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Dissertations / Theses on the topic 'River sediments – South Africa – Durban'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Haniff, Naadira. "Trace metal accumulation in urban sediments, Black River, Western Cape, South Africa." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/4201.

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Bibliography: leaves 74-77.<br>The increase in urbanisation and the use of metal compounds and products domestically and in industry has resulted in the production of by-products and wastes, which needs to be evaluated in the urban environment. The discharge of some of these wastes into urban rivers should be evaluated to determine the potential effects, for example, toxicity and mobility. The effects may, in part, be determined by the chemical states in which these wastes manifest themselves, and by the chemical associations they have.

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2

Bordy, Emese M. "Sedimentology of the Karoo Supergroup in the Tuli Basin (Limpompo River area, South Africa)." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1005612.

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The sedimentary rocks of the Karoo Supergroup in the Tuli Basin (South Africa) consist of various terrigenous clastic and chemical deposits (parabreccias, conglo-breccias, conglomerates, sandstones, fine-grained sediments, calcretes and silc~etes). Four stratigraphic units were identified: the Basal, Middle and· Upper Units, and the CI~rens Formation. The palaeo-environmental reconstructions of the four stratigraphic units are based on evidence provided by primary sedimentary structures, palaeo-flow measurements, clast size/shape analysis, petrographic studies, palaeontological findings, boreh

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3

Huchzermeyer, Nicholaus Heinrich. "A baseline survey of channel geomorphology with particular reference to the effects of sediment characteristics on ecosystem health in the Tsitsa River, Eastern Cape, South Africa." Thesis, Rhodes University, 2018. http://hdl.handle.net/10962/58056.

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Fluvial systems are dynamic systems in which variables in a catchment and river channel affect the morphology of river reaches. South African rivers are increasingly being exposed to stresses from a combination of factors, one of the most prevalent being the impacts of damming rivers which result in varying downstream sediment fluxes and flow regimes. The sediment load combined with flow characteristics for respective river channels provides the physical habitat for aquatic ecosystems. The damming of the Tsitsa River, through the construction of the Ntabelanga Dam, will change the overall down

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4

Tembisa, Papiyana Ayavuya. "Isolation and characterisation of lignocellulose degrading bacteria from Tyume River in the Eastern Cape Province, South Africa." Thesis, University of Fort Hare, 2015. http://hdl.handle.net/10353/d1021293.

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This study focuses on the isolation and characterization of bacteria from lignocellulosic biomass obtained from the sediments of the Tyume River in Alice, Eastern Cape and to determine those bacterial isolates with good potential for modification and decomposition of lignocellulosic biomass for industrial application. Several bacterial isolates were recovered and screened for ability to degrade various lignocellulosic materials. Nine of the isolates were positive for lignocellulolytic activity. Four isolates were cellulase positive and six were xylanase positive. Moreover, one isolate (SB1) wa

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5

Benamer, Mustafa Alarabi. "Chemical speciation and spatial distribution of heavy metals and their adsorption onto sediments of the Berg River, Western Cape, South Africa." Doctoral thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/13167.

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Includes bibliographical references.<br>The Berg River, Western Cape, South Africa, is an example of a catchment region where human pressures and conservation of natural resources collide. The river receives effluents from two large settlements and several smaller adjacent villages, including that of industrial and extensive agricultural activity. The estuary is one of the largest in South Africa and rated as the third most important conservation zone in the country. In this study, the chemical speciation of heavy metals in the river sediment was determined in order to evaluate the extent of p

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6

Van, der Walt Sarel C. "Mathematical modelling of sediment transport dynamics in the Berg River considering current and future water resources development scenarios." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50395.

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Thesis (MscEng)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: The environmental impacts of manmade changes to rivers are, in modern days, extremely important. The impact needs to be quantified in order to predict future happenings and to assist in determining preventative measures. Dam construction forms an essential part of modern life to provide the necessary water demand for the ever increasing population. One manmade change that has a major impact on rivers is large dam developments in the upper reaches of rivers. These developments normally have the following effects on th

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7

Gohell, Ashla Fiona. "The impact of water and sediment quality on the health of Oreochromis Mossambicus (Peters, 1852) and Schilbe Intermedius Ruppell, 1832 at the Phalaborwa Barrage in the Olifants River." Thesis, University of Limpopo, 2014. http://hdl.handle.net/10386/1225.

