sites appear to be driven by O₃ photolysis. Wind speeds played a critical role in O₃ concentrations, particularly in the continental environment. At Goodwood, high NOₓ levels are associated with low wind speeds. At SANAE, no significant O₃ differences were observed between low wind speeds and high wind speeds while at Cape Point, differences were more evident during the winter months. A decreasing O₃ trend in monthly averages was observed from 1997 to 2006 at Molteno while Goodwood demonstrated an increase of O₃ monthly averages with decreasing NOₓ monthly averages from 2000 to 2006.
An analysis of terracettes in a region of Giant's Castle Game Reserve, KwaZulu-Natal Drakensberg, South Africa.
(1998) Sinclair, Richard Roy.; Ahmed, Fethi B.
Terracettes are a widely occurring form of micro-relief found throughout regions displaying various climatic and environmental conditions. Much speculation surrounds the processes responsible for their formation and development. An investigation of these micro-forms, their associated soil physical properties, sustaining mechanisms, and their relationship to slope stability was undertaken in Giant's Castle Game Reserve, KwaZulu - Natal Drakensberg, South Africa. The study showed that relationships between terracette morphology and soil physical properties within the Reserve are few, and that current soil conditions cannot be used to infer process related to terracette formation. However dry bulk density data indicated that soil creep is the dominant formative mechanism within the Reserve. Throughflow at riser surfaces was the dominant sustaining mechanism, with needle ice growth, wind, surfacewash and animal disturbance contributing minor retreat at both treads and risers. Aspect played an important role in determining soil physical characteristics. It was inferred that terracettes imparted stability to the slopes on which they are found, and with continued retreat at both treads and risers the slope was again placed under conditions of instability.
An analysis of the impacts of human activities and management strategies on wetland processes in southern Zimbabwe.
(2015) Marambanyika, Thomas.; Beckedahl, Heinrich Reinhard.
Wetlands are one of the most productive ecosystems in the world, as they provide benefits to humans and the environment. Despite their value, wetlands are being degraded at an unprecedented rate. Whilst explanations have been sought from natural and human perspectives, the debate surrounding wetland loss continues, and wetland loss remains a problem, especially in developing countries. A number of strategies on wetland use and management have been developed and implemented at various scales in response to wetland degradation and loss, although spatio-temporal variations were noted, as were varying levels of success, shown to be influenced by differences in existing land use, institutional structures and wetland hydrogeomorphic types. Whilst several studies focusing on specific facets of wetlands have been conducted in Zimbabwe, so far none have been carried out to document the impacts of various land uses and management strategies on wetland conditions. The present study therefore assessed the spatio-temporal impacts of human activities and related management strategies on wetland processes in six wetlands located in three rural districts in the southern part of Zimbabwe so as to address this knowledge deficit. To achieve the objectives of the study, changing land use patterns in wetlands were assessed for the period between 1985 and 2013 from aerial photographs and RapidEye images; and the benefits derived by surrounding communities determined, complemented by information obtained from household surveys with 123 respondents. Results show that there was no major change in land use as cultivation dominated throughout and increased by only 7.7% between 1985 and 2013. This result prompted the need to assess the impact of cultivation on wetland biophysical conditions (hydrology, geomorphology and vegetation) using the WET-Health framework. Results show that not all, but some cultivation methods negatively affected the present hydrological state of the wetlands. It was observed that broad ridges and broad furrows and concrete canals were largely responsible for drying. Vegetation structure and composition has been seriously modified by cultivation as evident in invasion by non-wetland species. In order to understand how management strategies influenced use and conservation of wetlands, the study used stakeholders’ perceptions to investigate the effectiveness of existing institutional arrangements in regulating wetland protection. The results show that the degree of wetland protection depends on the number, frequency and relations of institutions operating at each site. Although government departments, traditional leaders, wetland committees and non-governmental organizations participated, generally there was no uniformity in the existing institutional structures at each wetland. Conflicts and discord were sometimes apparent between institutions due to divergent institutional mandates torn between socio-economic and environmental considerations. Traditional leaders and wetland committees were present at each site and where they were effectively involved, wetlands were better conserved as shown by their ecological conditions with little evidence of soil erosion and hydrological alterations as in the case of Chebvuterambatemwa, Dufuya, Madigane and Tugwi. The study further investigated the gap between policy and practice, especially in light of the new legal dispensation which encourage wise use of wetlands, dating back to 2003. The results show that most of the people (61.8%) were not aware of national wetland law; hence there was a disjuncture between legal provisions and practical implementation resulting in little impact on wetland conservation. Poor implementation of national wetland law may be ascribed to a number of socio-economic factors and institutional challenges. The results of the study further showed that in better conserved wetlands, such as Chebvuterambatemwa, Dufuya and Tugwi, effective soil and water conservation measures were in place and their implementation was effectively monitored by local institutions. Food security of most households adjacent to these wetlands was stable. Overall, the findings of this study highlighted the importance of understanding the effects of cultivation and related institutional arrangements and policy frameworks on wetland conservation. The study demonstrates the need to adopt a holistic, people-centered approach in wetland management that also considers the environment. The results further provide insights for Zimbabwe to shift towards an integrated approach, to facilitate effective and sustainable utilization of wetlands. It is in this context that this research provides baseline information that can be utilized in the formulation of wetland resources management frameworks based on an understanding of the interaction between anthropogenic, socio-economic and ecological processes.
