Geological and geophysical investigations of groundwater resource in the area of Ndlambe Municipality, Eastern Cape Province, South Africa.
- Authors: Mpofu, Mthulisi
- Date: 2020
- Subjects: Groundwater Geophysical surveys
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: http://hdl.handle.net/10353/18755 , vital:42730
- Description: Groundwater is an essential resource contributing extensively to overall total annual supply. However, overexploitation has depleted groundwater availability significantly and also brought about land subsidence at some places. The evaluation of groundwater potential zones is essential in protecting the quality of water and managing of groundwater structures. The Eastern Cape Province is one of the provinces faced with the challenge of supplying clean fresh water to the communities residing in it. Ndlambe municipality is a case in point where people rely on groundwater for agriculture and domestic activities. Few studies have been undertaken to evaluate groundwater resource in the study area. This study aims to assess groundwater resources as a way of achieving the goal of water sustainability. In the southeast of the Cape Fold Belt (CBF), is the Ndlambe municipality underneath folded Cape and Karoo Supergroup rocks. The rock sequence in the region reflects the geological history over a considerable period. In general, the area of study comprises of the Bokkeveld and Witteberg groups. The Bokkeveld comprises of shale along with sandstone whilst the Witteberg Group consists predominantly of quartzites with minor interbedded shales. The aims of the study were to target potential zones for groundwater exploration, analyse zones of lineaments, investigate the networks of fractures and the mineralogy of the area of study. In line with studies for groundwater exploration, a number of methods were undertaken for obtaining the results. These included literature review, remote sensing and geographic information system, thin section analysis, scanning electron microscope (SEM), X-ray fluorescence (XRF), structural analysis and geophysical investigations (magnetic and vertical electrical sounding). Potential zones for groundwater were identified using remote sensing techniques and geographical information systems (GIS). Maps were generated using GIS tools. Geology, slope, lineaments and Normalised Difference Vegetation Index (NDVI) were considered as parameters for determining groundwater potential zones. A geological and geophysical study was conducted in the Ndlambe municipality. Twelve samples for thin sections, 12 samples for XRF analysis and 4 samples for SEM analysis were collected at different locations in the area of study and were analysed. Thin section analysis revealed that quartz arenite has been metamorphosed to quartzite due to high pressure and temperatures and the cracks in the quartz grains are due to pressure and brittle deformation that has in turn enhanced secondary porosity resulting in joints and fractures which are good for groundwater movement. Scanning electron microscopy complemented the findings from optical microscopy by revealing splatter pores which are due to intense fracturing and these contribute to increasing permeability of the rock structures. XRF revealed the chemical composition of various rock types in the area of study. The analysed samples were dominated by silica reflecting their source from weathering of silicate rocks. The Chemical Index of Alteration (CIA) and Al2O3 values of the analysed samples reflected moderate to intensive weathering. In the study area, three main hydrogeologically important structures were taken into account. These included primary structures (bedding), contacts (geological) and secondary structures like fractures and folds. The study area comprises of several faults that are an important factor for porosity and permeability. The study area is dominated by blocky quartz veins that have been crushed due to compression hence higher permeability of groundwater. The Syscal Pro multichannel resistivity equipment was used to conduct the survey using the Schlumberger- Dipole-dipole array on three lines of varying length (350 m, 530 m and 340 m). Data collected were processed using RES2DINV software, producing a subsurface 2-D geoelectrical model from the pseudosections of apparent resistivity. Low resistivities in the study area were inferred to be weathered moist sandstone while low resistivities with depth indicated an overlying zone of fractured sandstone and quartzite which may be hosting some groundwater. An area of low resistivity zones between two large bodies suggests that the massive rock bodies are being weathered and fractured and fractures act as conduits for groundwater. High resistivity values indicate hard rock bodies that are unweathered hence low potential zone for groundwater localisation. The ground magnetic survey was used to delineate the subsurface structures as these control groundwater potential.
