Status and potential of green infrastructure to support urban resilience in Zomba City, Malawi
- Authors: Likongwe, Patrick Jeremy
- Date: 2023-10-13
- Subjects: Biodiversity , Ecosystem services Malawi Zomba District , Green space , Land use Malawi Zomba District , Land cover Malawi Zomba District , Social ecology , Sustainability , Urban resilience , Trees Variation
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/431821 , vital:72806 , DOI 10.21504/10962/431821
- Description: Small and medium towns with less than one million inhabitants are regarded to be the fastest growing urban centres globally, absorbing the bulk of the urban population growth. This urban growth drives the diminishing natural capital within the urban settings, resulting in compromised ecosystem services delivery, thereby rendering urban dwellers and systems less resilient to hazards and shocks. It is known that urban resilience discourse is rooted in robust, empirical assessments of the nature, composition and distribution of urban green infrastructure. Using the concept of green infrastructure, a mechanism for the delivery of ecosystem services that are multi-functional, well connected, and that integrate the grey-green infrastructure while providing room for social inclusion, anchored the research in a small city of Zomba, Malawi, which is a fast-growing city facing natural resource and ecosystem service degradation. The research therefore was set to understand the status of urban green infrastructure in Zomba over space and time as the basis for enhancing urban resilience. This was facilitated by an understanding of the spatial and temporal quantity, quality, diversity and distribution of urban greenspaces and the composition, structure, diversity and distributional differences of urban trees within different urban greenspace classes. Further to this was an investigation on the perceptions of and preferences for urban greenspaces among the different socio-demographic groups and finally the role of residents, institutions and institutional frameworks in building urban resilience through the delivery of ecosystem services. To achieve these objectives, the study used a suite of methods. First was geographical information system and remote sensing to understand the spatial and temporal changes in greenspaces within the city in terms of quantity and distribution. Ecological methods of assessing the tree species composition, diversity, population structure and distribution were also employed. To gauge the perceptions of and preferences for urban greenspaces, a survey was done, targeting users found within the urban greenspaces plus residents that claimed to have patronised the urban greenspaces. Finally, to understand the role of nature and the relevant urban ecosystem services provided towards building urban resilience, remote sensing and key informant interviews were done to enrich the literature searches on a case study of urban community efforts involved in managing Sadzi hill to reverse ecosystem disservices versus Chiperoni hill that was not managed. A general impression of declining urban green infrastructure was verified through the study. The city has indeed lost 14 % tree cover between 1998 and 2018 due to increased housing and creation of agricultural land to support the growing urban population. The city has 168 tree species with 65 % of them being indigenous. Residential areas were dominated by exotic trees, mainly due to the abundance of exotic fruit trees like Mangifera indica. Generally, the city has a good tree diversity score but unequally distributed, with the formal residential areas, where the colonial masters settled, having more trees than the mixed and informal residential areas. Nine urban greenspace types were identified, but there was a low per capita urban greenspace area of 11.6 m2 per person, slightly above the minimum standard set by World Health Organisation. From the preferences for and perceptions of urban greenspaces, patronage to these greenspaces (treated as parks) was highest among the educated youth, a majority being from the high housing density areas where there are no urban parks. Walking to the nearest urban greenspace took more than 10 minutes for 85 % of the respondents. With the available by-laws in support for the governance of greenspaces within the city and the role of residents towards the same, restoration efforts that targeted Sadzi hill yielded positive results through reversing ecosystem disservices that were being experienced by the community members around the hill. The community enjoys several ecosystem services that have also contributed towards building their resilience to climatic and environmental hazards. The results of this study have unveiled several green infrastructure attributes that can contribute towards building urban social ecological resilience like the presence of high proportion of indigenous tree species, healthy urban forest, high proportion of fruit trees, high diversity scores, unparalleled demand for urban greenspaces for cultural and regulatory ecosystem services, the willingness to pay and work towards managing and conserving greenspaces and the social capital available from the urban communities. However, the study also unveiled several green infrastructure related attributes that if not checked will continue to undermine efforts towards building urban resilience. These included the continued drop in tree and greenspace cover, poor governance of the available public greenspaces, unequal distribution of trees and urban greenspaces, poor management of greenspaces, bare river banks, lack of park amenities and a lack of a clear strategy, policy or an urban plan that clearly outlines green infrastructure. Efforts towards addressing these will mean acknowledging the role of green infrastructure in supporting urban social ecological resilience. , Thesis (PhD) -- Faculty of Science, Environmental Science, 2023
