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

dc.contributorTrás-os-Montes and Alto Douro University
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorGeological and Geophysical Institute of Hungary
dc.creatorPacheco, F. A. L.
dc.creatorLandim, P. M. B. [UNESP]
dc.creatorSzocs, Teodora
dc.date2015-10-21T20:17:31Z
dc.date2015-10-21T20:17:31Z
dc.date2015-02-01
dc.date.accessioned2023-09-12T06:47:49Z
dc.date.available2023-09-12T06:47:49Z
dc.identifierhttp://www.tandfonline.com/doi/abs/10.1080/02626667.2014.889831
dc.identifierHydrological Sciences Journal-journal Des Sciences Hydrologiques. Abingdon: Taylor & Francis Ltd, v. 60, n. 2, p. 269-284, 2015.
dc.identifier0262-6667
dc.identifierhttp://hdl.handle.net/11449/129059
dc.identifier10.1080/02626667.2014.889831
dc.identifierWOS:000347703000007
dc.identifier7206664999934534
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8778400
dc.descriptionIn 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. Kundzewicz
dc.descriptionDepartment of Geology and Chemistry Research Center, Trás-os-Montes and Alto Douro University, 5001-801 Vila Real, Portugal.
dc.descriptionHydrogeological Department, Geological and Geophysical Institute of Hungary, H-1143 Budapest, Hungary.
dc.descriptionApplied Geology Department, São Paulo State University, 13506-900 Rio Claro, Brazil
dc.format269-284
dc.languageeng
dc.publisherTaylor &Francis Ltd
dc.relationHydrological Sciences Journal-journal Des Sciences Hydrologiques
dc.relation2.061
dc.relation0,939
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHydraulic diffusivity
dc.subjectIoess
dc.subjectHydraulic head wave
dc.subjectGrain-size distribution
dc.subjectConfined aquifer
dc.subjectScale
dc.titleBridging hydraulic diffusivity from aquifer to particle-size scale: a study on loess sediments from southwest Hungary
dc.typeArtigo


Este ítem pertenece a la siguiente institución