Hydrochemistry and environmental isotopes of spring water and their relation to structure and lithology identified with remote sensing methods in Wadi Araba, Egypt

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dc.contributor.authorWannous, Manal
dc.contributor.authorTheilen-Willige, Barbara
dc.contributor.authorTröger, Uwe
dc.contributor.authorFalk, Marianne
dc.contributor.authorSiebert, Christian
dc.contributor.authorBauer, Florian
dc.date.accessioned2021-12-06T18:34:00Z
dc.date.available2021-12-06T18:34:00Z
dc.date.issued2021-06-04
dc.description.abstractSprings located at the historical sites of Wadi Araba (Eastern Desert of Egypt) and emerging from the escarpments of the Northern and Southern Galala Plateaus were investigated. A combination of methods, including hydrochemistry, stable and radioisotope composition, and structural analyses based on satellite data, provided information about the structure of the subsurface and the derived groundwater flow paths. Satellite images reveal karst features within the northern plateau, e.g. conical landforms. Karstic caves were documented along both escarpments. Chemical analysis of floodwater from Wadi Araba indicates higher concentrations of terrestrial salts compared to floodwaters from central and southern parts of the desert. δ 18 O and δ 2 H signatures in spring waters resemble those of floodwater and fall on the global meteoric water line, confirming their fast infiltration with minor influence of evaporation. The aquifer feeding the springs of the Northern Galala Plateau has low retention and the springs dry out quickly, even after heavy rainfall. Contrastingly, 3 H activities in springs emerging from the Southern Galala Plateau refer to much slower subsurface passage. With respect to 3 H content (3.8 TU) in recent flood waters, the spring water at Southern Galala Plateau contains about 40% recently recharged groundwater. However, its largest spring—the St. Antony spring—discharges water with a radiocarbon age of about 15,000 years. In combination with this spring’s constant and high discharge over a period of several months, that age estimate suggests a large reservoir with moderate to high retention.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2021en
dc.identifier.eissn1435-0157
dc.identifier.issn1431-2174
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/13985
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-12758
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc550 Geowissenschaftende
dc.subject.otherEgypten
dc.subject.othergroundwater rechargeen
dc.subject.otherlineamentsen
dc.subject.othermean residence timeen
dc.subject.otherstable isotopesen
dc.titleHydrochemistry and environmental isotopes of spring water and their relation to structure and lithology identified with remote sensing methods in Wadi Araba, Egypten
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1007/s10040-021-02343-xen
dcterms.bibliographicCitation.issue6en
dcterms.bibliographicCitation.journaltitleHydrogeology Journalen
dcterms.bibliographicCitation.originalpublishernameSpringer Natureen
dcterms.bibliographicCitation.originalpublisherplaceBerlin ; Heidelbergen
dcterms.bibliographicCitation.pageend2266en
dcterms.bibliographicCitation.pagestart2245en
dcterms.bibliographicCitation.volume29en
tub.accessrights.dnbfreeen
tub.affiliationZentralinstitut El Gounade
tub.affiliation.facultyZentralinstitut El Gounade
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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