Identification of Point Sources of Metal Pollution in the Berg River, Western Cape, South Africa

Jackson, Vanessa Angela; Paulse, A.N.; Odendaal, James P; Khan, Wesaal

doi:10.1007/s11270-013-1477-5

Cited by 5 publications

(8 citation statements)

References 11 publications

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“…The sites situated along the Franschhoek River are predominantly used for urban settlements. de Villiers (2007) and Jackson et al (2013) reported that as observed in the current study, the nutrient concentrations of the Berg River increase with distance downstream. This indicates that anthropogenic activities in the study area negatively impact the water resources.…”

Section: Nutrient Concentrationssupporting

confidence: 81%

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Application of multi-method approach to assess groundwater–surface water interactions, for catchment management

Madlala

Oberholster

2018

Int. J. Environ. Sci. Technol.

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Madlala, T. et al. (2018). Application of multi-method approach to assess groundwater-surface water interaction, for catchment management. AbstractGlobally, the dependence of river systems to delayed discharge of subsurface water to augment flows during dry seasons is well documented. Discharge of fresh subsurface water can dilute concentrated river flow quality during reduced flow. Observed and reported results on the Berg River's declining water quantity and quality are a concern to the regions socio-economic growth and environmental integrity. Understanding the role of subsurface water discharges on the quantity and quality of receiving surface water courses can improve their management during dry periods. A case study was designed and implemented in the upper Berg River catchment in the Western Cape Province of South Africa to assess the influence of groundwater-surface water interaction on water quantity and quality. This study aimed to quantify and characterize the quality of subsurface water available in the upper catchment to improve observed declining water quality downstream. Hydrograph separation provided estimates of water fluxes during 2012-2014 low and high flow periods, while hydrochemical analysis provided insights on impacts of major land use activity in this catchment on water resources. Hydrograph separation analysis indicated that the Berg River is 37.9% dependent on subsurface water discharges annually. Dominant Na-Cl-type water indicates the quality of water from the upper Berg River is largely affected by natural processes including short residence times of aquifer water, rock-water interactions and atmospheric deposition of NaCl ions. These results provide insights for suggesting management options to be implemented to protect subsurface water for continued dilution and water resources management in the lower catchments. Materials and methods Study site descriptionThe Berg River catchment in the Western Cape of South Africa is an important source of water to the greater city of Cape Town, its surrounding towns and dependent ecosystems.

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Section: Nutrient Concentrationssupporting

confidence: 81%

“…4 and Table 1). With these activities, understand GW-SW interactions with recognition of the reported declining surface water quality and also what role this interaction plays in remediating/diluting this contamination is important (Bugan 2008;de Villiers 2007;Jackson et al 2013;Oberholster et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Application of multi-method approach to assess groundwater–surface water interactions, for catchment management

Madlala

Oberholster

2018

Int. J. Environ. Sci. Technol.

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“…The water bodies in Africa are increasingly at the risk of PTEs exposure [57], a sequel to the growing human population leading to broadening settlement, urbanization and concomitant industrialization [58][59][60]. The general result is commonly the increasing discharge of completely untreated or poorly treated domestic and industrial effluent, responsible for the largest origin of heavy metal contamination and consequently, generate a continuous rise in metallic contamination in water bodies in most of the globe [59,61].…”

Section: Ptes Sources In African Water Bodies: An Overviewmentioning

confidence: 99%

“…In particular, sources of heavy metal pollution are either natural or anthropogenic [59], which are distributed across settlements. The greatest source of heavy metal pollution in the rural settlements are natural while that of the urban areas are fundamentally anthropogenic [59,60]. However, 'bossy' and at times illegal mining activities, in some of the rural areas can also contribute to heavy mining pollution of some fresh water bodies [62].…”