An analysis of the potential erosional changes in the KwaZulu-Natal coastline due to the effects of sea level rise and associated storm surges.
(2015) Riddlle, Lyndon Paul.; Beckedahl, Heinrich Reinhard.
The coastlines around the world are currently in the process of being eroded by naturally occurring oceanic conditions. The vast majority of people living near or on these coastlines have no idea what they may be in store for them, with a notable exception being the coastline of the Netherlands. The aim of this research is to understand which areas on the KwaZulu-Natal coastline may be affected by the occurrence of sea level rise including the effects of future storm surges at various time intervals. The coastline is eroded continuously due to the cyclic movement of tides, waves and winds, however the most significant erosion events are likely to occur due to the combination of sea level rise and storm surges, as these both extend further inland and reach higher altitudes than the day-to-day processes of coastal erosion. The storm surge that occurred on the East Coast of South Africa in March 2007 was therefore used as a reference for storm surge as a means of comparing and modelling future storm surge events. While there is some controversy, literature suggests that the mean annual sea level rise occurs at a rate of some 15.5mm per year, although some researchers argue in favour of a rate of almost twice that. The year 2100 was used as the target date to replicate the worst case scenario storm event, but without accounting for a potential increase in the storm intensity driven by global warming.. Coastal protection infrastructures have been installed in some areas, but have been found not to work effectively, occasionally even exacerbating the effects of erosion. Results suggested that by 2100, the sea level rise alone would not have had much of an effect as it is projected to rise by an average of 2m. When this is, however, coupled with a storm surge threshold of 3.5m, most of the study sites along the KZN coastline would experience significant flooding and associated destruction. The research is of a hypothetical origin and the predictions may or may not occur. If the hypothesis would have to be correct, then the planning for prevention methods may be too late. Thus this research must be considered as new information to assist with coastal management. If the projection into the future is taken to include replication of an event with the intensity equivalent to that of the March 2007 event, flooding may reach as high as 10m with catastrophic social and economic consequences. Only time and judicious forward planning with a re-think of the Coastal Zone Management Act will alleviate problems in the future.
Analysis of the rural development experience in the former Transkei : the case of Xalanga District.
(1997) Kodua-Agyekum, Collins.; Willis, Geoffrey A.; Oelofse, Catherine.; Brooks, Shirley.
The period after World War II has witnessed an upsurge in the interest in the plight of the people entrapped in desperate poverty and deprivation in the Third World countries. However, even with the focus on underdeveloped countries, the number of rural poor in the Third World continues to increase and their living conditions degrade. The crux of the problem is that the rural poor cannot contribute significantly to their own development owing to the nherent inequalities in the distribution of production factors and the benefits economic development and technological advancements under the umbrella of capitalism. In response t.o this, rural development is a deliberate intervention programme designed to augment the coping strategies of the rural poor by drawing them gradually into the mainstream of development action in an attempt to alleviate rural poverty and misery, and empower them to realise their potential and human dignity. This thesis is a critical evaluation of the rural development process and its impact on the living conditions of the rural poor in the former Transkei with special reference to Xalanga District. Transkei and Xalanga District have been chosen for the study because the former is the poorest and most populous ex-homeland and the latter is the poorest district in the former Transkei. The roles of rural development functionaries, in terms of their policies, programmes, practices and achievements, and the living conditions, needs, aspirations and perceptions of the beneficiaries came under the spotlight. Rural development is a multi-faceted concept therefore the approach of the study was eclectic, rooted in the realist and structurationist philosophies; and the data solicited was analysed both quantitatively and qualitatively. The quantitative techniques employed were factor and discriminant analyses The study revealed that the rural development process in the sub-region is fraught with administrative, political and social, fmancial and technical constraints. Consequently, the process has not had any significant impact on the living conditions of the rural poor with regard to the alleviation of rural poverty, unemployment and inequalities in the distribution of incomes and assets. Besides, it has not created sound economic bases in the rural areas and has thus failed to empower the rural people to take effective charge of their lives. The development efforts continue to be concentrated in the urban and peri-urban areas, causing considerable imbalances in the spatial development of the territory. On the basis of the outcome of the research, some suggestions have been offered for a meaningful rural development programme for the former Transkei.
