Investigation of groundwater salinity using geophysical and geochemical approaches: Heuningnes catchment coastal aquifer. Western Cape Province, South Africa

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dc.contributor.authorMokoena, P
dc.contributor.authorManyama, K
dc.contributor.authorvan Bever Donker, J
dc.date.accessioned2021-05-03T11:05:11Z
dc.date.available2021-05-03T11:05:11Z
dc.date.issued2021
dc.description.abstractSeawater intrusion is recognised as a major factor affecting the quality of groundwater in coastal aquifers around the world. To determine the occurrence and extent of saline groundwater intrusion prevailing in the Heuningnes Catchment, a 2D resistivity imaging survey was carried out in three sites within the catchment. Eleven resistivity profile lines were conducted using the multi-electrode ABEM SAS resistivity meter system, employing the Wenner Array to map the extent of saline groundwater. A 2D resistivity image was acquired for these resistivity profile lines and the data were processed using Res2DINV software to produce the 2D inverse resistivity models. The interpretation of the resistivity models revealed three resistivity zones. The first zone is characterised by low resistivity (1–3 Ω.m); this represents an aquifer filled with saline water. The second resistivity zone has values ranging from (3–30 Ω.m); this represents a brackish saturated formation. The third resistivity zone denotes a sandy layer/sandstone saturated with freshwater having high resistivity values above 30 Ω.m. Geochemical analysis results of water samples at 11 locations along the electrical resistivity profile lines also suggest high salinity, indicated by high levels of Cl−, Na+, Total Dissolved Solids, and Electrical Conductivity.en_US
dc.identifier.citationMokoena, P. et al. (2021). Investigation of groundwater salinity using geophysical and geochemical approaches: Heuningnes catchment coastal aquifer. Western Cape Province, South Africa. Environmental Earth Sciences ,80(5),191en_US
dc.identifier.issn1866-6280
dc.identifier.uri10.1007/s12665-021-09507-8
dc.identifier.urihttp://hdl.handle.net/10566/6125
dc.language.isoenen_US
dc.publisherSpringer Science and Business Media Deutschland GmbHen_US
dc.subjectCoastal aquifersen_US
dc.subjectElectrical resistivityen_US
dc.subjectGeochemistryen_US
dc.subjectSaline groundwateren_US
dc.titleInvestigation of groundwater salinity using geophysical and geochemical approaches: Heuningnes catchment coastal aquifer. Western Cape Province, South Africaen_US
dc.typeArticleen_US

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