- Full Text:
- Date Issued: 2023-10-13
- Authors: Likongwe, Patrick Jeremy
- Date: 2023-10-13
- Subjects: Biodiversity , Ecosystem services Malawi Zomba District , Green space , Land use Malawi Zomba District , Land cover Malawi Zomba District , Social ecology , Sustainability , Urban resilience , Trees Variation
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/431821 , vital:72806 , DOI 10.21504/10962/431821
- Description: Small and medium towns with less than one million inhabitants are regarded to be the fastest growing urban centres globally, absorbing the bulk of the urban population growth. This urban growth drives the diminishing natural capital within the urban settings, resulting in compromised ecosystem services delivery, thereby rendering urban dwellers and systems less resilient to hazards and shocks. It is known that urban resilience discourse is rooted in robust, empirical assessments of the nature, composition and distribution of urban green infrastructure. Using the concept of green infrastructure, a mechanism for the delivery of ecosystem services that are multi-functional, well connected, and that integrate the grey-green infrastructure while providing room for social inclusion, anchored the research in a small city of Zomba, Malawi, which is a fast-growing city facing natural resource and ecosystem service degradation. The research therefore was set to understand the status of urban green infrastructure in Zomba over space and time as the basis for enhancing urban resilience. This was facilitated by an understanding of the spatial and temporal quantity, quality, diversity and distribution of urban greenspaces and the composition, structure, diversity and distributional differences of urban trees within different urban greenspace classes. Further to this was an investigation on the perceptions of and preferences for urban greenspaces among the different socio-demographic groups and finally the role of residents, institutions and institutional frameworks in building urban resilience through the delivery of ecosystem services. To achieve these objectives, the study used a suite of methods. First was geographical information system and remote sensing to understand the spatial and temporal changes in greenspaces within the city in terms of quantity and distribution. Ecological methods of assessing the tree species composition, diversity, population structure and distribution were also employed. To gauge the perceptions of and preferences for urban greenspaces, a survey was done, targeting users found within the urban greenspaces plus residents that claimed to have patronised the urban greenspaces. Finally, to understand the role of nature and the relevant urban ecosystem services provided towards building urban resilience, remote sensing and key informant interviews were done to enrich the literature searches on a case study of urban community efforts involved in managing Sadzi hill to reverse ecosystem disservices versus Chiperoni hill that was not managed. A general impression of declining urban green infrastructure was verified through the study. The city has indeed lost 14 % tree cover between 1998 and 2018 due to increased housing and creation of agricultural land to support the growing urban population. The city has 168 tree species with 65 % of them being indigenous. Residential areas were dominated by exotic trees, mainly due to the abundance of exotic fruit trees like Mangifera indica. Generally, the city has a good tree diversity score but unequally distributed, with the formal residential areas, where the colonial masters settled, having more trees than the mixed and informal residential areas. Nine urban greenspace types were identified, but there was a low per capita urban greenspace area of 11.6 m2 per person, slightly above the minimum standard set by World Health Organisation. From the preferences for and perceptions of urban greenspaces, patronage to these greenspaces (treated as parks) was highest among the educated youth, a majority being from the high housing density areas where there are no urban parks. Walking to the nearest urban greenspace took more than 10 minutes for 85 % of the respondents. With the available by-laws in support for the governance of greenspaces within the city and the role of residents towards the same, restoration efforts that targeted Sadzi hill yielded positive results through reversing ecosystem disservices that were being experienced by the community members around the hill. The community enjoys several ecosystem services that have also contributed towards building their resilience to climatic and environmental hazards. The results of this study have unveiled several green infrastructure attributes that can contribute towards building urban social ecological resilience like the presence of high proportion of indigenous tree species, healthy urban forest, high proportion of fruit trees, high diversity scores, unparalleled demand for urban greenspaces for cultural and regulatory ecosystem services, the willingness to pay and work towards managing and conserving greenspaces and the social capital available from the urban communities. However, the study also unveiled several green infrastructure related attributes that if not checked will continue to undermine efforts towards building urban resilience. These included the continued drop in tree and greenspace cover, poor governance of the available public greenspaces, unequal distribution of trees and urban greenspaces, poor management of greenspaces, bare river banks, lack of park amenities and a lack of a clear strategy, policy or an urban plan that clearly outlines green infrastructure. Efforts towards addressing these will mean acknowledging the role of green infrastructure in supporting urban social ecological resilience. , Thesis (PhD) -- Faculty of Science, Environmental Science, 2023
