Faculty of Engineering and the Built Environment (ETDs)

Permanent URI for this communityhttps://hdl.handle.net/10539/37934

For queries relating to content and technical issues, please contact IR specialists via this email address : openscholarship.library@wits.ac.za, Tel: 011 717 4652 or 011 717 1954

Browse

Search Results

Now showing 1 - 10 of 48

An evaluation of city improvement districts in promoting positive social- spatial structures and management processes: a case study of Hillbrow Ekhaya Improvement District, Johannesburg
(University of the Witwatersrand, Johannesburg, 2024) Tepkeny, Gloria; Klug, Neil
This study aims to assess the effectiveness of City Improvement Districts (CIDs) in fostering positive social-spatial structures and management processes within urban areas. Specifically, the study focuses on the Hillbrow eKhaya Improvement District in Johannesburg, South Africa, as a case study. The research utilizes a qualitative research design method approach, combining semi-structured questionnaires, in-depth interviews, observation, photography, reconnaissance visits, and qualitative data analysis assessments and transcriptions to provide a comprehensive understanding of the impact of city improvement districts on the local community and urban management. By analysing the Hillbrow eKhaya Improvement District’s initiatives, successes, challenges, and stakeholders' perceptions, the study seeks to contribute valuable insights into the role of city improvement districts in enhancing urban living conditions and social cohesion. Understanding the intricate relationship between physical urban spaces and social interactions is crucial for urban planners, policymakers, and researchers seeking to create vibrant, inclusive, and liveable cities. By evaluating the Hillbrow eKhaya Improvement District, this study intends to provide insights into the potential of improvement districts to promote positive social- spatial structures and effective management processes in urban areas. The findings of this research could inform urban planners, policymakers, and local communities about the benefits and challenges associated with improvement districts, contributing to more sustainable and liveable cities.
Determining the parameters for the sizing of sediment traps in the city of Johannesburg
(University of the Witwatersrand, Johannesburg, 2024) Raliengoane, Mankoe Francis; Fitchett, Anne
Urban land practices usually involve soil compaction and vegetation removal as cities expand and grow. This has led to increased flood peak flows and high stormwater runoff volumes associated with sediments, nutrients and other pollutants that load downstream water resources. To address these issues, there has been a growth of practices involving Sustainable Drainage Systems (SuDS) for managing stormwater runoff quantity and quality from urban areas. For example, this involves the application of attenuation ponds, and wetlands which temporarily store urban stormwater runoff, thereby reducing the sediment loads, pollutants, and release of peak flows to the downstream water resources at flow rates that mimic the pre-development flow patterns. This practice is gaining momentum in South African urban areas, which are supported by the policies and legislation set up by local authorities to address stormwater management. However, these stormwater application practices often do not perform according to their design capacities because they get filled with sediments and their effectiveness in attenuating peak flows is reduced. Therefore, it is important to reduce sediments coming into these structures by applying sediment traps and basins located at the head of such structures. The sediment trap’s main function is to slow down the stormwater runoff and help in the reduction of sediments before stormwater runoff is discharged out of the construction site and other disturbed areas. The City of Johannesburg Stormwater Management By-laws and Stormwater Design Manual have limited information for the management of sediment using sediment traps and basins and which parameters need to be considered when sizing sediment traps. Therefore, the main aim of the current research was to determine the parameters that should be considered when sizing sediment traps specifically for the city of Johannesburg. The following parameters: design rainfall, daily rainfall, catchment area, evaporation, land cover and land use, percentage of permeable and impermeable areas, topographical data, peak flow, runoff volume, catchment topography, soil types and infiltration characteristics, sediment particle size distribution, sediment settling velocity, sediment loading rate/yield were modelled through Personal Computer Stormwater Management Model (PCSWMM), ArcSWAT ArcGIS, and Excel Spreadsheet Models. Further, the sensitivity analysis was undertaken using different values of imperviousness and infiltration rates while observing peak flow and runoff volume changes in PCSWMM outputs. Modelling in PCSWMM showed that peak flows and runoff volumes increased due to an increase in the values of the imperviousness used. However, the range of infiltration rates for the soils in both sub- catchments S22 and S23 did not change the peak flows and runoff volumes. Though it was not the scope of the current study, it was observed that higher infiltration rates than the ones that were determined from the sub-catchments S22 and S23 indeed reduced peak flows and runoff volumes. On the other hand, particle settling velocity showed that