- Full Text:
- Authors: Mpofu, Mthulisi
- Date: 2020
- Subjects: Groundwater Geophysical surveys
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: http://hdl.handle.net/10353/18755 , vital:42730
- Description: Groundwater is an essential resource contributing extensively to overall total annual supply. However, overexploitation has depleted groundwater availability significantly and also brought about land subsidence at some places. The evaluation of groundwater potential zones is essential in protecting the quality of water and managing of groundwater structures. The Eastern Cape Province is one of the provinces faced with the challenge of supplying clean fresh water to the communities residing in it. Ndlambe municipality is a case in point where people rely on groundwater for agriculture and domestic activities. Few studies have been undertaken to evaluate groundwater resource in the study area. This study aims to assess groundwater resources as a way of achieving the goal of water sustainability. In the southeast of the Cape Fold Belt (CBF), is the Ndlambe municipality underneath folded Cape and Karoo Supergroup rocks. The rock sequence in the region reflects the geological history over a considerable period. In general, the area of study comprises of the Bokkeveld and Witteberg groups. The Bokkeveld comprises of shale along with sandstone whilst the Witteberg Group consists predominantly of quartzites with minor interbedded shales. The aims of the study were to target potential zones for groundwater exploration, analyse zones of lineaments, investigate the networks of fractures and the mineralogy of the area of study. In line with studies for groundwater exploration, a number of methods were undertaken for obtaining the results. These included literature review, remote sensing and geographic information system, thin section analysis, scanning electron microscope (SEM), X-ray fluorescence (XRF), structural analysis and geophysical investigations (magnetic and vertical electrical sounding). Potential zones for groundwater were identified using remote sensing techniques and geographical information systems (GIS). Maps were generated using GIS tools. Geology, slope, lineaments and Normalised Difference Vegetation Index (NDVI) were considered as parameters for determining groundwater potential zones. A geological and geophysical study was conducted in the Ndlambe municipality. Twelve samples for thin sections, 12 samples for XRF analysis and 4 samples for SEM analysis were collected at different locations in the area of study and were analysed. Thin section analysis revealed that quartz arenite has been metamorphosed to quartzite due to high pressure and temperatures and the cracks in the quartz grains are due to pressure and brittle deformation that has in turn enhanced secondary porosity resulting in joints and fractures which are good for groundwater movement. Scanning electron microscopy complemented the findings from optical microscopy by revealing splatter pores which are due to intense fracturing and these contribute to increasing permeability of the rock structures. XRF revealed the chemical composition of various rock types in the area of study. The analysed samples were dominated by silica reflecting their source from weathering of silicate rocks. The Chemical Index of Alteration (CIA) and Al2O3 values of the analysed samples reflected moderate to intensive weathering. In the study area, three main hydrogeologically important structures were taken into account. These included primary structures (bedding), contacts (geological) and secondary structures like fractures and folds. The study area comprises of several faults that are an important factor for porosity and permeability. The study area is dominated by blocky quartz veins that have been crushed due to compression hence higher permeability of groundwater. The Syscal Pro multichannel resistivity equipment was used to conduct the survey using the Schlumberger- Dipole-dipole array on three lines of varying length (350 m, 530 m and 340 m). Data collected were processed using RES2DINV software, producing a subsurface 2-D geoelectrical model from the pseudosections of apparent resistivity. Low resistivities in the study area were inferred to be weathered moist sandstone while low resistivities with depth indicated an overlying zone of fractured sandstone and quartzite which may be hosting some groundwater. An area of low resistivity zones between two large bodies suggests that the massive rock bodies are being weathered and fractured and fractures act as conduits for groundwater. High resistivity values indicate hard rock bodies that are unweathered hence low potential zone for groundwater localisation. The ground magnetic survey was used to delineate the subsurface structures as these control groundwater potential.
- Full Text:
Uhlalutyo lwenoveli kamahala ethi: yakhal’ indoda (2010).
