Ecological infrastructure importance for drought mitigation in rural South African catchments: the Cacadu Catchment case example
- Authors: Xoxo, Beauten Sinetemba
- Date: 2021-10
- Subjects: Sustainable Development Goals , Water security South Africa , Remote sensing , Watershed restoration South Africa , Restoration ecology South Africa , Ecosystem services South Africa , SDG 15.3.1
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/191203 , vital:45070
- Description: Water scarcity is recognised as one of the significant challenges facing many countries, including South Africa. The threat of water scarcity is exacerbated by the coupled impacts of climate and anthropogenic drivers. Ongoing droughts and continued land cover change and degradation influence the ability of catchments to partition rainwater runoff, thereby affecting streamflow returns. However, quantifying land degradation accurately remains a challenge. This thesis used the theoretical lens of investing in ecological infrastructure to improve the drought mitigation function in rural catchments. This theoretical framework allows for a social-ecological systems approach to understand and facilitate science-based strategies for promoting ecosystem recovery. Specifically, this study aimed to explore the role and benefit of ecological infrastructure for improving drought mitigation, and consequently, water security for rural communities. Thus, this study sought to assess the consequences of human actions to catchment health status using the 15th Sustainable Development Goal indicator for the proportion of degraded land over the total land area as a surrogate. Secondly, hydrological modelling was used to describe how different land covers influence catchment hydrology, which related to how ecological infrastructure enables drought risk-reduction for mitigation regulation. Finally, this study developed a spatial prioritisation plan for restoration to improve drought mitigation for four focal ecological infrastructure (EI) categories (i.e. wetlands, riparian margins, abandoned agricultural fields and grasslands). The focal EI categories were selected for their importance in delivering water-related ecosystem services when sustainably managed. Chapter 1 sets the scene (i.e. provides the study background) and Chapter 2 provides a review of the literature. In Chapter 3, the recently released global GIS toolbox (TRENDS.EARTH) was used for tracking land change and for assessing the SDG 15.3.1 degradation indicator of i.e. Cacadu catchment over 15 years at a 300 m resolution. The results showed a declining trend in biomass productivity within the Cacadu catchment led to moderate degradation, with 16.79% of the total landscape degraded, which was determined by the pugin using the one-out, all-out rule. The incidence of degradation was detected in middle reaches of the catchment (i.e. S10F-J), while some improvement was detected in upper reaches (S10A-C) and lower reaches (S10J). In Chapter 4, a GIS-based Analytic Hierarchical Process (AHP) based on community stakeholder priorities, open-access spatial datasets and expert opinions, was used to identify EI focal areas that are best suitable for restoration to increase the drought mitigation capacity of the Cacadu catchment. The collected datasets provided three broad criteria (ecosystem health, water provision and social benefit) for establishing the AHP model using 12 spatial attributes. Prioritisation results show that up to 89% of the Cacadu catchment is suitable for restoration to improve drought mitigation. Catchments S10B-D, and S10F, S10G and S10J were highly prioritised while S10A, S10E and S10H received low priority, due to improving environmental conditions and low hydrological potential. Areas that were prioritised with consideration for local livelihoods overlap the areas for drought mitigation and form a network of villages from the middle to lower catchment reaches. Prioritised restoration areas with a consideration of societal benefit made up 0.56% of wetlands, 4.27% of riparian margins, 92.06% of abandoned croplands, and 51.86% of grasslands. Chapter 5 reports on use of the Pitman groundwater model to help understand the influence of land modification on catchment hydrology, and highlight the role of restoration interventions. The Cacadu catchment is ungauged, therefore the neighbouring Indwe catchment was used for parameter transfer through a spatial regionalisation technique. Results suggest that degradation increases surface runoff and aggravates recharge reduction, thereby reducing streamflow during low flow periods. In areas where there is natural land cover recovery, the Pitman Model simulated similar dry season streamflow to the natural land cover. Combining the outcomes from the three assessments allowed the study to highlight the role and benefits of ecological infrastructure in terms of drought mitigation. Study findings were interpreted to make recommendations for the role and benefit of ecological infrastructure for drought mitigation at a landscape scale and tertiary catchment level, within the context of available management options. The results support the notion that multiple science data sources can promote investments in ecological infrastructure. However, better spatial and temporal resolution datasets at a national level are still needed to improve the accuracy of studies such as the one outlined in this thesis. The study recommends adopting better ecosystem protection approaches and collaborative governance at multiple levels to reduce the vulnerability of rural communities to drought impacts. , Thesis (MSc) -- Faculty of Science, Institute for Water Research, 2021
- Full Text:
- Date Issued: 2021-10