Application of intertidal salt-marsh foraminifera to reconstruct late Holocene sea-level change at Kariega Estuary, South Africa.
(2013) Strachan, Kate Leigh.; Hill, Trevor Raymond.; Finch, Jemma M.
Unclear predictions surrounding climate change, associated sea-level rise and potential impacts upon coastal environments have placed an emphasis on the importance of sea-level change. Past sea-level fluctuations have been measured using biological and geomorphological forms of evidence. One such biological proxy is salt-marsh foraminifera, which have been used as a high-resolution indicator of past sea-level change, based on the assumption that surface foraminiferal assemblages are similar in composition to buried fossil foraminifera. In South Africa, there is ongoing research seeking to produce high-resolution records of sealevel change, however foraminifera remain an underutilized source of proxy evidence. This research applies salt-marsh foraminifera as precise indicators of relative sea-level change at Kariega Estuary on the Eastern Cape coastline of South Africa. Distributions of modern foraminiferal assemblages were investigated, revealing vertical zonation across the intertidal zone. The foraminiferal and marsh vegetation zones were in part similar and overlapped to a certain extent, identifying three zones; high, low and tidal flats. This suggested foraminiferal distribution is a direct function of elevation relative to tidal fluctuation. A 94 cm core consisting of peat, sand and clay sediments was extracted from the salt marsh. A chronological framework for the core was based on five AMS radiocarbon age determinations of both bulk sediment and shell fragment samples placing the record within the last 1500 years Before Present (BP). The basal shell age was a clear outlier to all bulk sediment ages, possibly as a result of shell recrystallisation. The bulk sediment age determinations suggested two possible age reversals, potentially linked to sedimentary hiatus or contamination. These inconsistencies in the chronology were best viewed as separate age models. The core was analysed at a high resolution, whereby fossil foraminifera were extracted every 2 cm’s down the core. A transfer function was applied to calculate the former elevation at which each core sample once existed, to produce a relative sea-level reconstruction. The reconstruction was related to the age models to produce two possible sea-level curve scenarios. Reconstructed curves from both scenarios depict a 0.5 m (±0.16 m) sealevel highstand at 1500 cal years BP followed by a lowstand of -0.6 m (±0.03 m). Scenario One reached its lowest recorded sea-level between 600 cal years BP and 500 cal years BP and then fluctuated below present day levels. Scenario Two reached its lowest recorded sea-level around 1200 cal years BP, followed by low amplitude fluctuations and a relatively stable period from 100 cal years BP till the present day. The 1500 cal years BP highstand recorded for both scenarios correlates well with existing palaeoenvironmental literature from the southern African coastline. Chronological limitations associated with the remainder of the record hinder inter-comparison with previous studies. The outcomes of this research suggest that intertidal saltmarsh foraminifera demonstrate enormous potential for the high-resolution reconstruction of relative sealevel change in the South African context.
The application of remote sensing in drought monitoring : a case study of KwaZulu-Natal, South Africa.
(2017) Lang, Simon Duncan.; Mutanga, Onisimo.
Drought is a severe natural disaster which occurs across wide spatial boundaries and inconsistent temporal patterns. The slow onset and gradual formation of drought highlights the importance of early detection, allowing for appropriate time in implementing relief and mitigation procedures. The vague extensiveness of drought raises concern on the ability for site specific ground based weather stations to assess the full extent of a drought occurrence. This problem is further compounded in developing nations, such as South Africa, where weather stations suffer from missing historical records and are poorly distributed across harsh inaccessible rural areas. Remote sensing seeks to resolve this problem through the high resolution, near real-time and multitemporal spatial coverage it possesses. Based on that premise, this study sought to evaluate the evolution of remote sensing on drought monitoring and subsequently conduct a remote sensing drought assessment, to determine the accuracy and potential for future drought occurrences. The scope of this study was to firstly to evaluate the evolution and progress of remoting sensing approaches in drought monitoring, which was completed as a systematic literature review. Secondly, a drought assessment was conducted in KwaZulu-Natal, South Africa. Focusing on the ability of the Normalized Difference Vegetation Index (NDVI) to observe any trends of vegetation drought over the past 16 years, confirmed through rainfall data. Findings from this study concluded the following. Firstly, there has been substantial growth in research papers pertaining to remote sensing on drought; particularly over the past decade. Secondly, developing nations have limited resources available and should consider the advantages possessed by remote sensing. Thirdly, remote sensing results complimented climate conditions recorded over the past 16 years. Fourthly, future studies should look to include additional indices to strengthen the broadband NDVI, which was affected by the saturation of vegetation biomass.