Section: Ptes Sources In African Water Bodies: An Overviewmentioning

confidence: 99%

“…The list goes on to include draining of sewerage, dumping of hospital wastes, recreational activities, shipping, mining, breweries, tanning, fishing, and agro-processing factories [64,65]. Further activities include urban storm water runoff, atmospheric sources, boating, biocides runoff, nutrients and pathogens from agricultural lands, urban areas and informal settlements [60], metal fabrication and scraping industries, and indiscriminate use of heavy metal-containing fertilizer and pesticides in agricultural fields [65]. For instance, Reza and co-worker [65] reported that mine water, run-off from abandoned watersheds and associated industrial discharges are the major source of heavy metal contamination, total dissolved solids (TDS) and low pH of streams in the mining area [66][67][68][69].…”

Section: Ptes Sources In African Water Bodies: An Overviewmentioning

confidence: 99%

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An Assessment of Land Use and Land Cover Changes and Its Impact on the Surface Water Quality of the Crocodile River Catchment, South Africa

Samuel¹,

Bett²,

Okpara³

et al. 2022

River Deltas Research - Recent Advances

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The degradation of surface water by anthropogenic activities is a global phenomenon. Surface water in the upper Crocodile River has been deteriorating over the past few decades by increased anthropogenic land use and land cover changes as areas of non-point sources of contamination. This study aimed to assess the spatial variation of physicochemical parameters and potentially toxic elements (PTEs) contamination in the Crocodile River influenced by land use and land cover change. 12 surface water samplings were collected every quarter from April 2017 to July 2018 and were analyzed by inductive coupled plasma spectrometry-mass spectrometry (ICP-MS). Landsat and Spot images for the period of 1999–2009 - 2018 were used for land use and land cover change detection for the upper Crocodile River catchment. Supervised approach with maximum likelihood classifier was used for the classification and generation of LULC maps for the selected periods. The results of the surface water concentrations of PTEs in the river are presented in order of abundance from Mn in October 2017 (0.34 mg/L), followed by Cu in July 2017 (0,21 mg/L), Fe in April 2017 (0,07 mg/L), Al in July 2017 (0.07 mg/L), while Zn in April 2017, October 2017 and April 2018 (0.05 mg/L). The concentrations of PTEs from water analysis reveal that Al, (0.04 mg/L), Mn (0.19 mg/L) and Fe (0.14 mg/L) exceeded the stipulated permissible threshold limit of DWAF (< 0.005 mg/L, 0.18 mg/L and 0.1 mg/L) respectively for aquatic environments. The values for Mn (0.19 mg/L) exceeded the permissible threshold limit of the US-EPA of 0.05 compromising the water quality trait expected to be good. Seasonal analysis of the PTEs concentrations in the river was significant (p > 0.05) between the wet season and the dry season. The spatial distribution of physicochemical parameters and PTEs were strongly correlated (p > 0.05) being influenced by different land use type along the river. Analysis of change detection suggests that; grassland, cropland and water bodies exhibited an increase of 26 612, 17 578 and 1 411 ha respectively, with land cover change of 23.42%, 15.05% and 1.18% respectively spanning from 1999 to 2018. Bare land and built-up declined from 1999 to 2018, with a net change of - 42 938 and − 2 663 ha respectively witnessing a land cover change of −36.81% and − 2.29% respectively from 1999 to 2018. In terms of the area under each land use and land cover change category observed within the chosen period, most significant annual change was observed in cropland (2.2%) between 1999 to 2009. Water bodies also increased by 0.1% between 1999 to 2009 and 2009 to 2018 respectively. Built-up and grassland witness an annual change rate in land use and land cover change category only between 2009 to 2018 of 0.1% and 2.7% respectively. This underscores a massive transformation driven by anthropogenic activities given rise to environmental issues in the Crocodile River catchment.

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Investigation into the bacterial diversity of sediment samples obtained from Berg River, Western Cape, South Africa

et al. 2021

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Identification of Point Sources of Metal Pollution in the Berg River, Western Cape, South Africa

Cited by 5 publications

References 11 publications

Application of multi-method approach to assess groundwater–surface water interactions, for catchment management

Application of multi-method approach to assess groundwater–surface water interactions, for catchment management

An Assessment of Land Use and Land Cover Changes and Its Impact on the Surface Water Quality of the Crocodile River Catchment, South Africa

Investigation into the bacterial diversity of sediment samples obtained from Berg River, Western Cape, South Africa

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