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Thesis (MSc. (Zoology)) -- University of Limpopo, 2014<br>The Olifants River is presently one of the most threatened river systems in South Africa. The Upper and Middle catchments are heavily impacted by anthropogenic activities, however little is known of the status of the river in the Lower catchment in the Limpopo Province. Thus the aim of this study was to evaluate the impact of water quality on the health of Oreochromis mossambicus and Schilbe intermedius at the Phalaborwa Barrage. This was achieved through assessing the water (seasonally) and sediment quality (bi-annually) at three sites

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8

Spaggiari, Renato Igino. "Sedimentology of plio-pleistocene gravel barrier deposits in the palaeo-Orange River mouth, Namibia : depositional history and diamond mineralisation." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1004636.

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The largest known marine diamond placer, the Namibian mega-placer, lies along the Atlantic coast of south-western Africa from the Orange River mouth 1,000 km northwards to the Namibian-Angolan border. The most economically viable portion of the Namibian mega-placer (>75 million carats recovered at >95% gem quality) comprises onshore and offshore marine deposits that are developed within ∼100km of the Orange River outfall. For much of the Cainozoic, this long-lived fluvial system has been the main conduit transporting diamonds from kimberlitic and secondary sources in the cratonic hinterland of

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9

Ma, Ying. "Monitoring of heavy metals in the Bottelary River using Typha capensis and Phragmites australis." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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The aim of this study was to use plants to determine the degree of heavy metal contamination in water and sediments in order to effectively monitor and provide possible recommendation to improve the water quality in the aquatic ecosystem of the Bottelary River.

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10

Van, Der Westhuizen Asriel. "Provenance of alluvial diamonds in Southern Africa : a morphological and mineral chemistry study of diamonds and related heavy minerals from the Vaalorange system and the West Coast." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20155.

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Thesis (PhD)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The discovery of lucrative diamond deposits along the west coast of Southern Africa about 1200 kilometres from the Kimberley region during the period 1908 to 1927, gave rise to a number of different theories with respect to their possible provenance. These included the transportation of diamonds from unknown sources in southern Namibia by south-flowing rivers, hidden on- and off-shore kimberlites along the coast, and transportation by west-bound rivers from the hinterland. Subsequent research has shown that the latter is t

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11

Jaiyeola, Adesoji Tunbosun. "Estimation of suspended sediment yield flowing into Inanda Dam using genetic programming." Thesis, 2016. http://hdl.handle.net/10321/1495.

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Submitted in fulfilment of the requirements of the degree of Master of Engineering , Durban University of Technology, Durban, South Africa, 2016.<br>Reservoirs are designed to specific volume called the dead storage to be able to withstand the quantity of particles in the rivers flowing into it during its design period called its economic life. Therefore, accurate calculation of the quantities of sediment being transported is of great significance in environment engineering, hydroelectric equipment longevity, river aesthetics, pollution and channel navigability. In this study different input c

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12

Singh, Atheesha. "Surveillance of microbial pathogens in the Umgeni River, Durban South Africa." Thesis, 2013. http://hdl.handle.net/10413/10070.

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This study assessed the quality of the Umgeni River in Durban South Africa seasonally from March 2011 to January 2012, according to standard protocol. Water samples were collected from Inanda dam-U5, KrantzKloof Nature Reserve-U4, New Germany-U3, Reservoir Hills –U2 and River mouth – U1 areas of the Umgeni River. A two-step tangential flow filtration (TFF) process was setup for the concentration of viruses from water samples. Virus like particles (VLPs) was detected using electron microscopy. Canonical correspondence analysis (CCA) was used to statistically evaluate the data sets. All water sa

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13

Colarossi, Debra. "Geology and geochronology of the Nyl River floodplain sediments, Limpopo province, South Africa." Thesis, 2013. http://hdl.handle.net/10539/12951.

