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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An exploration of the post-harvest activities of the Olifants Estuary Small-Scale Fishery: recommendations for equitable market access and beneficiation

Louw, Tayla Susan 13 August 2021 (has links)
Small-scale Fisheries (SSFs) play a key role in poverty alleviation of rural coastal populations through the provision of food security and income generation. Yet, many SSFs fail to maximise the value potential of the seafood products they produce as a result of post-harvest losses and marketing challenges. SSFs within South Africa are no exception and are particularly disadvantaged as a result of historical discrimination, marginalisation, management, data deficiencies and inequitable market access. The financial, technical and information challenges that characterize small-scale fisher households present many barriers to accessing and maximizing market opportunities. Worldwide, and in South Africa, understanding of post-harvest losses, limitations and market constraints, is limited. Therefore, this research aims to better understand the post-harvest activities of the small-scale fishers of the Olifants estuary in order to identify opportunities for value addition and improved market access. A mixed-methods approach was employed including analysing data from community fisher logbooks and conducting semi-structured interviews with both fishers and marketers. This research has demonstrated that inadequate facilities, lack of technology and transport as well as limited knowledge have all contributed to post-harvest losses and affected the income potential for these fishers. Inequitable market forces have been shown to exist in the Olifants fishery value chain. Consequently, these small-scale fishers are price-takers since they lack the capacity required to participate in value chain negotiations and development. Furthermore, these fishers are vulnerable to the consequences of poor governance, the vagaries of marketers and the misperceptions and preferences of consumers regarding their fish products. Recommendations include building capacity and skills of the Olifants fishers to professionalise their operation, adjusting several of their postharvest activities and incorporating those suggestions offered by the marketplace that are achievable.
2

Municipal bonds in sub-Saharan Africa: the checkered past of debt instruments in an era of incomplete decentralization

Gorelick, Jeremy 10 March 2020 (has links)
Cities across sub-Saharan Africa are faced with challenges in urban planning and service delivery due to insufficient capital for long-term investment projects. Despite the success of municipal bonds as a tool to assist in closing this financing gap in much of the rest of the world, there have been limited examples of success in this region. This study looks at the universal obstacles limiting sub-national governments from using municipal bonds as a financial instrument before examining four case studies - Johannesburg, Douala, Dakar and Kampala - to better understand their approaches to municipal bond issuance. Based on the findings from research, the thesis concludes that the chief obstacle blocking the uptake of municipal bond issuance as a means for raising funds stems from a variety of elements in the constitutional and regulatory systems in each country. This represents a significant departure from the commonly-held understandings that cities in the region are not eligible for long-term debt and are ill-managed, lack capacity, or are not viewed as creditworthy by institutional investors and other purchasers of municipal bonds. The success of municipal bond issuance appears to be contingent on strong interlinkages between central and subnational governments. This dissertation offers a critical review of the explicit and implicit powers granted to local governments under the constitutions of each of the countries, specifically the legislation that enables or prohibits municipalities from issuing bonds. Reform to the existing regulatory and legal environments across the African continent, ones that govern a financially-sustainable level of indebtedness for sub-sovereign governments, is an essential step in ensuring the future growth of Africa’s cities.
3

An integrated approach to climate vulnerability and adaptation assessment of smallholder production systems: evidence from horticultural production in Ghana