- Full Text:
- Date Issued: 2023-10-13
An analysis of the employability of civil engineering graduate technicians
- Authors: Ikudayisi, Akinola Mayowa
- Date: 2021-04
- Subjects: Job hunting , Career development , Labor market
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51578 , vital:43312
- Description: In South Africa, a severe shortage of professional engineers exists compared to the international benchmark of an average population per engineer. This shortage is one of the major causes of poor service and utility delivery at the municipal level. In addition, there is an insufficient number of competent engineers available for ongoing projects. Hence, there is a critical shortage of experienced, engineering professionals, particularly mid-career engineers to be responsible for production works. As a result, Universities of Technology (UoT) were tasked and authorised to train engineering professionals. From research, it was discovered that most of the Civil Engineering Graduate Technicians (CEGT) failed to acquire and develop relevant and essential industry skills during their engineering programme. This makes it difficult for them to be employed in the engineering workplaces. The departments of civil engineering in some South African universities have not evaluated the quality of the education of their CEGT and their employability to work in the engineering industry. This research therefore aims to measure the employability and quality of education of Civil Engineering Graduate Technicians from some South African universities by investigating the experiences of civil engineering alumni and employers of graduates in the engineering industry. This is to determine if the graduate technicians are provided and equipped with relevant industry competencies and skills set to meet the industry’s expectation. An online survey which contains 89 closed-ended questions was designed to allow alumni and their employers assess the standard of education of graduates and industry competence acquired during their engineering programmes. The Universal Resource Link (URL) to the online questionnaire was sent to a sample of 600 respondents using a web-based survey approach. Only seventeen percent of the targeted population completed the survey and that makes 102 respondents in this study. A conceptual model that measures the employability of Civil Engineering Graduate Technicians was also developed. The data gathered was statistically analysed. Varying descriptive and inferential statistics were explored, such as frequency distributions, central measure, dispersion measure, the Cronbach alpha coefficient test, one-sample t-tests, Cohen’s d, Pearson’s product moment correlation, ANOVA, MANOVA, ranking indices and lastly, Exploratory Factor Analysis (EFA). The EFA was employed to ensure the construct validity of the instrument and to identify items which should be removed. Each of these statistics cumulatively performs an empirical evaluation of the Civil Engineering Graduate Technician employability model. From the result of the data analysis, the hypothesised model identified the following factors as having an influence on the employability of Civil Engineering Graduate Technicians: Knowledge Gained, Academic Staff Teaching, Engineering Design Ability, Individual and Teamwork Ability, Participation of each Student, Infrastructure Provided, Problem Solving Skills, Professional and Technical Communication Skills, Workplace Practices, Encouragement in School and Essentiality of Creativity and Innovation. These eleven independent factors from Cronbach’s Alpha coefficient were all found to possess good internal reliability. They all exert a significant positive effect on employability. Additionally, managerial recommendations, limitations to the study and a call for future research were discussed. If these recommendations are implemented, UoTs and employers in the civil engineering industry should be successful in producing work-ready civil engineering technicians. Having these recommendations implemented is fundamental to creating innovative and skilled technicians and engineers in the engineering industry, who can adapt to market changes. Of the competencies assessed, “Individual and Teamwork ability” received the highest and “Infrastructure provided” the lowest rating. Overall, the results indicate that employers are reasonably satisfied with the competencies of Civil Engineering Graduate Technicians but point to the need for the strengthening of “Engineering design ability”, “Professional and technical communication skills” and “Infrastructure provided” competencies within the curriculum of the Diploma programme. , Thesis (MBA) -- Faculty of Business and Economic Sciences, Business Administration, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Ikudayisi, Akinola Mayowa