The application of saltmarsh foraminifera in the reconstruction of sea level along the southern African coastline.
(2022) Pillay, Tristan Reece.; Hill, Jemma May.; Pretorius, Lauren.
Accelerations in global sea-level rise are a major concern for coastal areas, but the geographical expression of sea-level variability is poorly constrained, especially in data-scarce far-field locations. Southern Africa is a case in point, where the tide gauge record is limited, and longterm sea level data points are spatially and temporally discontinuous. One technique which has shown promise for producing continuous sea-level records, is the application of intertidal saltmarsh foraminifera, which are widely used as a robust, high precision sea-level proxy in temperate regions. This research uses saltmarsh foraminifera from the Kromme Estuary, to investigate late Holocene sea level on the southern coastline of South Africa. The first paper presents a review of recent sea-level research from southern Africa, with a focus on the Common Era (past 2000 years), to contextualize the second, data-based paper from the Kromme Estuary. Modern saltmarsh foraminifera were sampled across intertidal zone, to establish vertical zonation of foraminiferal assemblages relative to the tidal frame, and ultimately used to develop a transfer function for quantitative sea-level reconstruction. Subsurface marsh sediment was surveyed and used to inform coring locations. The master sediment core was processed for sedimentological and foraminiferal analysis. Six samples of picked plant macrofossils were sent for Accelerator Mass Spectrometry radiocarbon dating, and used to produce a Bayesian age-depth model. The Kromme record extends ~1 000 cal yrs with a hiatus observed from ~400 - 600 cal yrs BP. Calcareous species dominate the basal part of the record, preventing quantitative sea-level reconstruction, however, species assemblages and sedimentology data consisting of low organic content and medium to coarse sand occurring from ~340 cal yrs BP to present, suggest lower than present sea level. Agglutinated species from the upper portion of the core with associated high organic matter and medium sand from ~180 cal yrs BP were used to reconstruct sea level. The quantitative reconstructions spans ~200 years, with the lowest sea-level estimated at 180 cal yrs BP which broadly coincides with the Little Ice Age (~650 - 100 cal yrs BP) and Maunder Minimum (~305 - 235 cal yrs BP), followed by rising sea level till present day level. The sea-level reconstruction from the Kromme Estaury is supported by previously published sea-level studies in southern Africa and provides a detailed reconstruction of sea level that can inform regional sea-level trends, contributing to coastal planning, and provides an opportunity to explore the possible anthropogenic effect on sea-level variability.
Applications of remote sensing in sugarcane agriculture at Umfolozi, South Africa.
(2004) Gers, Craig Jonathan.; Hill, Trevor Raymond.
The aim of this study was to evaluate potential applications of remote sensing technology in sugarcane agriculture, using the Umfolozi Mill Supply Area as a case study. Several objectives included the evaluation of remotely sensed satellite information for the following applications: mapping of sugarcane areas, identifying sugarcane characteristics including phenology, cultivar and yield, monitoring the sugarcane inventory throughout the milling season and yield prediction. Four Landsat 7 ETM+ (Enhanced Thematic Mapper Plus) images were obtained for the 2001-2002 season. Mapping of sugarcane areas was conducted by .means of unsupervised hierarchical classifications, on three relatively cloud free, Tasseled Cap transformed images. The Brightness, Greenness and Wetness bands for each Tasseled Cap transformed image were combined into a single image for this classification. The investigation into relationships between satellite spectral reflectances and phenology, cultivar and yield involved the cosine of the solar zenith angle (COST) method for atmospheric correction of all four Landsat 7 ETM+ images. Detailed agronomic records and field boundary information, for a selection of sugarcane fields, were used to extract the at-satellite reflectances on a pixel basis . These values were stored in a relational database for analysis. Monitoring of the sugarcane inventory throughout the milling season was conducted by means of unsupervised classifications on the Brightness, Greenness and Wetness bands for each of the four time-step Tasseled Cap transformed images. Accurate field boundary information for all sugarcane fields was used to mask out non-sugarcane areas. The remaining sugarcane areas in each time-step image were then classified by means of unsupervised classification techniques to ascertain the relative proportions of the different land covers, namely: harvested immature and mature sugarcane by visual interpretation of the classification results. The yield forecasting approach utilized a time-step approach in which Vegetation Indices (VIs) were accumulated over different periods or time frames and compared with annual production. VIs were derived from both the National Oceanic and Atmospheric Administration (NOAA) and Landsat 7 