gravel particles took a short time to settle and required a smaller sediment trap iii storage capacity. In comparison, silt particles took longer to settle and required a larger sediment trap storage capacity. Lastly, sediment yield from both sub-catchments S22 and S23 showed that sediment yield is driven by rainfall, whereby months with high rainfall had higher sediment yield than the months with low rainfall. It is therefore, concluded that the following parameters: design rainfall, daily rainfall, evaporation, land cover and land use, percentage of permeable and impermeable areas, topographical data, contributing catchment area, peak flow, runoff volume, catchment topography, soil types and infiltration characteristics, sediment particle size distribution, sediment settling velocity, sediment loading yield should be considered by the engineers, designers and planners when sizing sediment traps in the City of Johannesburg and possibly in other places as well.
The Impact of South Africa’s Response to Informal Settlements and Affordable Housing Development when compared to the responses adopted in Brazil and India
(University of the Witwatersrand, Johannesburg, 2024) Mlotsa, Cebile; Biyela, Precious
In South Africa, informal settlements are prevalent in all the major urban centers, including some long-established informal settlements, such as ones within Alexandria township in the City of Johannesburg, Nyanga in the City of Cape Town and Kennedy Road in the City of eThekwini. New informal settlements are continuing to develop across South Africa’s urban centers. Various policies and interventions have been implemented to address this phenomena. This study aimed to investigate the impact and effectiveness of South Africa’s policies and interventions on informal settlements and compared them to policies and interventions of India Brazil. The study begins with a literature review of the policies and strategies of the three countries alongside best practices recommended by international organizations such as UN-Habitat and the World Bank. The effectiveness of the policies was assessed, and the general issues that affect informal settlements globally were identified. Research questions were formulated based on the literature review to gain further insights into South Africa's response strategies. Semi-structured Interviews were conducted with three professionals working in organizations addressing informal settlements across different provinces, focusing on current strategies, their impact and effectiveness, and potential improvements. A field visit to Mahlakong informal settlement in Limpopo was also carried out which included interviews with two residents to understand challenges and interventions underway to address them. The study found some progressive policies and strategies underway in South Africa, such as the strong emphasis on participation and approval by residents of informal settlements when interventions are carried out, and incremental construction of infrastructure in informal settlements. The study also identified areas that if addressed can improve South Africa’s response to informal settlements, such as recognizing multi-storey inner city buildings as informal settlements, encouraging private developers to invest in affordable housing development, and diversifying tenure legalization option.
An assessment of the necessity of implementing a blockchain based land registry in South Africa
(University of the Witwatersrand, Johannesburg, 2024) Jeram, Deelan; Saghatforoush, Ehsan; Azasu, Samuel
Background statement: Several nations have recently implemented blockchain-based land management systems, focusing on land registration, titling, recordation, and information management, to enhance transparency, trust, data security, data quality, and immutability through consensus mechanisms. This technology streamlines access and tracking of land records, reducing fraud, corruption, record manipulation, and property resale while lowering transaction costs. These advantages aim to address issues of inefficient and untrustworthy land records in less developed countries. Problem: South Africa faces challenges, ranking 108 out of 190 in property registration according to the World Bank, with lengthy procedures (7), extended transaction times (23 days), and high costs (8% of property value). In contrast, blockchain-adopting countries like Sweden and Georgia are ranked at 9 and 5, respectively. Despite these inefficiencies blockchain technology has not yet made an inroad into the land registration or transaction process. Aim – The aim of this study is to investigate the potential use of blockchain technology to digitize land registration in South Africa. Methods: This paper investigates a blockchain property registry pilot project in Khayelitsha, South Africa, using Peled's theoretical framework and employs qualitative research methodologies, including case study analysis and expert interviews, supplemented by a systematic literature review. Outcomes: The study reveals significant challenges in South Africa's land registration, including unreliable land records, informal land tenure systems, limited access for marginalized communities, corruption, weak legal frameworks, post-colonial property rights legacy, and inefficient real estate transactions. Despite the promise of blockchain, these issues persist, hindering progress. Eight key factors obstruct blockchain adoption in South Africa's land registry, including legal barriers, organizational resistance, technological