- Authors: Nyiki, Phumelela Sibahle
- Date: 2020
- Subjects: Literature
- Language: English
- Type: Thesis , Masters , MA (African Languages)
- Identifier: http://hdl.handle.net/10353/18257 , vital:42246
- Description: The aim and scope of this study is to analyse the novel Yakhal’ Indoda (2010) written by Siphiwo Mahala. Since this book was written in the period known as the modern times in the new South Africa, it therefore tends to focus on the issues that disturb the peace of the citizens of South Africa exactly in this period of democratic South Africa. For that reason, the objective of this study is to associate the factors which Mahala has written about with those that are found in the contemporary South Africa which are regarded as issues disturbing the lives of South Africans at present. As it is of importance before the researcher deals with the central issue, there has to be a thorough knowledge of the theory of the subject that is being discussed at hand. The Literature Review with regard to this study takes into account the books written by Satyo, Duka, Brooks and Warren, to mention just a few. These authors, from their different academic perspectives, do their best on explaining the theory of the issues that will be discussed in this study. The Theoretical Framework that will be used in this study consists of the views of the writers who fought for a better political dispensation in the countries that were previously colonized. In this regard, the views of Ngùgì wa Thiong’o, and those of Steve Biko will be assessed in this study. The method that will be used in conducting this research is none other than that of Text Analysis. This simply means the researching student will focus mainly on the books found at the UFH library and other libraries. The chapter titles and their relevant outlines follow below: Chapter One is an introduction for this entire research. This chapter focuses more on the aims of this study, the importance or significance, limitations, methodology to be followed. Furthermore, this chapter gives a brief background of the author of the novel that will be analysed as well as the background of the novel. Chapter Two focuses on the theory of this research. This will be done through two theories. The researcher will first present a theory of the novel, as well as the Postcolonial theory. Under the novel theory, the researcher will discuss some vii features of the novel. However, the researcher’s emphasis will be on the theme that underlies in Mahala’s novel, Yakhal’ Indoda (2010). Chapter Three focuses on the theme of this research. The researcher will analyse the way Mahala portrays crime, corruption, unemployment and poverty in his novel. The researcher then will validate Mahala’s point of view against other authors with regards to the identified problems. Chapter Four focuses on the problems found in the Department of Education as well as rights of women as depicted in Mahala’s novel, Yakhal’ Indoda (2010). This will be accomplished through validation of the experienced and witnessed events in the new South Africa. Chapter Five focuses on the factors and events that are commonly associated with the Departments of Health and in Local Government, which are life threatening to society. This will be done by the researcher, pointing out some problems that Mahala in his book Yakhal’ Indoda (2010) attributes to the mentioned departments. Chapter Six is the general conclusion and exegesis on the study. This chapter gives a brief summary of the previous chapters, the findings regarding this study.
- Full Text:
- Authors: Nyiki, Phumelela Sibahle
- Date: 2020
- Subjects: Literature
- Language: English
- Type: Thesis , Masters , MA (African Languages)
- Identifier: http://hdl.handle.net/10353/18257 , vital:42246
- Description: The aim and scope of this study is to analyse the novel Yakhal’ Indoda (2010) written by Siphiwo Mahala. Since this book was written in the period known as the modern times in the new South Africa, it therefore tends to focus on the issues that disturb the peace of the citizens of South Africa exactly in this period of democratic South Africa. For that reason, the objective of this study is to associate the factors which Mahala has written about with those that are found in the contemporary South Africa which are regarded as issues disturbing the lives of South Africans at present. As it is of importance before the researcher deals with the central issue, there has to be a thorough knowledge of the theory of the subject that is being discussed at hand. The Literature Review with regard to this study takes into account the books written by Satyo, Duka, Brooks and Warren, to mention just a few. These authors, from their different academic perspectives, do their best on explaining the theory of the issues that will be discussed in this study. The Theoretical Framework that will be used in this study consists of the views of the writers who fought for a better political dispensation in the countries that were previously colonized. In this regard, the views of Ngùgì wa Thiong’o, and those of Steve Biko will be assessed in this study. The method that will be used in conducting this research is none other than that of Text Analysis. This simply means the researching student will focus mainly on the books found at the UFH library and other libraries. The chapter titles and their relevant outlines follow below: Chapter One is an introduction for this entire research. This chapter focuses more on the aims of this study, the importance or significance, limitations, methodology to be followed. Furthermore, this chapter gives a brief background of the author of the novel that will be analysed as well as the background of the novel. Chapter Two focuses on the theory of this research. This will be done through two theories. The researcher will first present a theory of the novel, as well as the Postcolonial theory. Under the novel theory, the researcher will discuss some vii features of the novel. However, the researcher’s emphasis will be on the theme that underlies in Mahala’s novel, Yakhal’ Indoda (2010). Chapter Three focuses on the theme of this research. The researcher will analyse the way Mahala portrays crime, corruption, unemployment and poverty in his novel. The researcher then will validate Mahala’s point of view against other authors with regards to the identified problems. Chapter Four focuses on the problems found in the Department of Education as well as rights of women as depicted in Mahala’s novel, Yakhal’ Indoda (2010). This will be accomplished through validation of the experienced and witnessed events in the new South Africa. Chapter Five focuses on the factors and events that are commonly associated with the Departments of Health and in Local Government, which are life threatening to society. This will be done by the researcher, pointing out some problems that Mahala in his book Yakhal’ Indoda (2010) attributes to the mentioned departments. Chapter Six is the general conclusion and exegesis on the study. This chapter gives a brief summary of the previous chapters, the findings regarding this study.
- Full Text:
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