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Journal articles on the topic 'Aquifers – South Africa – Loxton'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Botha, J. F., and A. H. J. Cloot. "Deformations and the Karoo aquifers of South Africa." Advances in Water Resources 27, no. 4 (2004): 383–98. http://dx.doi.org/10.1016/j.advwatres.2004.02.014.

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2

Cobbing, J. E., P. J. Hobbs, R. Meyer, and J. Davies. "A critical overview of transboundary aquifers shared by South Africa." Hydrogeology Journal 16, no. 6 (2008): 1207–14. http://dx.doi.org/10.1007/s10040-008-0285-2.

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3

Mohuba, Seeke C., Tamiru A. Abiye, Molla B. Demlie, and Moneri J. Modiba. "Hydrogeological Characterization of the Thyspunt Area, Eastern Cape Province, South Africa." Hydrology 7, no. 3 (2020): 49. http://dx.doi.org/10.3390/hydrology7030049.

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This paper presents a comprehensive hydrogeological investigation that involves field work, aquifer test, hydrogeochemical analysis, environmental isotope analysis, and interpretations around a proposed nuclear power facility in South Africa. The study was undertaken to test the complementarity of the various methods in the coastal aquifer and to verify the hydrogeological conditions within and around the site. The study revealed the presence of two types of aquifers: an upper primary aquifer made up of the Cenozoic deposits of the Algoa Group, and a deeper fractured aquifer made of the Palaez

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4

Van Tonder, G. J., and J. Kirchner. "Estimation of natural groundwater recharge in the Karoo aquifers of South Africa." Journal of Hydrology 121, no. 1-4 (1990): 395–419. http://dx.doi.org/10.1016/0022-1694(90)90243-q.

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5

Adams, S., R. Titus, K. Pietersen, G. Tredoux, and C. Harris. "Hydrochemical characteristics of aquifers near Sutherland in the Western Karoo, South Africa." Journal of Hydrology 241, no. 1-2 (2001): 91–103. http://dx.doi.org/10.1016/s0022-1694(00)00370-x.

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6

Jonker, B., and T. Abiye. "Groundwater potential of the eastern Kalahari region of South Africa." South African Journal of Geology 120, no. 3 (2017): 385–402. http://dx.doi.org/10.25131/gssajg.120.3.385.

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Abstract An integrated approach involving geological, borehole data, hydrogeochemical and environmental isotope analyses was used to determine the groundwater potential of the eastern Kalahari region of South Africa, an area to the west of Mahikeng that stretches northward from the Orange River into Botswana. The total groundwater resource potential for the eastern Kalahari region of South Africa is estimated at 10127 Mm3/a, with the Kalahari Group aquifer showing the greatest potential, comprising 51% of the total resource. The storage capacity of the Kalahari Group aquifer (7130 Mm3) is also

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7

Ndlovu, M. S., M. Demlie, and M. Butler. "Hydrogeological setting and hydrogeochemical characteristics of the Durban Metropolitan District, eastern South Africa." South African Journal of Geology 122, no. 3 (2019): 299–316. http://dx.doi.org/10.25131/sajg.122.0026.

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Abstract Population and economic growth within the Durban Metropolitan region in eastern South Africa have increased the demand for water supply. Though the region’s water supply comes mainly from surface water sources, the ever-increasing demand means that all available water supply sources including groundwater will be looked at, particularly in the peri-urban areas. However, the state of the groundwater resource in the region is poorly understood. This study aims to contribute towards improved understanding of the state of groundwater resources in the Metropolitan District through an integr

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8

Dippenaar, Matthys A., Kai T. Witthüser, and J. Louis Van Rooy. "Groundwater occurrence in Basement aquifers in Limpopo Province, South Africa: model-setting-scenario approach." Environmental Earth Sciences 59, no. 2 (2009): 459–64. http://dx.doi.org/10.1007/s12665-009-0044-2.