Williams, Portia Adade 06 November 2020 (has links)
The consequences of changing climate mainly impact negatively on agricultural production, particularly smallholder producers. Despite increased research on vulnerability and adaptation, African countries have still not realized their full potential in adapting to changing climate. Climate vulnerability assessments show limited use in guiding decision support for adopting proposed adaptation responses identified. This study examines climate vulnerability of smallholder producers and economically evaluates adaptation strategies identified. This is to enhance vulnerability assessment practice and provide support for decision-making on adoption to influence local level planning and actions on climate adaptation. The study further explores approaches to vulnerability assessment that link climate adaptation process. Smallholder horticultural production system in Ghana provided an appropriate case for this study. Mixed methods approach that combined field surveys, in-depth interviews, focus group discussions and field observations in two horticultural growing municipalities in Ghana (Keta and Nsawam) were adopted. Both qualitative and quantitative inputs for analysis were obtained. Specifically, a combination of theoretical insights from livelihood analysis (Livelihood Vulnerability Index) with an appraisal method (Cost Benefit Analysis) arising from an investment in adaptation options was used as the analytical framework for the study. Smallholder farmers in both case study sites showed different vulnerabilities based on their levels of exposure, sensitivity and adaptive capacity. Local knowledge, perceptions and effects of climatic trends (eg. increasing temperature and decreasing rainfall) on farmers' livelihoods resulted in identification of about twenty-four strategies practiced by farmers to manage changing climate. Costs and benefits analysis of the first five adaptation strategies indicated economic effectiveness both privately and publicly if adopted. However, in consideration of other factors like capital required, payback period for investments made and risks from implementation, two of the adaptation strategies particularly appeared as most suited choices while the role of targeted and dedicated external institutional, policy and stakeholders' support turned out to be paramount for successful adaptation. These observations have implications for the degree of influence vulnerability assessment has for local level planning and actions on climate adaptation. The study underscores vulnerability and adaptation should be considered synergistically. It therefore proposes a framing of vulnerability assessment to explicitly incorporate adaptation actions and their benefits to reduce vulnerability and provide better linkages to decision-making and policy relevance. Making decision support a major outcome from vulnerability assessment extends assessment outcomes from identification of vulnerable people/places to include identification and evaluation of adaptation responses, which facilitate the prioritization and selection of adaptation options for adoption. It concludes by highlighting pathways to reduce the vulnerability of farming communities such as exploring opportunities to expand a system's adaptive capacity through empowering farmers' socially and economically. Extra knowledge and policy interventions in vulnerability and adaptation discourse are further suggested to promote and encourage adaptation efforts.
4

Unlocking small-scale fisheries value chains through Information & Communication Technology (ICT) - the case studies of Lamberts Bay & Kleinmond, South Africa

George, Robin Peter 18 February 2020 (has links)
Focusing on the small-scale fisheries sector, this thesis examines the question of how the usage of Information and Communication Technology (ICT) can unlock value chain opportunities for fishers. Using a case study approach by focusing on the communities of Lamberts Bay and Kleinmond in the Western Cape of South Africa, it seeks to discover what ICTs should take cognisance of to adequately speak to the value chain realities of small-scale fishers. Some of the work done was observed while engaging with fishers from both communities and other relevant stakeholders during certain engagements with the Abalobi programme, a co-designed smartphone application programme. The emphasis of the research was to speak to different stakeholders who are involved in the value chain and who are engaging with or impact the value chains of small-scale fishing communities. As value chains start with small-scale fishers, their narratives are of utmost importance as they are the initiators of these value chains. The three objectives of this research are to understand the value chain activities of the two communities, differentiate the different value chain activities of the communities at the local, regional and international levels and then contribute to how ICTs such as Abalobi can assist efforts of connecting fishers to their markets. Interviewing and engaging fishers, supportive organisations, authorities, value chain stakeholders in both communities as well as corporates and an ICT specialist, the thesis considers the different perspectives and needs of those involved in the small-scale fisheries value chain. The result of this thesis lead to six ICT requirements being identified to unlocking of small-scale fishing value chains: easy to use, self-sustaining, people-centred and inclusive, integrated, evolving and detailed. Although value chains exist in the sector, ICTs can enable better coordination between stakeholders in it. This research was done to understand how ICTs as a tool can improve and better facilitate the interactions between fishers and their desired markets and that their narratives are brought to the fore in understanding the value chains and in sourcing ICT solutions for them.
5

The use of biofiltration cells to filter contaminated water flowing from a slum settlement in South Africa