hurdles, resource constraints, political and social factors, and trust-related issues. The case study identifies additional obstacles, such as misalignment of interests, lack of formal agreements, data quality issues, and further legal barriers. Nonetheless, the pilot project managed to create a "pseudo title deed" with potential benefits for the city. This study suggests the application of blockchain in state-subsidized housing developments to enhance data security and enable electronic land transactions. It emphasizes the need for a combination of expertise, infrastructure readiness, and procedural changes to facilitate innovation in the public sector. Despite the potential, the study concludes that South Africa's land registry is not yet prepared for widespread blockchain implementation, citing legal, technological, and organizational challenges. Significance: This research is the first to explore the limited adoption of blockchain technology for land registration in South Africa, contributing valuable insights to the field. This paper identifies critical factors for successful blockchain-based property registry implementation, offering insights for legislation, policy development, and land registration system design to address inequalities and improve land tenure in developing countries. It outlines a potential path for South Africa's Deeds Registry to implement blockchain technology in state-subsidized housing developments
The dynamics of place branding in Johannesburg: 1994 - 2019
(University of the Witwatersrand, Johannesburg, 2024) Mbinza, Zenzile; Sihlongonyane, Mfaniseni Fana
This PhD thesis lays the ground for understanding place branding processes from cities of the Global South. It critically explores place branding as an emerging mechanism for urban governance in Johannesburg. It is critical because place branding and its related processes have increasingly gained momentum in countries, regions and cities jostling for niche status in global economics. This thesis explores the different place brands that Johannesburg coined over time, focussing on the period between 1994 and 2019. It explored the city’s place brands under the five mayors that presided over Johannesburg, beginning with Dan Pretorius (1994 – 1995), Isaac Mogase (1995 – 1999), Amos Masondo (2000 – 2011), Parks Tau (2011 – 2016) and Herman Mashaba (2016 – 2019). The thesis employed a qualitative research methodology and case study design. Primary data Archival research and interviews were the primary data collection strategies. The ensuing discussion of place brands in Johannesburg reveals the dynamics and push factors that have contributed to the development of place brands under the time in question. Politics, economics, and activities related to globalisation emerged as leading drivers for the city of Johannesburg to develop its various place brands. The thesis found that Johannesburg followed a template similar to the cities of the Global North in its application of place branding. However, the thesis also found gaps in the city’s place branding processes. For example, there was limited engagement with the city residents when developing Johannesburg’s place brands. It pointed to a unilateral, top-down application of place branding in the city, which precluded it from using these processes as democracy-building tools. It necessitates the exploration of place branding from the perspective of city governments to begin encompassing issues of inclusivity and public participation. In this light, the thesis calls for a more strategic application of place branding in the Johannesburg.
Understanding the Contribution of Informal Non-State Actors in the Governance of Cities of the Global South through Informal Institutions: The Case Study of Informal Car Guarding in Johannesburg, South Africa
(University of the Witwatersrand, Johannesburg, 2024) Monakedi, Tshepo Albia; Karam, Aly
The re-emergence of coproduction to explain service delivery initiatives by ordinary citizens has transcended different scholarship disciplines, including urban planning. The governance of cities of the global South is characterised by coproduction initiatives that are either unnoticed, overlooked or disregarded because they occur outside the formal institutions of the State. This thesis uses the case study of informal car guarding in Johannesburg, South Africa, to highlight the coproduction contribution of informal non- state actors in the governance of cities of the global South, thus arguing for urban theory and policy agenda that is informed by the realities of the global South. This thesis makes an original contribution to knowledge by arguing for the scope of non- state actor coproduction in governance to include informal non-state actors. Moreover, the idea is part of the scholarship to understand informality as a site of critical analysis thus moving beyond seeing informality as a function of people experiencing poverty. Informality in cities of the global South must be broader than livelihood debates or housing needs for the needy. Studies must be comprehensive and acknowledge the contribution of informality to how the cities function. In addition to the original contribution, this study generated empirical data about informal car guarding, which still needs to be studied further. The data was generated using in- depth interviews, which were largely unstructured, and participant observation. In total, 75 respondents informed this thesis across four study sites in Johannesburg: Maboneng Precinct, Maponya