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Littérature scientifique sur le sujet « River sediments – South Africa – Durban »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 6 février 2022

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Articles de revues sur le sujet "River sediments – South Africa – Durban"

Singh, Gulshan, Ayanda Sithebe, Abimbola M. Enitan, Sheena Kumari, Faizal Bux, and Thor Axel Stenström. "Comparison of droplet digital PCR and quantitative PCR for the detection of Salmonella and its application for river sediments." Journal of Water and Health 15, no. 4 (2017): 505–8. http://dx.doi.org/10.2166/wh.2017.259.

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Despite advances in microbial detection that quantitative polymerase chain reaction (qPCR) has led to, complex environmental samples, such as sediments, remain a challenge due to presence of PCR inhibitors. Aquatic sediments accumulate particle-bound microbial contaminants and thereby reflect a cumulative microbial load over time. The relatively new droplet digital PCR (ddPCR) has emerged as a direct quantitative method, highly tolerant to PCR inhibitors and relinquishing the necessity for calibration/standard curves. Information is virtually absent where ddPCR has been applied to detect patho

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Micallef, Aaron, Aggeliki Georgiopoulou, Andrew Green, and Vittorio Maselli. "Impact of sea-level fluctuations on the sedimentation patterns of the SE African margin: implications for slope instability." Geological Society, London, Special Publications 500, no. 1 (2019): 267–76. http://dx.doi.org/10.1144/sp500-2019-172.

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AbstractThe sheared-passive margin offshore Durban (South Africa) is characterized by a narrow continental shelf and steep slope hosting numerous submarine canyons. Supply of sediment to the margin is predominantly terrigenous, dominated by discharge from several short but fast-flowing rivers. International Ocean Discovery Program Expedition 361 provides a unique opportunity to investigate the role of sea-level fluctuations on the sedimentation patterns and slope instability along the South African margin. We analysed >300 sediment samples and downcore variations in P-wave, magnetic suscept

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Lin, Johnson, and Atheesha Singh. "Detection of human enteric viruses in Umgeni River, Durban, South Africa." Journal of Water and Health 13, no. 4 (2015): 1098–112. http://dx.doi.org/10.2166/wh.2015.238.

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The prevalence of adenovirus (AdV), rotaviruses (RV) and enteroviruses (EV) in Umgeni River waters of Durban, South Africa was assessed qualitatively and quantitatively during April 2011 to January 2012 using polymerase chain reaction (PCR)/reverse transcription-polymerase chain reaction (RT-PCR), nested PCR and quantitative PCR (qPCR), as well as nested integrated cell culture PCR (nested ICC-PCR). The phylogenetic analysis of the adenovirus and enterovirus amplicons was also performed. The nested PCR results effectively detected the presence of AdV and EV in all water samples. The results of

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Hyde, K. D., T. K. Goh, and T. D. Steinke. "Fungi on submerged wood in the Palmiet River, Durban, South Africa." South African Journal of Botany 64, no. 3 (1998): 151–62. http://dx.doi.org/10.1016/s0254-6299(15)30860-7.

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Marie, Veronna, and Johnson Lin. "Microbial indicators and environmental relationships in the Umhlangane River, Durban, South Africa." Open Life Sciences 13, no. 1 (2018): 385–95. http://dx.doi.org/10.1515/biol-2018-0047.

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AbstractThe use of rivers for recreational and domestic practices makes it imperative to scrutinize the water quality circulating within surrounding communities. The complexity of biological, physical and chemical constituents in water is constantly evolving. This study evaluated various microbial and physico-chemical parameters in a polluted river system over a 12-month period. Apart from an increase in chemical pollutants, elevated levels of E. coli, total (TC) and faecal (FC) coliforms, and Shigella species could be attributed to faecal contamination entering the catchment. Canonical corres

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Vogt, T., R. Pieters, and BK Newman. "PAHs, OCPs and PCBs in sediments from three catchments in Durban, South Africa." African Journal of Aquatic Science 43, no. 1 (2018): 35–49. http://dx.doi.org/10.2989/16085914.2018.1445616.