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9

Fallon, A. L., K. G. Villholth, D. Conway, B. A. Lankford, and G. Y. Ebrahim. "Agricultural groundwater management strategies and seasonal climate forecasting: perceptions from Mogwadi (Dendron), Limpopo, South Africa." Journal of Water and Climate Change 10, no. 1 (2018): 142–57. http://dx.doi.org/10.2166/wcc.2018.042.

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Abstract This paper explores the agricultural groundwater management system of Mogwadi (Dendron), Limpopo, South Africa – an area associated with intensive use of hard rock aquifers for irrigation – and the potential contribution of seasonal forecasts. These relatively shallow aquifers are often perceived as ‘self-regulating’, yet climate variability and infrequent recharge episodes raise the question of whether seasonal forecasting could contribute to more sustainable groundwater use. Hydro-meteorological observations, interviews and repeat focus groups with commercial farmers were used to ex

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10

Sun, Xiaobin, Yongxin Xu, and Lixiang Lin. "The diagnostic plot analysis of artesian aquifers with case studies in Table Mountain Group of South Africa." Hydrogeology Journal 23, no. 3 (2014): 567–79. http://dx.doi.org/10.1007/s10040-014-1203-4.

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11

Leketa, Khahliso, Tamiru Abiye, Silindile Zondi, and Michael Butler. "Assessing groundwater recharge in crystalline and karstic aquifers of the Upper Crocodile River Basin, Johannesburg, South Africa." Groundwater for Sustainable Development 8 (April 2019): 31–40. http://dx.doi.org/10.1016/j.gsd.2018.08.002.

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12

Holland, Martin, and Kai T. Witthüser. "Evaluation of geologic and geomorphologic influences on borehole productivity in crystalline bedrock aquifers of Limpopo Province, South Africa." Hydrogeology Journal 19, no. 5 (2011): 1065–83. http://dx.doi.org/10.1007/s10040-011-0730-5.

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13

Abiye, Tamiru A., Molla B. Demlie та Haile Mengistu. "An Overview of Aquifer Physiognomies and the δ18O and δ2H Distribution in the South African Groundwaters". Hydrology 8, № 2 (2021): 68. http://dx.doi.org/10.3390/hydrology8020068.

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A comprehensive assessment of the stable isotope distribution in the groundwater systems of South Africa was conducted in relation to the diversity in the aquifer lithology and corresponding hydraulic characteristics. The stable isotopes of oxygen (18O) and hydrogen (2H) in groundwater show distinct spatial variation owing to the recharge source and possibly mixing effect in the aquifers with the existing water, where aquifers are characterized by diverse hydraulic conductivity and transmissivity values. When the shallow aquifer that receives direct recharge from rainfall shows a similar isoto

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14

Mahed, G. "Development of a sampling protocol for radioactive elements in fractured rock aquifers using a case study from South Africa." TOS Forum 2013, no. 1 (2015): 19. http://dx.doi.org/10.1255/tosf.41.

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15

Mndaweni, S. S. E., S. Naicker, and D. Blake. "Hydrostratigraphy of the Malmani Subgroup dolomites within the northeastern escarpment (Limpopo and Mpumalanga, South Africa)." South African Journal of Geology 122, no. 3 (2019): 283–98. http://dx.doi.org/10.25131/sajg.122.0022.

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Abstract The Late Archaean to Early Proterozoic Malmani Subgroup comprises of dolomites and limestones forming part of the Chuniespoort Group within the Transvaal Supergroup, outcropping as an arc structure east of the Pretoria Group along the Limpopo and Mpumalanga escarpment. These rocks form a fractured karst aquifer in the area and have a high degree of heterogeneity and anisotropy. The aquifers are unconfined to semi-confined, with compartmentalisation by dolerite dykes being a possible effect (if the dykes are large and extensive enough) due to the dykes acting as aquitards or barriers t

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16

Carstens, Alewyn, Catheleen Bartie, Rainier Dennis, and Carlos Bezuidenhout. "Antibiotic-resistant heterotrophic plate count bacteria and amoeba-resistant bacteria in aquifers of the Mooi River, North West province, South Africa." Journal of Water and Health 12, no. 4 (2014): 835–45. http://dx.doi.org/10.2166/wh.2014.226.

