Publicação:
Bridging hydraulic diffusivity from aquifer to particle-size scale: a study on loess sediments from southwest Hungary

dc.contributor.authorPacheco, F. A. L.
dc.contributor.authorLandim, P. M. B. [UNESP]
dc.contributor.authorSzocs, Teodora
dc.contributor.institutionTrás-os-Montes and Alto Douro University
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionGeological and Geophysical Institute of Hungary
dc.date.accessioned2015-10-21T20:17:31Z
dc.date.available2015-10-21T20:17:31Z
dc.date.issued2015-02-01
dc.description.abstractIn situ megascale hydraulic diffusivities (D) of a confined loess aquifer were estimated at various scales (10 <= L <= 1500 m) by a finite difference model, and laboratory microscale diffusivities of a loess sample by empirical formulas. A scatter plot reveals that D fits to a single power function of L, providing that microscale diffusivities are assigned to L = 1 m and that differences in diffusivity observed between micro- and megascales are assigned to medium heterogeneity appraised by variations in the curvature and slope of natural hydraulic head waves propagating through the aquifer. Subsequently, a general power relationship between D and L is defined where the base and exponent terms stand for the aquifer storage capability under a confined regime of flow, for the microscale hydraulic conductivity and specific yield of loess, and for the changes in curvature and slope of hydraulic head waves relative to values defined at unit scale.[GRAPHICS]Editor Z.W. Kundzewiczen
dc.description.affiliationDepartment of Geology and Chemistry Research Center, Trás-os-Montes and Alto Douro University, 5001-801 Vila Real, Portugal.
dc.description.affiliationHydrogeological Department, Geological and Geophysical Institute of Hungary, H-1143 Budapest, Hungary.
dc.description.affiliationUnespApplied Geology Department, São Paulo State University, 13506-900 Rio Claro, Brazil
dc.format.extent269-284
dc.identifierhttp://www.tandfonline.com/doi/abs/10.1080/02626667.2014.889831
dc.identifier.citationHydrological Sciences Journal-journal Des Sciences Hydrologiques. Abingdon: Taylor & Francis Ltd, v. 60, n. 2, p. 269-284, 2015.
dc.identifier.doi10.1080/02626667.2014.889831
dc.identifier.issn0262-6667
dc.identifier.lattes7206664999934534
dc.identifier.urihttp://hdl.handle.net/11449/129059
dc.identifier.wosWOS:000347703000007
dc.language.isoeng
dc.publisherTaylor &Francis Ltd
dc.relation.ispartofHydrological Sciences Journal-journal Des Sciences Hydrologiques
dc.relation.ispartofjcr2.061
dc.relation.ispartofsjr0,939
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHydraulic diffusivityen
dc.subjectIoessen
dc.subjectHydraulic head waveen
dc.subjectGrain-size distributionen
dc.subjectConfined aquiferen
dc.subjectScaleen
dc.titleBridging hydraulic diffusivity from aquifer to particle-size scale: a study on loess sediments from southwest Hungaryen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderTaylor &francis Ltd
dspace.entity.typePublication
unesp.author.lattes7206664999934534
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
unesp.departmentGeologia Aplicada - IGCEpt

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