- Date: 2021-04
- Subjects: Job hunting , Career development , Labor market
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51578 , vital:43312
- Description: In South Africa, a severe shortage of professional engineers exists compared to the international benchmark of an average population per engineer. This shortage is one of the major causes of poor service and utility delivery at the municipal level. In addition, there is an insufficient number of competent engineers available for ongoing projects. Hence, there is a critical shortage of experienced, engineering professionals, particularly mid-career engineers to be responsible for production works. As a result, Universities of Technology (UoT) were tasked and authorised to train engineering professionals. From research, it was discovered that most of the Civil Engineering Graduate Technicians (CEGT) failed to acquire and develop relevant and essential industry skills during their engineering programme. This makes it difficult for them to be employed in the engineering workplaces. The departments of civil engineering in some South African universities have not evaluated the quality of the education of their CEGT and their employability to work in the engineering industry. This research therefore aims to measure the employability and quality of education of Civil Engineering Graduate Technicians from some South African universities by investigating the experiences of civil engineering alumni and employers of graduates in the engineering industry. This is to determine if the graduate technicians are provided and equipped with relevant industry competencies and skills set to meet the industry’s expectation. An online survey which contains 89 closed-ended questions was designed to allow alumni and their employers assess the standard of education of graduates and industry competence acquired during their engineering programmes. The Universal Resource Link (URL) to the online questionnaire was sent to a sample of 600 respondents using a web-based survey approach. Only seventeen percent of the targeted population completed the survey and that makes 102 respondents in this study. A conceptual model that measures the employability of Civil Engineering Graduate Technicians was also developed. The data gathered was statistically analysed. Varying descriptive and inferential statistics were explored, such as frequency distributions, central measure, dispersion measure, the Cronbach alpha coefficient test, one-sample t-tests, Cohen’s d, Pearson’s product moment correlation, ANOVA, MANOVA, ranking indices and lastly, Exploratory Factor Analysis (EFA). The EFA was employed to ensure the construct validity of the instrument and to identify items which should be removed. Each of these statistics cumulatively performs an empirical evaluation of the Civil Engineering Graduate Technician employability model. From the result of the data analysis, the hypothesised model identified the following factors as having an influence on the employability of Civil Engineering Graduate Technicians: Knowledge Gained, Academic Staff Teaching, Engineering Design Ability, Individual and Teamwork Ability, Participation of each Student, Infrastructure Provided, Problem Solving Skills, Professional and Technical Communication Skills, Workplace Practices, Encouragement in School and Essentiality of Creativity and Innovation. These eleven independent factors from Cronbach’s Alpha coefficient were all found to possess good internal reliability. They all exert a significant positive effect on employability. Additionally, managerial recommendations, limitations to the study and a call for future research were discussed. If these recommendations are implemented, UoTs and employers in the civil engineering industry should be successful in producing work-ready civil engineering technicians. Having these recommendations implemented is fundamental to creating innovative and skilled technicians and engineers in the engineering industry, who can adapt to market changes. Of the competencies assessed, “Individual and Teamwork ability” received the highest and “Infrastructure provided” the lowest rating. Overall, the results indicate that employers are reasonably satisfied with the competencies of Civil Engineering Graduate Technicians but point to the need for the strengthening of “Engineering design ability”, “Professional and technical communication skills” and “Infrastructure provided” competencies within the curriculum of the Diploma programme. , Thesis (MBA) -- Faculty of Business and Economic Sciences, Business Administration, 2021
- Full Text:
- Date Issued: 2021-04
Design of immunosensor for the detection of C-reactive protein using oriented antibody immobilization
- Authors: Adesina, Abiola Olanike
- Date: 2020
- Subjects: Uncatalogued
- Language: English
- Type: thesis , text , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/163080 , vital:41010 , https://dx.doi.org/10.21504/10962/163080
- Description: Thesis (PhD)--Rhodes University, Science Faculty, Department of Chemistry, 2020.
- Full Text:
- Date Issued: 2020
- Authors: Adesina, Abiola Olanike
- Date: 2020
- Subjects: Uncatalogued
- Language: English
- Type: thesis , text , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/163080 , vital:41010 , https://dx.doi.org/10.21504/10962/163080
- Description: Thesis (PhD)--Rhodes University, Science Faculty, Department of Chemistry, 2020.
- Full Text:
- Date Issued: 2020
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