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A Dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the Degree of Master of Science in Geology. Johannesburg 2013<br>The Nyl River floodplain, located in the Limpopo Province, is one of the few active sedimentary basins that exist within the South African interior, providing a unique opportunity to study the effect of climate change on fluvial systems. Progradation of tributary fans into the Nyl/Mogalakwena River has raised the surface by 30 m and forced the course of the river westwards towards the Wat

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14

Simpson, Elizabeth Anne. "The role of sulphate-reducing bacteria in mercury-contaminated estuarine sediments : a case study of Durban Bay." Thesis, 2003. http://hdl.handle.net/10321/2017.

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Dissertation submitted in compliance with the requirements for the Master's Degree in Technology: Biotechnology, Durban Insititute of Technology, 2003.<br>Stimulated by the findings of international researchers, that the sulfate-reducing microorganism Desulfovibrio desulfuricans could be incriminated in the process of mercury bio-methylation, it was decided to test this hypothesis on sediments from selected areas of Durban Bay where elevated levels of the bio-hazardous heavy metal had previously been detected. The Environmentek Division of the Council for Scientific and Industrial Researc

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15

Burri, Nicole M. "Depositional slope surface of the western margin of the Nylsvlei, South Africa : active piedmont aggradation and sedimentation processes." Thesis, 2014.

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The Nyl River and its floodplain are situated on the eastern foothills of the Waterberg mountain range in the Limpopo Province of South Africa. Tributaries flowing out of the Waterberg range display unusual downstream changes, as they approach and converge with the Nylsvlei (or Nyl floodplain). Tributary channels decrease in size downstream until, eventually, they disappear altogether forming unchannellized floodouts. On one such floodout, on the farm Driefontein, an actively aggrading piedmont has formed adjacent to the famous Wonderkrater peat mound, known for its pollen record dating back ~

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16

Pentz, Tarryn Susan. "Chemical characterisation of sediments and its correlation with the bioavailability of selected heavy metals." Thesis, 2012. http://hdl.handle.net/10210/6327.

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M.Sc.<br>The study looks into the sediment-bound metals (Fe, Mn, Cu, Cr, Cd, Co, Pb, Ni, Zn and Hg) of the Leeu/Taaibospruit catchment, which is impacted by agricultural, industrial and urban development. A number of chemical procedures, including total metal determination, the Tessier-sequential extraction scheme, the BCR Protocol, evaluation of the % TOC and determination of AVS to SEM ratios were applied to sediment samples collected from eight sites along the two rivers in the study area. Samples were collected during both high flow (summer) and low flow (winter) conditions. Following the

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17

Khumalo, Phumelele. "Assessing women's participation in planning and construction of their houses : a case study of the Piesang River People's Housing Project, Durban." Thesis, 2013. http://hdl.handle.net/10413/11347.

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African women in the past were not given equal opportunities with men in planning and construction of their houses. As a result there is no clear indicative level of participation of women during the planning and construction of their houses. The People’s Housing Process is one of the approaches adopted by government and community organizations to encourage community participation in their housing projects but; women’s involvement is still not clear. Therefore this research is aiming to understand the activities performed by women, their roles in related activities, and the methods that they u

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18

Mokgohloa, Conny Putsane. "Speciation of chromium in water and sediments from Mokolo and Blood rivers, Limpopo Province." Thesis, 2019. http://hdl.handle.net/10386/3145.

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Thesis (M.Sc.(Chemistry)) -- University of Limpopo, 2019<br>Rivers provide the main water sources for domestic, industrial, and irrigational purposes; however, they could be polluted by receiving wastes from municipal and industrial sources as well as runoff from agricultural land. This could leave rivers contaminated with chromium (Cr) and other potentially toxic elements. Chromium can be either essential or carcinogenic depending on the chemical form. The aim of this study was to assess and quantify trivalent Cr [Cr(III)] and hexavalent Cr [Cr(VI)] in water and sediment samples, collected

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19

Foster, Lee-Ann Sade. "The effect of water and sediment quality on macro-invertebrate communities from selected endorheic pans." Thesis, 2014. http://hdl.handle.net/10210/11326.