ETM+ sensors. Different periods or times were used for each sensor. The results for the mapping of sugarcane areas showed that the mapping accuracies for the large scale grower fields was higher than for the small-scale growers. In both instances, the level of accuracy was below that of the recommended sugar industry mapping standard, namely 1% of the true area. Despite the low mapping accuracies, much benefit could be realized from the map product in terms of identifying new areas of sugarcane expansion. These would require detailed accurate mapping. The results for monitoring of the sugarcane inventory throughout showed that remote sensing, in conjunction with detailed field information, was able to accurately measure the areas harvested in each time-step image. These results may have highly beneficial applications in sugarcane supply management and monitoring. The results for time-step approach to yield forecasting yielded poor results in general. The Landsat derived VIs showed limited potential; however, the data were only available for one season, making it difficult to quantify the impact of climatic conditions on these results. All results for the time-step approach using NOAA data yielded negative results. The results for the investigation into relationships between satellite spectral reflectances and phenology, cultivar and yield showed that that different phenological stages of sugarcane growth were identifiable from Landsat 7 ETM+ at-satellite reflectances. The sugarcane yields and cultivar types were not correlated with the at-satellite reflectances. These results combined with the sugarcane area monitoring may provide valuable information in the management and monitoring of sugarcane supply.
Are non-governmental organisations effective in increasing access to agricultural markets within rural communities? A comparative study of female smallholder farmers within the eMazabekweni, KwaNokweja, Hopewell and Carisbrooke communities, Ubuhlebezwe Local Municipality, KwaZulu-Natal, South Africa.
(2019) Hansrod, Laila.; Desai, Sumaiya Amod.; Nkomo, Sphumelele Lucky.
Background: Poverty within rural areas encourages females to practice smallholder farming as a poverty alleviation strategy. Whereby female smallholder farmers provide for themselves and are able to sell their produce to sustain their livelihoods. Female smallholder farmers often do not have the capability to participate in agricultural markets due to their lack of access to these markets, resources, inputs and extension services. These limitations decrease the ability of a rural female smallholder farmers to be able to maintain their livelihoods, whilst ensuring food security within their households. Non-Governmental Organisations (NGOs) claim to provide farming assistance to minority groups, such as women. The objective of this thesis was to determine whether NGOs are actually making a difference among rural communities. Aim: The aim of this study is to investigate the effectiveness of NGOs in increasing access to agricultural markets as a poverty alleviation strategy amongst female smallholder farmers. Methods: Comparative research was undertaken among female-headed households from two smallholder farming communities that received agricultural assistance from NGOs and two smallholder farming communities who were unable to access any assistance from NGOs. These communities fell within the Ubuhlebezwe Local Municipality, and are the eMazabekweni, KwaNokweja, Hopewell and Carisbrooke communities. A purposive sampling strategy was utilised. The study employed triangulation, utilising both quantitative and qualitative data collection strategies. Quantitative methods included a structured questionnaire which was followed by statistical analysis using Statistical Package for Social Science version 25. Qualitative methods included participatory exercises and focus group discussions. Results: While NGOs are present within the eMazabekweni and KwaNokweja communities, their presence has not majorly assisted women to overcome institutionalised barriers such as access to agricultural markets. It was found that the Hopewell and Carisbrooke communities, who do not receive any assistance, lie in a state of disrepair as compared to those communities who do receive assistance. Therefore it must be noted that while assistance from NGOs within the eMazabekweni and KwaNokweja communities have had a minimal trickledown effect among female smallholder farmers, they were still able to make a minuscule difference. However, the implementation of these programmes are not sustainable for the future and only provide a short-term band-aid solution. Conclusion and recommendations: Programmes for the provision of extension support need to be designed to specifically target women within rural communities while taking institutionalised barriers to agricultural market access into consideration. Additionally, communities need to be involved in the development of programmes that are going to be initiated within their communities.
Aspects of the weathering of the Clarens formation in the KwaZulu/Natal Drakensberg : implications for the preservation of indigenous rock art.
(1994) Meiklejohn, Keith Ian.; Hall, Kevin John.

Browse

Browsing Geography by Title