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Groundwater in the Mooi River catchment is prone to mining, agricultural, municipal and septic tank pollution. In this study physico-chemical and microbiological parameters were determined using appropriate methods. Bacterial isolates were identified by 16S rRNA sequencing (heterotrophic plate count (HPC) bacteria and amoeba-resistant bacteria (ARB)) and multiplex polymerase chain reaction (Escherichia coli). Antibiotic resistance tests were also performed. Physico-chemical parameters were generally within target water quality ranges for drinking water. HPC bacteria ranged between 105 and 107

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17

Sun, X., and Y. Xu. "A hydraulic test device for free-flowing artesian boreholes with a case study in Table Mountain Group (TMG) aquifers, South Africa." Water SA 40, no. 3 (2014): 445. http://dx.doi.org/10.4314/wsa.v40i3.7.

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18

Baker, Brett J., Duane P. Moser, Barbara J. MacGregor, et al. "Related assemblages of sulphate-reducing bacteria associated with ultradeep gold mines of South Africa and deep basalt aquifers of Washington State." Environmental Microbiology 5, no. 4 (2003): 267–77. http://dx.doi.org/10.1046/j.1462-2920.2003.00408.x.

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19

Leketa, Khahliso, and Tamiru Abiye. "Using Environmental Tracers to Characterize Groundwater Flow Mechanisms in the Fractured Crystalline and Karst Aquifers in Upper Crocodile River Basin, Johannesburg, South Africa." Hydrology 8, no. 1 (2021): 50. http://dx.doi.org/10.3390/hydrology8010050.

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Environmental isotope tracers were applied in the Upper Crocodile River Basin, Johannesburg, South Africa, to understand the groundwater recharge conditions, flow mechanisms and interactions between surface and subsurface water. Stable isotope analysis indicated that recharge into the fractured quartzite aquifer occurs through direct mechanisms. The high variability in the stable isotope signature of temporal samples from Albert Farm spring indicated the importance of multiple samples for groundwater characterization, and that using a single sample may be yielding biased conclusions. The obser

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20

Manzi, Musa S. D., Raymond J. Durrheim, Kim A. A. Hein, and Nick King. "3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa." GEOPHYSICS 77, no. 5 (2012): WC133—WC147. http://dx.doi.org/10.1190/geo2012-0135.1.

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Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines. Large volumes of water may be stored in solution cavities in dolomitic rocks that overlie the Black Reef (BLR) Formation, while there are several possible sources for methane, namely, coal seams, kerogen found in some gold ore bodies, or methane introduced by igneous intrusions. Potential conduits that may transport water and methane to underground workings were mapped using 3D reflection seismic data. Edge detection attributes successfully identified many faults, some with disp

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21

Glok Galli, Melisa, Matthew E. Damons, Sitembiso Siwawa, et al. "Stable isotope hydrology in fractured and detritic aquifers at both sides of the South Atlantic Ocean: Mar del Plata (Argentina) and the Rawsonville and Sandspruit river catchment areas (South Africa)." Journal of South American Earth Sciences 73 (January 2017): 119–29. http://dx.doi.org/10.1016/j.jsames.2016.12.006.

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22

Ghiglieri, G., R. Balia, G. Oggiano, and D. Pittalis. "Prospecting for safe (low fluoride) groundwater in the Eastern African Rift: the Arumeru District (Northern Tanzania)." Hydrology and Earth System Sciences 14, no. 6 (2010): 1081–91. http://dx.doi.org/10.5194/hess-14-1081-2010.

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Abstract. A multidisciplinary research effort, including geological, hydrogeological, hydro-chemical, geophysical and hydrological investigations, was aimed at locating a source of safe groundwater for a district of northern Tanzania, within the western branch of the East Africa Rift Valley, where water shortage is common and much of the surface water carries unacceptable levels of dissolved fluoride. The 440 km2 study area lies in the northern part of Arumeru district and is dominated by Mt. Meru (4565 m a.s.l.). The local climate is semi-arid, with distinct wet and dry seasons. Four hydrogeo

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23

Selebalo, Itumeleng M., Mary C. Scholes, and Jai K. Clifford-Holmes. "A Systemic Analysis of the Environmental Impacts of Gold Mining within the Blyde River Catchment, a Strategic Water Area of South Africa." Water 13, no. 3 (2021): 301. http://dx.doi.org/10.3390/w13030301.