- Authors: Xoxo, Beauten Sinetemba
- Date: 2021-10
- Subjects: Sustainable Development Goals , Water security South Africa , Remote sensing , Watershed restoration South Africa , Restoration ecology South Africa , Ecosystem services South Africa , SDG 15.3.1
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/191203 , vital:45070
- Description: Water scarcity is recognised as one of the significant challenges facing many countries, including South Africa. The threat of water scarcity is exacerbated by the coupled impacts of climate and anthropogenic drivers. Ongoing droughts and continued land cover change and degradation influence the ability of catchments to partition rainwater runoff, thereby affecting streamflow returns. However, quantifying land degradation accurately remains a challenge. This thesis used the theoretical lens of investing in ecological infrastructure to improve the drought mitigation function in rural catchments. This theoretical framework allows for a social-ecological systems approach to understand and facilitate science-based strategies for promoting ecosystem recovery. Specifically, this study aimed to explore the role and benefit of ecological infrastructure for improving drought mitigation, and consequently, water security for rural communities. Thus, this study sought to assess the consequences of human actions to catchment health status using the 15th Sustainable Development Goal indicator for the proportion of degraded land over the total land area as a surrogate. Secondly, hydrological modelling was used to describe how different land covers influence catchment hydrology, which related to how ecological infrastructure enables drought risk-reduction for mitigation regulation. Finally, this study developed a spatial prioritisation plan for restoration to improve drought mitigation for four focal ecological infrastructure (EI) categories (i.e. wetlands, riparian margins, abandoned agricultural fields and grasslands). The focal EI categories were selected for their importance in delivering water-related ecosystem services when sustainably managed. Chapter 1 sets the scene (i.e. provides the study background) and Chapter 2 provides a review of the literature. In Chapter 3, the recently released global GIS toolbox (TRENDS.EARTH) was used for tracking land change and for assessing the SDG 15.3.1 degradation indicator of i.e. Cacadu catchment over 15 years at a 300 m resolution. The results showed a declining trend in biomass productivity within the Cacadu catchment led to moderate degradation, with 16.79% of the total landscape degraded, which was determined by the pugin using the one-out, all-out rule. The incidence of degradation was detected in middle reaches of the catchment (i.e. S10F-J), while some improvement was detected in upper reaches (S10A-C) and lower reaches (S10J). In Chapter 4, a GIS-based Analytic Hierarchical Process (AHP) based on community stakeholder priorities, open-access spatial datasets and expert opinions, was used to identify EI focal areas that are best suitable for restoration to increase the drought mitigation capacity of the Cacadu catchment. The collected datasets provided three broad criteria (ecosystem health, water provision and social benefit) for establishing the AHP model using 12 spatial attributes. Prioritisation results show that up to 89% of the Cacadu catchment is suitable for restoration to improve drought mitigation. Catchments S10B-D, and S10F, S10G and S10J were highly prioritised while S10A, S10E and S10H received low priority, due to improving environmental conditions and low hydrological potential. Areas that were prioritised with consideration for local livelihoods overlap the areas for drought mitigation and form a network of villages from the middle to lower catchment reaches. Prioritised restoration areas with a consideration of societal benefit made up 0.56% of wetlands, 4.27% of riparian margins, 92.06% of abandoned croplands, and 51.86% of grasslands. Chapter 5 reports on use of the Pitman groundwater model to help understand the influence of land modification on catchment hydrology, and highlight the role of restoration interventions. The Cacadu catchment is ungauged, therefore the neighbouring Indwe catchment was used for parameter transfer through a spatial regionalisation technique. Results suggest that degradation increases surface runoff and aggravates recharge reduction, thereby reducing streamflow during low flow periods. In areas where there is natural land cover recovery, the Pitman Model simulated similar dry season streamflow to the natural land cover. Combining the outcomes from the three assessments allowed the study to highlight the role and benefits of ecological infrastructure in terms of drought mitigation. Study findings were interpreted to make recommendations for the role and benefit of ecological infrastructure for drought mitigation at a landscape scale and tertiary catchment level, within the context of available management options. The results support the notion that multiple science data sources can promote investments in ecological infrastructure. However, better spatial and temporal resolution datasets at a national level are still needed to improve the accuracy of studies such as the one outlined in this thesis. The study recommends adopting better ecosystem protection approaches and collaborative governance at multiple levels to reduce the vulnerability of rural communities to drought impacts. , Thesis (MSc) -- Faculty of Science, Institute for Water Research, 2021
- Full Text:
- Date Issued: 2021-10
School managers as catalysts of innovative culture and academic performance: A case of selected schools in the Cofimvaba District in the Eastern Cape Province
