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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPacheco, F. A. L.
dc.creatorLandim, P. M. B.
dc.creatorSzocs, Teodora
dc.date2015-10-21T20:17:31Z
dc.date2016-10-25T21:08:15Z
dc.date2015-10-21T20:17:31Z
dc.date2016-10-25T21:08:15Z
dc.date2015-02-01
dc.date.accessioned2017-04-06T09:06:38Z
dc.date.available2017-04-06T09:06:38Z
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.identifierhttp://acervodigital.unesp.br/handle/11449/129059
dc.identifierhttp://dx.doi.org/10.1080/02626667.2014.889831
dc.identifierWOS:000347703000007
dc.identifierhttp://www.tandfonline.com/doi/abs/10.1080/02626667.2014.889831
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/939614
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.languageeng
dc.publisherTaylor &Francis Ltd
dc.relationHydrological Sciences Journal-journal Des Sciences Hydrologiques
dc.rightsinfo:eu-repo/semantics/closedAccess
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.typeOtro


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