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M.Sc. (Environmental Management)<br>Wetlands play a significant role in our environment as they provide a variety of goods, services and benefits to living species ranging from humans, animals and plants to microorganisms. Despite their importance, wetlands have somewhat been neglected over the past few years which has led to a rapid deterioration of wetland conditions and functions. Wetlands provide unique functions that cannot be provided by any other ecosystem; their value was recognised in the 1960s. Prior to this realisation the value of wetlands had been seriously underestimated to the e

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20

Zuma, Vincent Thulani. "Determination and characterisation of trace metals and persistant oganic pollutants in Baynespruit river, Sobantu, KwaZulu-Natal, South Africa." Diss., 2017. http://hdl.handle.net/10500/23624.

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This study assesses the presence of selected trace metals and pops in the Baynespruit River, Sobantu, KwaZulu-Natal. Sediments, plants and water samples were collected along the river during dry and wet season. For metal analysis, the extraction was done using acid digestion and then determined on the inductively coupled plasma atomic emission spectroscopy, for total metals in sediments, plants and water. Bio-available metals in sediments were analysed using atomic absorption spectroscopy. POPs were extracted in sediments using soxhlet extraction, which was followed up by evaporation on the ro

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21

Matabane, Dithobolong Lovia. "Identification determination of potentially toxic elements in water and sediments from blood and Mokolo rivers in Limpopo Province, South Africa." Thesis, 2019. http://hdl.handle.net/10386/3083.

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Thesis (M. Sc. (Chemistry)) -- University of Limpopo, 2019<br>The increase in industrialisation such as mining and smelting activities is among the main sources of heavy metal pollution in the environment. These potentially toxic elements may be adsorbed directly by sediments of water course and may affect the inhabiting flora and fauna. Potentially toxic elements are not permanently fixed by the sediments since changes in environmental conditions can mobilise these elements from sediments to water. Thus, analysis of sediments could indicate the degree of environmental contamination by potent

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22

Luzulane, Nosisi Cynthia. "A comparative analysis of the developer driven process versus people's housing process : a case study of Wiggins Fast Track and Piesangs River in Durban, South Africa." Thesis, 2002. http://hdl.handle.net/10413/9439.

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23

Bowden, Laura Leigh. "A comparative study of detrital zircon ages from river sediment and rocks of the Karoo Supergroup (Late Carboniferous to Jurassic), Eastern Cape Province, South Africa : implications for the tectono-sedimentary evolution of Gondwanaland’s southern continental margin." Thesis, 2014. http://hdl.handle.net/10210/11320.

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M.Sc. (Geology)<br>The Mzimvubu River, situated in the Eastern Cape Province of South Africa, drains essentially strata of the Late Carboniferous to Jurassic Karoo Supergroup with minor intersection of the underlying Devonian Msikaba Formation near the mouth of the river at Port St. Johns. Rock- and river sediment samples were collected at specific points from within the Mzimvubu River drainage basin, based on changes in the geology through which the rivers flow. Detrital zircon age population data was obtained by LA-ICP-MS for each sample in order to meet the two-fold objective of the study;

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24

Sukdeo, Prisha. "A study of the natural and anthropogenic impacts on the sediment and water quality of the middle and lower Mvoti River System, KwaZulu-Natal, South Africa." Thesis, 2010. http://hdl.handle.net/10413/5361.

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This dissertation focussed on the Mvoti River system in KwaZulu-Natal, an important resource for the numerous towns and villages along its course. Catchment activities are varied with agriculture being the predominant activity, and industrial activities common in the lower catchment. The Mvoti River is intensively utilized, especially in its lower reaches, to the extent that it is referred to as a ‘working river’. Modifications of the chemical and physical characteristics of the system, and consequently the biological characteristics, have led to degradation of the system such that the functio

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25

Ngetar, Njoya Silas. "Post-dam sediment dynamics below the Inanda Dam at the Mgeni estuary, KwaZulu Natal (South Africa)." Thesis, 2002. http://hdl.handle.net/10413/5047.

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The Inanda Dam, situated some 32 to 35km upstream of the Mgeni River estuary on the Indian Ocean 5 km north of Durban, was constructed between 1984 and 1989. This impoundment deprived the downstream section of a great volume of water and sediment supply, initiating significant downstream changes. This situation is compounded by sand winning which directly extracts about 210,000 tonnes of sediment from the Lower Mgeni further depriving the estuary of sediment. A 1997 study predicted that assuming a continuous competent discharge and low contribution of sediments from the tributaries, the channe

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