Ghanashyam, Aniket 09 March 2020 (has links)
Polluted urban surface runoff degrades the receiving water bodies and impacts on downstream water quality and ecological systems. In response, there is growing research attention that is focused on how to treat surface water runoff before it is discharged into these water bodies which includes using a variety of land-based treatment systems. This thesis investigates the performance of large scale, low-cost nature-based filtration systems to clean contaminated water without the addition of chemicals. A relatively small portion of water that is generated and discharged from a slum settlement in South Africa, where water-based services are limited and often dysfunctional, is intercepted and diverted through six biofiltration cells. These cells were packed with different types of natural media, three of which were planted with a variety of reeds while the other cells were kept as control cells. Water that flows into each biofiltration cell is controlled via a network of valves. Flow meters were used to determine the volume and rate of discharge to each cell. The purpose of this study was to determine the effects of HLR (hydraulic loading rate) and HRT (hydraulic retention time) on water quality that was discharged from each cell. This study determined whether the resulting effluent could be repurposed for irrigating edible crops. The final discharge was tested to confirm the differences between the influent and effluent in each cell. Overall the vegetated cell that was packed with large stones (19 - 25 mm aggregates) (LSV) performed the best and displayed reductions of 98.51% of ammonia and 100% of orthophosphate concentrations. E. coli bacteria were also reduced by nearly 100%. Phytoremediation played a role in reducing contamination by removing 97.07%, 89.70% and 100% for ammonia, orthophosphate and E. coli respectively over the study period of four months. Throughout the study, Large Stone Vegetated cells (LSV) reduced nitrite levels by 77.21% with higher removal rates for ammonia, orthophosphate, nitrites, respectively, compared to Large Stone cells (LS). An HRT of approximately seven days resulted in the most improved water quality for LSV, LS, Small Stone (SS) and Small Stone Vegetated cells (SSV) for most of the parameters that were tested. However, orthophosphate leaching occurred in the SSV cell. Peach Pip Vegetated cells (PPV) and Peach Pip cells (PP) did not perform as well as the other cells.
6

Towards “just” energy transitions in unequal societies: an actor-centric analysis of South Africa's evolving electricity sector

Nkata, Zimkita 28 April 2023 (has links) (PDF)
The rapid and intensifying impacts of the changing climate and subsequent need to alleviate these have resulted in the synonymous pathway towards a global energy transition. Through enhanced national climate action plans, countries worldwide are formulating development pathways that are aligned to a carbon-neutral and net-zero emissions global economy. The recent IPCC Sixth Assessment report confirmed, once again, the urgency to reduce emissions to prevent catastrophic climate impacts. While nations have submitted their enhanced climate action plans, developing countries like South Africa battle with severe developmental challenges. The imperative to respond to climate change alongside addressing entrenched development challenges such as high unemployment, inequality, and poverty make it essential for the country's energy transition to be just. Frameworks theorising technological transitions predominantly originate from the global north. Thus, to avoid adopting frameworks from their place of origin and replicating them in different contexts, this study merges Geel's multi-level perspective (MLP) framework with the energy justice framework to have a better understanding of the composition of actors and discourse shaping South Africa's just energy transition debate. The study achieves this by operationalizing a range of qualitative discursive approaches, namely content and media frame analysis. Over an 11-year study period, online newspaper articles are used as a unit of analysis to develop actor categories, these are accompanied by frames (in the form of statements said by the identified actors). With the assumption of there being no agency at the landscape level of the MLP, landscape developments placing pressure on the regime identified from the analysis include the climate change phenomenon, pressure from the international community, and declining global demand for coal. At the regime level, actors engaging in activities reinforcing the status quo such as Eskom and members of business fell within the incumbent (core) actor category whereas actors who were identified as outsiders (i.e., those that openly criticize the regime by highlighting problems associated with it) mainly consisted of civil society groups. Within each actor category, actors use discourse that either stabilizes or destabilizes the regime. At the niche level, the financial intermediary role played by development finance institutions (DFI's) emerged as key to creating protective spaces for the adoption of renewable energy technologies throughout the study period. Finally, because of the varying levels of power and interactions between actors across the multiple levels of the country's energy transition, issues of fairness in decision-making (procedural justice), representation (recognitional justice) and share in costs and benefits of the regime and transition emerge (distributive justice).
7

Investigating weather information needs of smallholder farmers in the Eastern Cape province of South Africa