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Olaniran, Ademola O., Kovashnee Naicker, and Balakrishna Pillay. "Antibiotic resistance profiles of Escherichia coli isolates from river sources in Durban, South Africa." World Journal of Microbiology and Biotechnology 25, no. 10 (2009): 1743–49. http://dx.doi.org/10.1007/s11274-009-0071-x.

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Padayachee, Ashlyn L., Şerban Procheş, and John R. U. Wilson. "Prioritising potential incursions for contingency planning: pathways, species, and sites in Durban (eThekwini), South Africa as an example." NeoBiota 47 (June 19, 2019): 1–21. http://dx.doi.org/10.3897/neobiota.47.31959.

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Increased trade and travel have resulted in an increasing rate of introduction of biological organisms to new regions. Urban environments, such as cities, are hubs for human activities facilitating the introduction of alien species. Additionally, cities are susceptible to invading organisms as a result of the highly altered and transformed nature of these environments. Despite best efforts at prevention, new incursions of alien species will occur; therefore, prioritising incursion response efforts is essential. This study explores these ideas to identify priorities for strategic prevention pla

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Pheiffer, W., R. Pieters, JC van Dyk, and NJ Smit. "Metal contamination of sediments and fish from the Vaal River, South Africa." African Journal of Aquatic Science 39, no. 1 (2014): 117–21. http://dx.doi.org/10.2989/16085914.2013.854732.

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Olukunle, Olubiyi, Jonathan Okonkwo, Kebede Kefeni, and Mlindelwa Lupankwa. "Concentrations of Polybrominated Diphenyl Ethers in Sediments from Jukskei River, Gauteng, South Africa." Bulletin of Environmental Contamination and Toxicology 88, no. 3 (2011): 461–66. http://dx.doi.org/10.1007/s00128-011-0481-y.

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Thèses sur le sujet "River sediments – South Africa – Durban"

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. 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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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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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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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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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. 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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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. 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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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 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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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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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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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. 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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Livres sur le sujet "River sediments – South Africa – Durban"

International Conference on Fluvial Sedimentology (6th 1997 Cape Town, South Africa). Fluvial aspects of the Ordovician table mountain group: Slack-water deposits of the 1981 Buffels River flood, Laingsburg : alluvial fan enon formation (cretaceous), Oudtshoorn : post-conference field excursion, 6th International Conference on Fluvial Sedimentology, University of Cape Town, South Africa, 27 September to 1 October 1997. The Conference, 1997.

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Holmes, Jonathan, and Philipp Hoelzmann. The Late Pleistocene-Holocene African Humid Period as Evident in Lakes. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190228620.013.531.

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From the end of the last glacial stage until the mid-Holocene, large areas of arid and semi-arid North Africa were much wetter than present, during the interval that is known as the African Humid Period (AHP). During this time, large areas were characterized by a marked increase in precipitation, an expansion of lakes, river systems, and wetlands, and the spread of grassland, shrub land, and woodland vegetation into areas that are currently much drier. Simulations with climate models indicate that the AHP was the result of orbitally forced increase in northern hemisphere summer insolation, whi

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Chapitres de livres sur le sujet "River sediments – South Africa – Durban"

Martel, Patrick, and Catherine Sutherland. "Governing River Rehabilitation for Climate Adaptation and Water Security in Durban, South Africa." In The Geography of Climate Change Adaptation in Urban Africa. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04873-0_13.

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Actes de conférences sur le sujet "River sediments – South Africa – Durban"

Anderson, John Robert Beveridge. "Design and Development of the Msikaba and Mtentu River Bridges." In IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World. International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0497.

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The story of the Msikaba and Mtentu River Bridges is a story about the Transkei Region in South Africa. The area’s unfenced rural landscape is considered unique and is characterised by steep gorges and rivers that run down to the Wild Coast. The civil engineers of the past avoided the area and the main highway connecting the ports of Durban and East London runs 200 km inland. This is now changing with the South African National Roads Agency’s SOC Ltd (SANRAL’s) procurement of the new N2 Wild Coast Road that will realign the highway within 30 km of the coast. The project includes two n

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