Mall, Parktown Office Park and Noord central business district. The study sites are representative of the localities typically associated with informal car guards in cities of the global South. Twenty themes were generated to answer the research sub-questions. The findings of the thesis are wide-ranging, pointing to the contribution of informal non-state actors and associated challenges. Notably, the idea outlines several policy recommendations for urban planning and urges cities of the global South to understand the contribution of informal non-state actors considering the Sustainable Development Goals (SDG Eleven (11) Sustainable Cities and Communities, SDG One (1) No Poverty and SDG Two (2) iii Zero Hunger). SDG 11 is about access and inclusion for informal non-state actors, and SDGs 1 and 2 are critical for the livelihoods of those in the informal secto
Place leadership for the governance of complex urban agglomerations
(University of the Witwatersrand, Johannesburg, 2024) Naicker, Thilgavathie; Harrison, Philip
City-regions are complex agglomerations – spatially, economically, and politically. Understanding the dynamics and mechanisms that create the foundation for their development is an important undertaking in the face of rising globalisation, urbanisation, migration, and climate change. This research explores the concept of place leadership and its relevance for a complex space like the Gauteng City-Region (GCR). Place leadership is a concept that has been studied extensively in the global North and proposes the rise of leaders across local spaces. The city- region is a dynamic space of contested politics, coalition governments, diffuse power, differing agendas, fragmented, and silo planning and a deeply rooted socio-economic history that has left a lasting impact of inequality. Building a globally competitive city-region has been on the Gauteng Provincial Government’s agenda since the mid-2000s. The city-region argument in Gauteng, South Africa, still lingers, but party politics, differing agendas, the complexities of governance in the city-region, and frequent changes in leadership have prevented the vision from being achieved. The research question of this thesis is: How may the emerging concept of place leadership be applied in the complex, dynamic, and low-trust environment of the GCR? The thesis explores three thematics to analyse place leadership – temporality, crisis, and trans-scalarity. Gauteng, a city-region in South Africa, was examined as a case study. Water governance and the COVID-19 crisis were utilised as lenses to examine place leadership in the GCR. The exploratory mixed-methods study used semi-structured interviews with leaders from political, government administration, academia, and the water sector in Gauteng. A set of questions designed to explore a thematic on leadership and governance was also included in an established broad survey done in the city-region by the Gauteng City-Region Observatory, the Quality-of-LifeVI 2020/21. The outcomes of this quantitative element were analysed by performing cross-tabulations across other thematics, including trust, corruption, participatory governance, and demographic data, to draw conclusions. The interviews were assessed and analysed across the themes of temporality, crisis, and trans-scalarity through the lenses of COVID-19 and water.
Urban design coding: A Qualitative Study into the Relevance of Urban Design Coding in Informal Settlements: The Case of Mushroomville Settlement, Centurion, Pretoria, South Africa
(University of the Witwatersrand, Johannesburg, 2024) Donga-Matambo, Thandeka; Msingaphantsi, Mawabo
In the year 1994, South Africa saw the end of Apartheid and the beginning of a new democratic era. The African National Congress (ANC) came into power and adopted neoliberal policies that favor capitalism, entrepreneurship, a free-market economy and the privatization of some economic sectors. This approach benefited and provided resources to a handful of people at the cost of many – the rich became richer, and the poor became poorer. Today, the commodification of all aspects of life has forced the “urban poor” who cannot afford the city lifestyle to turn to informal means in order to be closer to socio-economic opportunities. Informal settlements have become a major concern to capitalists because they affect investors’ perception of an area and reduce the value of surrounding properties. For a long time, the government’s response to informal settlements has either been to upgrade the settlements in their current location or to evict the residents and relocate them on the urban periphery, far from opportunities, services, facilities and institutions. Unfortunately, the government’s efforts have resulted in the further marginalization and segregation of the poor. This research aims to assess the extent to which urban design codes can be used to redevelop informal settlements into livable, good quality human settlements that are stitched into their existing urban fabric. The Mushroomville Informal Settlement in Centurion, Pretoria will be used as a case study. The research will use qualitative research methods to achieve the set aims. The primary sources of data will include site visits, photography, interviews with an attorney and the informal settlement residents as well as observations of the residents within their natural setting. The secondary data will be sourced through desktop research on site-related court cases, newspaper articles, policies, precedents and other relevant literature. It is expected that the research findings will show that urban design codes can be a useful instrument in redeveloping informal settlements into livable settlements with good quality housing.