Mantshiyose, Abenathi 04 July 2023 (has links) (PDF)
South Africa is continuously experiencing irregular weather and climate, which is attributed to climate change and the El Niño Southern Oscillation. These have resulted in temperature increases, irregular rainfall patterns, and increased frequency of extreme events. In South Africa, smallholder farmers are the most vulnerable to extreme weather events due to their limited capacity to adapt. Their vulnerability results from a series of factors constraining their ability to adapt, such as limited resources, knowledge, and skills. Furthermore, smallholder farmers are highly dependent on rainfed agriculture, making them more sensitive. The lack of weather information that is tailored for user needs or adapted well enough is also a concerning issue that exacerbates the living conditions of smallholder farmers. This makes it difficult for them to sustain their agricultural activities. Over the years, weather information has been recognized as having the potential to be useful in agriculture, especially in informing farming practices, planning, and reducing weather events impacts among smallholder farmers. However, access and use of weather information that applies to the context of smallholder farmers which is tailored to meet smallholder farmers needs, has been limited and has contributed to limited understanding and low use levels of weather information. This has increased the need to understand the weather information needs of smallholder farmers as this is important to ensure that farmers can effectively use and understand the information. In South Africa, limited studies have looked at the weather information needs of smallholder farmers. Hence, a shift of attention towards investigating the weather information needs of smallholder farmers has increasingly become necessary. The present study investigated how to better communicate the weather information needs of smallholder farmers in the Eastern Cape province of South Africa. A mixed-methods approach was used to collect and analyze the data. Interviews with open-ended and closed-ended questions were conducted with smallholder farmers and agricultural extension officers. Interviews were conducted to gain an insight on the baseline and characteristics of weather information farmers receive and their needs. The same was done with extension officers to get their insight on the needs of farmers and the needs of extension officers. 2 The findings of the study confirm that the current weather information system is inefficient as the information does not fully meet the needs of smallholder farmers. Most of the farmers expressed that they currently receive information on rainfall, temperature, and heavy rainfall but stated that they would like to receive information on drought as they are currently experiencing dry periods. The farmers mentioned that they receive weather information mostly from the television, radio, and a few from weather apps. Most of the farmers receive weather information in maps and audio, expressing that maps make it easy for them to visualize and understand the information. From the television, they receive the information in IsiXhosa and IsiZulu, and they mentioned that weather information in IsiXhosa is easy to understand as it is their local language. In weather apps, farmers mentioned that they receive weather information in English and expressed concerns about understanding weather information in English. As a result, most farmers preferred receiving weather information in IsiXhosa as they can understand the language. Additionally, farmers also expressed that they only receive weather information daily, and they stated that they would like to receive weather information daily, weekly, monthly, and seasonally to plan their farming activities and to know when to plant. Furthermore, most of the farmers expressed that they encounter some challenges with the information they receive. Some of the challenges included issues such as the inaccuracy of the information and scale issues. The farmers complained that the information they receive is not downscaled to their local scale, making it difficult for them to apply the information on their local scale decisions. Therefore, without significant improvement of the issues mentioned above and addressing the weather information needs of farmers, weather information use and understanding will remain low and will increase the vulnerability of smallholder farmers to extreme weather events. To prevent this, there is a growing need for weather information to meet the needs of smallholder farmers so that they can understand and use the information efficiently, especially in the face of increasing extreme weather events such as drought in South Africa.
8

Understanding the characteristics of cut-off lows over the Western Cape, South Africa