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Exploratory modelling of the impact of gold mining on groundwater in a strategic water area of South Africa was undertaken. A systems dynamics (SD) model was developed to simulate the impact of gold mining on water quality, focusing on groundwater contamination risk, within the context of competing developmental priorities around water resource development and the socio-economic gains from gold mining. The model also identified interventions to minimise the impacts by the year 2040. The study area was the Blyde River Catchment (BRC), which is part of the Olifants Water Management Area in South

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24

Willems, Luc, André Pouclet, and Jean-Paul Vicat. "Existence of karsts into silicated non-carbonated crystalline rocks in Sahelian and Equatorial Africa, hydrogeological implications." Bulletin de la Société Géologique de France 173, no. 4 (2002): 337–45. http://dx.doi.org/10.2113/173.4.337.

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Abstract Various cavities studied in western Niger and South Cameroon show the existence of important karstic phenomena into metagabbros and gneisses. These large-sized caves resulted from generalized dissolution of silicate formations in spite of their low solubility. Karstification is produced by deep hydrous transfer along lithological discontinuities and fracture net works. The existence of such caves has major implications in geomorphology, under either Sahelian and Equatorial climate, and in hydrogeology and water supply, particularly in the Sahel area. Introduction. – Since a few decade

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25

Okoli, Chucks. "The Hydrometeorology of Niger River Basin." Advanced Materials Research 824 (September 2013): 613–29. http://dx.doi.org/10.4028/www.scientific.net/amr.824.613.

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This paper examines the mean annual cycle of rainfall and general circulation features over the Niger River Basin consisting of mainly West Africa and Central Africa regions. Rainfall is examined using a 1400-station archive compiled by earlier workers. Other circulation features are examined using the NCEPNCAR reanalysis dataset. Important features of the reanalysis zonal wind field are shown to compare well with the seasonal evolution described by the radiosonde observations. In addition to the well-known African easterly jet (AEJ) of the Northern Hemisphere, the seasonal evolution of its So

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26

Winde, Frank. "Turning Water Pollution Sources Into Assets: Exploring Innovative Options Of Using Abandoned Mines For Generating And Storing Renewable Energy." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 13, no. 2 (2020): 6–16. http://dx.doi.org/10.24057/2071-9388-2020-03.

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Through moving large volumes of rock for decades or even centuries from geological underground to surface, industrial scale mining invariably alters the natural local and regional hydrological conditions. Consequences include irreversible changes of flow gradients and water quality in aquifers and streams effected through dewatering, ground subsidence, acid mine drainage, etc. During their lifetime mines spent significant resources and energy on maintaining an ever-increasing diversion from natural hydraulic equilibria through pumping rising volumes of ingress water from ever greater depths, e

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27

Danielopol, Dan L., Christian Griebler, Amara Gunatilaka, and Jos Notenboom. "Present state and future prospects for groundwater ecosystems." Environmental Conservation 30, no. 2 (2003): 104–30. http://dx.doi.org/10.1017/s0376892903000109.

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Ecological and socioeconomic aspects of subterranean hydrosystems have changed during the past 40–50 years. The major environmental pressures (mainly anthropogenic ones) impact the quantity and quality of groundwater resources and the state of subsurface ecosystems, and it is expected that the environmental pressures on groundwater will continue, at least until 2025, unless new environmental policies change this state of affairs. The world demographic increase and the general rise of water demand constitute one of the major environmental pressures on groundwater ecosystems especially in less d

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28

Mokadem, Naziha, Rainier Dennis, and Ingrid Dennis. "Hydrochemical and stable isotope data of water in karst aquifers during normal flow in South Africa." Environmental Earth Sciences 80, no. 16 (2021). http://dx.doi.org/10.1007/s12665-021-09845-7.