Exhumation of forgotten souls: Indigenous knowledge systems and sustainable design approach to Patlong Village Relocation and place of memory
(University of the Witwatersrand, Johannesburg, 2024) Matlanyane, Samson Matlokotsi; Matsipa, Mpho
Since the 1940s, rapidly increasing demand for green energy globally along with water supply demands in growing urban areas have led to de- velopment of hydropower dams and reservoirs at an unprecedented scale across the globe. Although hydro facilities are a relatively clean energy, they have environmental and social impact at country, basin, and regional levels. At country level, construction of these mega hydro-projects comes at a great cost to directly affected communities as they cause involuntary dis- placement, lose of rangelands and means of sustaining livelihood in gener- al. Furthermore, existing social links are broken leaving indigenous knowl- edge systems at risk of erasure. Lastly, affected communities are usually undercompensated, relocated, and hosted in other villages or moved to new designated settlements where resources are already limited thus causing a further strain on such resources. Not only do said hydro-projects have negative impacts in their respective countries, unsustainable management of river flows and unequal use of the Basin’s water lead to conflicts between riparian states. Environmen- tally, damming of valleys negatively affect fauna and flora upstream by flooding and inadequate water downstream. The Lesotho Highlands wa- ter, a 4 phased bilateral agreement between Republic of South Africa and Kingdom of Lesotho is no exception to these negative impacts. This research Report investigated how indigenous knowledge of material and social culture can inform new relocation stratergies which will help anchor a newly developed village. Through recording of oral and literary history, mapping, and conducting semi-structured interviews at Patlong, an understanding of the community’s current livelihood was established. Based on the author’s findings, an Architectural intervention in a form of a settlement anchored by an agricultural skills development centre, a seed bank and a commercial retail node was proposed to ensure a sustainable relocation strategy.
Cultural memories and place-identity: a case study of Syrian refugees’ resettlement and acculturation strategies in Egypt
(University of the Witwatersrand, Johannesburg, 2024) Fahmy, Randa; Elleh, Nnamdi
Focusing on the Syrian refugees in Egypt—the aftermath of the 2011 public uprising, and the so called “Arab Spring”, or the “Jasmine Revolution”—this thesis explores the interaction of four main social factors influencing Syrian refugees place identity in the host country, Egypt. The first factor is the circumstances that caused the displacement of Syrians to become refugees in Egypt. The second factor is the refugees’ production of architectonic elements in the host country that are ideologically presumed to be ‘authentic’ architectural cultural heritage from their homeland. The presumed authentic architectural culture manifests as territorialisation in the host country for the protection of Syrian refugees’ identity. The third factor is the ‘globalisation’ forces that blend commercially inspired diverse trendy architectural styles into universal interchangeable consumables while ignoring contextual and cultural specificity. The fourth factor is the elucidation of what was realised when the three factors—the refugees, presumed authentic architectural culture, and globalisation forces—come together in the host country. Preliminary studies suggest that Syrian refugees maintain interactive tensions among the perceived original homeland architectural cultural identity, globalisation forces, and the necessity to modify the presumed original culture to adjust and settle in the host country. Examining the intersections of these four factors is the topic of this thesis. It is also observed that refugees tend to conceptualise authentic heritage ideology in placemaking to maintain an assumed cultural- identity in these globalising times of displacements and movements. Thus, in the effort to realise the assumed authentic architectural cultural heritage in the host country, Syrian refugees’ placemaking in Egypt defaults into another form of territorialisation that is inspired by architectural cultural memories from their homeland. Territorialisation disaggregates, personalises, and distorts the image of cultural identity of the places where refugees dream to be because it motivates them to be distinguished from their host culture while at the same time seeking to assimilate into the host country. This irony and the conflict of wanting to belong to the host country but, at the same time, wanting to be separate by retaining their Syrian identity, is the core of the study. Also, this thesis uses the architectural production of Syrian refugees in the host land, Egypt, in examining how architectural cultural memories are used for recreating personalised places of displaced groups. It is observed that the refugees present the personalized new creations in the host country as their “authentic” architectural culture purely on ideological bases.

Faculty of Engineering and the Built Environment (ETDs)

Browse

Filters

Settings

Sort By

Results per page

Search Results