Abba, Omar Sabina January 2020 (has links)
Cut-off lows (COLs) are an important rainfall source in the Western Cape. While several studies have examined the devastating impacts of COLs during extreme rainfall events, little is known about the characteristics of COLs during droughts and how the characteristics are influenced by the South African complex topography. This thesis investigates the interannual variability of COLs and COL precipitation over Western Cape, with a focus on the 2015 - 2017 drought that affected the region and examines how well climate models simulate the variability. It also studies how the complex topography of South Africa influences the COLs characteristics. Four types of datasets (observation, satellite, reanalysis, and simulation) were analysed for the thesis. The observation, satellite and reanalysis data were analysed from the period 1979-2017, while two simulations were performed using a regional climate model (called WRF) and a variable grid model (called MPAS) for the period 2007-2017. A COL tracking algorithm was used to extract all the COLs that occurred in the vicinity of the Western Cape during the study periods. The Self Organising Map (SOM) was used to classify the COLs into groups based on their precipitation patterns. The upper-air data was analysed to study the characteristics of the COLs in each group. To examine the role of topography on COLs, WRF was applied to simulate three COLs over real and three idealised terrains (i.e. "no topography", "only-west-topography" and "only east topography"). The results show that, on average, the Western Cape experiences 10 COLs per year and the COLs contribute about 11% of the annual precipitation over the province, although with a large interannual variability. In 2015 and 2016, the COLs occurred more frequently than normal, with more than normal precipitation contribution, thereby reducing the drought severity in the two years. Contrarily, in 2017, the COL frequency and precipitation contribution were less than normal, because COLs were mainly seen further south. Nevertheless, we found that an increase in annual COL frequency does not always lead to an increase in the annual COL precipitation, because the COLs produce different amounts of precipitation. More than 45% of the COLs over the Western Cape produces little or no precipitation. The SOM results reveal that the spatial distribution of COL iv precipitation can be grouped into four major patterns. The first pattern indicates precipitation over the entire Western Cape while the second shows little or no precipitation; the third and fourth patterns feature precipitation over south-east coast and south-west coast, respectively. The major difference between the first pattern (i.e. wet cols) and the second pattern (dry COLs) is that while the wet COL is associated with a southward transport of warm and moist tropical air towards the Western Cape, the dry COL is not. Hence, the contrast between the warm and cold air mass is weaker in dry COLs than in its wet counterpart. The models (WRF and MPAS) capture the seasonal and annual climatologies of COLs and their precipitation. However, they do not always capture the inter-annual variability, with WRF outperforming MPAS in general and during the drought period. Both models represented all the COL precipitation patterns well but under-estimated the frequency of dry COLs throughout the seasons. However, the models were able to simulate the general observed differences between dry and wet COLs. WRF simulation shows that topography influences the precipitation, track, formation and vertical structure of COLs. Topography provides the additional forcing needed for COL formation. The results of this study may be applied to improve monitoring and prediction of extreme rainfall events over the Western Cape.
9

Continuity and change in the cultural landscape of Table Mountain

Fuller, Sam January 1999 (has links)
Includes bibliographical references. / Table Mountain is an inherently physical and natural landscape that also holds deep cultural meaning, symbolism and value for generations of Capetonians, past and present. The first detailed accounts and artistic representations of Table Mountain come from the early European discoverers, sailors and colonists who travelled to the Cape. These visitors, prejudiced by imperial rhetoric, were polarised in their perceptions of the Mountain between those who viewed it as a heavenly paradise and others who considered it a hellish purgatory. When science and logic eventually subdued the myths and mysteries associated with the ‘Dark Continent’ of Africa the polarised conception of Table Mountain’s cultural landscape was transformed into one of savagery and opportunity. indeed, from the sixteenth to eighteenth century, Table Mountain was effectively a microcosm for European attitudes, assumptions and evaluations of Africa. In the 1990’s Table Mountain's cultural meaning is still divided between those who seek to conserve and preserve its natural and spiritual integrity and those who believe that utilising the Mountain’s landscape as a material asset is the best means for ensuring and justifying its survival. A post-modern perspective highlights the broad range of economic, spiritual, ecological and community based values the Mountain holds for Capetonians and South Africans in general. Set against this viewpoint, Table Mountain, under the structured management of South Africa National Parks, is increasingly becoming a modernist cultural landscape governed by principles of universality, order and control. The ideological clashes that arise from these contrasting interpretations of the Mountain result in the defining characteristic of Table Mountain’s cultural landscape in the 1990’s being one of conflict and reproach. Ultimately by marrying the local and nationalised concepts within the South African landscape tradition to the broader frameworks of landscape study in wider geography, this thesis formulates an eclectic approach to studying a deeply meaningful and complex cultural landscape.
10

Common property regimes and land reform in Namibia : a case study of Skoonheid, Omaheke region

Mafune, Itani January 1998 (has links)
Bibliography: leaves 84-90. / This dissertation is concerned with the question of local resource use. It explores this question and more specifically common property resource management regimes using Skoonheid Resettlement Project in the Omaheke Region in Namibia as a case study. This study was born out of a Retrospective Assessment of the Environmental Implications of Resettlement in Namibia, commissioned by the Namibian Programme to Combat Desertification (NAPCOD) through the Namibian Ministry of Environment and Tourism (MET).

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