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29

Lin, L., and Y. Xu. "A tensor approach to the estimation of hydraulic conductivities in Table Mountain Group aquifers of South Africa." Water SA 32, no. 3 (2007). http://dx.doi.org/10.4314/wsa.v32i3.5262.

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30

Leketa, Khahliso, Tamiru Abiye, and Michael Butler. "Characterisation of groundwater recharge conditions and flow mechanisms in bedrock aquifers of the Johannesburg area, South Africa." Environmental Earth Sciences 77, no. 21 (2018). http://dx.doi.org/10.1007/s12665-018-7911-7.

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31

Mthembu, P. P., V. Elumalai, M. Senthilkumar, and J. Wu. "Investigation of Geochemical Characterization and Groundwater Quality with Special Emphasis on Health Risk Assessment in Alluvial Aquifers, South Africa." International Journal of Environmental Science and Technology, February 16, 2021. http://dx.doi.org/10.1007/s13762-021-03129-0.

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32

Lachassagne, Patrick, Benoît Dewandel, and Robert Wyns. "Review: Hydrogeology of weathered crystalline/hard-rock aquifers—guidelines for the operational survey and management of their groundwater resources." Hydrogeology Journal, April 30, 2021. http://dx.doi.org/10.1007/s10040-021-02339-7.

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AbstractHard rocks or crystalline rocks (i.e., plutonic and metamorphic rocks) constitute the basement of all continents, and are particularly exposed at the surface in the large shields of Africa, India, North and South America, Australia and Europe. They were, and are still in some cases, exposed to deep weathering processes. The storativity and hydraulic conductivity of hard rocks, and thus their groundwater resources, are controlled by these weathering processes, which created weathering profiles. Hard-rock aquifers then develop mainly within the first 100 m below ground surface, within th

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33

Dhansay, T. "Shattered crust: how brittle deformation enables Critical Zone processes beneath southern Africa." South African Journal of Geology, July 9, 2021. http://dx.doi.org/10.25131/sajg.124.0044.

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Abstract The delicate interplay of various Earth’s systems processes in the Critical Zone is vital in ensuring an equilibrium across the different spheres of life. The upper crust forms a thin veneer on the Earth’s surface that is defined by an interconnected network of brittle structures. These brittle structures enable various Earth System processes. Increased anthropogenic interactions within the very upper crust have seemingly resulted in a growing number of negative natural effects, including induced seismicity, mine water drainage and land degradation. Brittle structures across South Afr

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34

T Strydom, JM Nel, M Nel, RM Petersen, and CL Ramjukadh. "The use of Radon (Rn222) isotopes to detect groundwater discharge in streams draining Table Mountain Group (TMG) aquifers." Water SA 47, no. 2 April (2021). http://dx.doi.org/10.17159/wsa/2021.v47.i2.10915.

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Environmental isotopes have been used for decades as natural tracers in studies aimed at understanding complex hydrogeological processes such as groundwater and surface water interactions. Radon (Rn222) is a naturally occurring, radioactive isotope which is produced from radium (Ra226) during the radioactive decay series of uranium (U238). Since U238 is present in most geological substrates, Rn222 is produced in various lithological structures and subsequently transported with groundwater through fractures and pore spaces in an aquifer towards surface water discharge points in rivers and sprin

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35

Oladeji, O. S. "Applying a GIS based DRASTIC Model in the Assessment of Risk to Groundwater Resources Within the Underlying Aquifers in Part of Lagos State, Nigeria." LAUTECH Journal of Civil and Environmental Studies 4, no. 1 (2020). http://dx.doi.org/10.36108/laujoces/0202/40(0190).

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Lagos, Nigeria is one of the megacities in Africa with an estimated annual growth rate of 8%, and its socio-economic growth has continually encouraged influx of people into the city. Hence, this has increased pressure on the underlying water resources with implications for public health and ecological related issues. In this study, anthropogenic induced risk posed to water resources within the underlying aquifers in part of Lagos State, Nigeria, was evaluated using qualitative DRASTIC modelling approach. Geo-hydrological data were acquired for site characterization and setting up of the model.

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