- Authors: Langa, Vuyani Goodman
- Date: 2020-02
- Subjects: School management and organization , Organizational change , Management
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20318 , vital:45650
- Description: School managers have always been on the forefront of the administration of education system since they are the active agents who lead their schools towards wider goals of improving access and quality of education. The contemporary world has had a great deal of surmounting pressure from globalisation and other forces of a universalised society. These influences have become more and more pronounced with the inevitable influences of digitalisation and in the fourth industrial revolution. Information and Communication Technologies have transformed how things are done even within the settings of schools. Attempting to ignore this bold revolution for the so-called ‘tried and tested’ conventional methods of school management, assessment, learning, teaching and monitoring does not only leave a school or education system behind but inhibits leaners and stakeholders from enjoying the many benefits of innovation, creativity and flexibility. This study explores the role of school managers in creating and maintaining an innovative culture and academic performance in selected public schools of the Cofimvaba Education District which has become synonymous with declining pass rates post-1994. A qualitative research approach was used where existing literature collected, collated and thematically analysed. The findings of the study indicated that the school principals are not empowered or willing enough to catalyse the creation and sustaining of innovative cultures in schools. There was also a political willingness of the leaders of the education sector in the Cofimvaba Education District is deficient, the absence of sanctions for failure to innovate is a challenge to innovation. Other findings include evidence policy gaps on what is innovation and who must do what in schools which affects the efficacy of school managers. The study also established that the bureaucratisation of the education sector has done nothing by crippled school managers’ ability to innovate by school managers. The study recommends strategies on how school managers can become that active catalyst that they should be, to drive innovation include in-service training and setting minimum benchmarks for school managers eligibility. Also, policy interventions such as 4th industrial revolution aligned innovation regulations, exchange of ideas with countries which successful school innovation formulating a sanction model of non-performers, towards improving access and quality of education in the Cofimvaba Education District. , Thesis (PhD) -- Faculty of Management and Commerce, 2020
- Full Text:
- Date Issued: 2020-02
- Authors: Langa, Vuyani Goodman
- Date: 2020-02
- Subjects: School management and organization , Organizational change , Management
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20318 , vital:45650
- Description: School managers have always been on the forefront of the administration of education system since they are the active agents who lead their schools towards wider goals of improving access and quality of education. The contemporary world has had a great deal of surmounting pressure from globalisation and other forces of a universalised society. These influences have become more and more pronounced with the inevitable influences of digitalisation and in the fourth industrial revolution. Information and Communication Technologies have transformed how things are done even within the settings of schools. Attempting to ignore this bold revolution for the so-called ‘tried and tested’ conventional methods of school management, assessment, learning, teaching and monitoring does not only leave a school or education system behind but inhibits leaners and stakeholders from enjoying the many benefits of innovation, creativity and flexibility. This study explores the role of school managers in creating and maintaining an innovative culture and academic performance in selected public schools of the Cofimvaba Education District which has become synonymous with declining pass rates post-1994. A qualitative research approach was used where existing literature collected, collated and thematically analysed. The findings of the study indicated that the school principals are not empowered or willing enough to catalyse the creation and sustaining of innovative cultures in schools. There was also a political willingness of the leaders of the education sector in the Cofimvaba Education District is deficient, the absence of sanctions for failure to innovate is a challenge to innovation. Other findings include evidence policy gaps on what is innovation and who must do what in schools which affects the efficacy of school managers. The study also established that the bureaucratisation of the education sector has done nothing by crippled school managers’ ability to innovate by school managers. The study recommends strategies on how school managers can become that active catalyst that they should be, to drive innovation include in-service training and setting minimum benchmarks for school managers eligibility. Also, policy interventions such as 4th industrial revolution aligned innovation regulations, exchange of ideas with countries which successful school innovation formulating a sanction model of non-performers, towards improving access and quality of education in the Cofimvaba Education District. , Thesis (PhD) -- Faculty of Management and Commerce, 2020
- Full Text:
- Date Issued: 2020-02
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