High-resolution aquifer analog of fluvial-aeolian sediments of the Guarani aquifer system

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorHöyng, Dominik
dc.creatorD'Affonseca, Fernando Mazo
dc.creatorBayer, Peter
dc.creatorde Oliveira, Edson Gomes
dc.creatorPerinotto, José Alexandre de Jesus
dc.creatorReis, Fábio
dc.creatorWeiß, Holger
dc.creatorGrathwohl, Peter
dc.date2014-05-27T11:30:08Z
dc.date2016-10-25T18:52:32Z
dc.date2014-05-27T11:30:08Z
dc.date2016-10-25T18:52:32Z
dc.date2013-08-07
dc.date.accessioned2017-04-06T02:34:10Z
dc.date.available2017-04-06T02:34:10Z
dc.identifierEnvironmental Earth Sciences, p. 1-14.
dc.identifier1866-6280
dc.identifier1866-6299
dc.identifierhttp://hdl.handle.net/11449/76231
dc.identifierhttp://acervodigital.unesp.br/handle/11449/76231
dc.identifier10.1007/s12665-013-2684-5
dc.identifierWOS:000333014500009
dc.identifier2-s2.0-84880937692
dc.identifierhttp://dx.doi.org/10.1007/s12665-013-2684-5
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/896933
dc.descriptionThe Guarani aquifer system (GAS) represents one of the biggest aquifers in the world and is the most relevant groundwater resource in South America. For the first time, by combining field and laboratory measurements, a high-resolution aquifer analog model of fluvial-aeolian sediments of the GAS in São Paulo State (Brazil) is constructed. Three parallel sections of frontal outcrops, 28 m × 5.8 m, and two parallel sections of lateral outcrops, 7 m × 5.8 m, are recorded during open-pit mining of sandy sediments and describe in detail the three-dimensional distribution of the local lithofacies and hydrofacies. Variations of hydraulic conductivity, K, and porosity, n, are resolved on the centimeter scale, and the most permeable units of the fluvial-aeolian facies association are identified. The constructed aquifer analog model shows moderate hydraulic heterogeneity and a mean K value of 1.36 × 10-4 m/s, which is greater than the reported range of K values for the entire GAS in São Paulo State. The results suggest that the examined sedimentary unit constitutes a relevant portion of the GAS in São Paulo State in the context of groundwater extraction and pollution. Moreover, the constructed aquifer analog is considered an ideal basis for future numerical model experiments, aiming at in-depth understanding of the groundwater flow and contaminant transport patterns at this GAS portion or at comparable fluvial-aeolian facies associations. © 2013 Springer-Verlag Berlin Heidelberg.
dc.languageeng
dc.relationEnvironmental Earth Sciences
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectFluvial-aeolian sediments
dc.subjectGroundwater reservoir analog model
dc.subjectGuarani aquifer
dc.subjectPirambóia Formation
dc.subjectReservoir characterization
dc.titleHigh-resolution aquifer analog of fluvial-aeolian sediments of the Guarani aquifer system
dc.typeOtro


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