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Contribution of the time domain electromagnetic method to the study of the Kalahari transboundary multilayered aquifer systems in Southern Angola

2024-09Journal article Open access
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dc.contributor.authorFrancés, Alain Pascal
dc.contributor.authorRamalho, Elsa
dc.contributor.authorSantos, Fernando Monteiro
dc.contributor.authorLlorente, J.
dc.contributor.authorMateus, T.
dc.contributor.authorMartín-Banda, Raquel
dc.contributor.authorCuervo, I.
dc.contributor.authorLobón, Jose Luis Garcia
dc.contributor.authorDala, V.
dc.contributor.authorDitutala, M.
dc.contributor.authorFamorosa, A.
dc.contributor.authorVictorino, Américo da Mata
dc.date.accessioned2024-10-02T13:24:00Z
dc.date.available2024-10-02T13:24:00Z
dc.date.issued2024-09
dc.description.abstractABSTRACT: The Cunene Province (Southern Angola) is facing recurrent and pluriannual droughts. Surface water supply could be reinforced using the groundwater resources of the multilayered aquifer systems (MAS) hosted in the siliciclastic sediments of the Kalahari Group. The MAS were first identified in the early 2000s in Northern Namibia and recently in the Cunene Province, by studies of the PLANAGEO project based on modern processing and reinterpretation of legacy data from the 1960s and 1970s (electrical resistivity data and deep boreholes). This article presents the results of a time domain electromagnetic (TDEM) survey conducted in the Cunene Province to: (i) contribute to the design of the hydrogeological conceptual model of the transboundary MAS, namely their geometry and extension; (ii) validate the reprocessing of the legacy data; and (iii) guide the future location of boreholes. Results depict the geometry of the sedimentary basin and the characterization of the MAS, with particular emphasis on the intermediate and deep aquifers. The borehole siting, based on the interpretation of the new TDEM data and the legacy data (clay markers in borehole logs), was successful, with a good agreement between estimated and observed horizons of the deep aquifers. However, the presence of clayey layers, a clay-rich matrix in the detrital deposits and saline/brackish groundwater led to uncertainties in the interpretation of the electrical transects. As such, recommendations are made to improve future data collection and mapping of the MAS.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFrancés, Alain Pascal; Ramalho, Elsa; Santos, Fernando Monteiro; Llorente, J.; Mateus, T.; Matín-Banda, R.; Cuervo, I.; Lobón, Jose Luis Garcia; Dala, V.; Ditutala, M.; Famorosa, A.& Victorino, Américo da Mata (2024) Contribution of the time domain electromagnetic method to the study of the Kalahari transboundary multilayered aquifer systems in Southern Angola. In: Hydrogeology Journal, 2024 [Early Acess]. https://doi.org/10.1007/s10040-024-02822-xpt_PT
dc.identifier.doi10.1007/s10040-024-02822-xpt_PT
dc.identifier.eissn1435-0157
dc.identifier.issn1431-2174
dc.identifier.urihttp://hdl.handle.net/10400.9/4360
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relation.publisherversionhttps://doi.org/10.1007/s10040-024-02822-xpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectKalahari-Ohangwena aquifer systempt_PT
dc.subjectHydrogeophysicspt_PT
dc.subjectTime domain electromagneticspt_PT
dc.subjectAngolapt_PT
dc.titleContribution of the time domain electromagnetic method to the study of the Kalahari transboundary multilayered aquifer systems in Southern Angolapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleHydrogeology Journalpt_PT
person.familyNameFrancés
person.familyNameRamalho
person.givenNameAlain Pascal
person.givenNameElsa
person.identifier1205453
person.identifier.ciencia-id951B-44AA-0717
person.identifier.ciencia-idC516-4C8B-2F41
person.identifier.orcid0000-0002-1823-3094
person.identifier.orcid0000-0002-9268-271X
person.identifier.ridK-8254-2012
person.identifier.scopus-author-id36514607700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicatione9e689af-1372-47f5-ba0a-48637bf2e94b
relation.isAuthorOfPublicationf93e8937-2135-47c1-8a26-ad88f6687a12
relation.isAuthorOfPublication.latestForDiscoveryf93e8937-2135-47c1-8a26-ad88f6687a12

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