Publicação: Fractal concepts in relation to soil water diffusivity
dc.contributor.author | Guerrini, I. A. | |
dc.contributor.author | Swartzendruber, D. | |
dc.contributor.institution | UNIV NEBRASKA | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T15:22:13Z | |
dc.date.available | 2014-05-20T15:22:13Z | |
dc.date.issued | 1997-11-01 | |
dc.description.abstract | Fractal geometry would appear to offer promise for new insight on water transport in unsaturated soils, This study was conducted to evaluate possible fractal influence on soil water diffusivity, and/or the relationships from which it arises, for several different soils, Fractal manifestations, consisting of a time-dependent diffusion coefficient and anomalous diffusion arising out of fractional Brownian motion, along with the notion of space-filling curves were gleaned from the literature, It was found necessary to replace the classical Boltzmann variable and its time t(1/2) factor with the basic fractal power function and its t(n) factor, For distinctly unsaturated soil water content theta, exponent n was found to be less than 1/2, but it approached 1/2 as theta approached its sated value, This function n = n(theta), in giving rise to a time-dependent, anomalous soil water diffusivity D, was identified with the Hurst exponent H of fractal geometry, Also, n approaching 1/2 at high water content is a behavior that makes it possible to associate factal space filling with soil that approaches water saturation, Finally, based on the fractally interpreted n = n(theta), the coalescence of both D and 8 data is greatly improved when compared with the coalescence provided by the classical Boltzmann variable. | en |
dc.description.affiliation | UNIV NEBRASKA,DEPT AGRON,LINCOLN,NE 68583 | |
dc.description.affiliation | STATE UNIV SAO PAULO,DEPT FIS & BIOFIS,BOTUCATU,SP,BRAZIL | |
dc.description.affiliationUnesp | STATE UNIV SAO PAULO,DEPT FIS & BIOFIS,BOTUCATU,SP,BRAZIL | |
dc.format.extent | 778-784 | |
dc.identifier | http://dx.doi.org/10.1097/00010694-199711000-00002 | |
dc.identifier.citation | Soil Science. Baltimore: Williams & Wilkins, v. 162, n. 11, p. 778-784, 1997. | |
dc.identifier.doi | 10.1097/00010694-199711000-00002 | |
dc.identifier.issn | 0038-075X | |
dc.identifier.lattes | 3790665066857769 | |
dc.identifier.uri | http://hdl.handle.net/11449/33232 | |
dc.identifier.wos | WOS:A1997YH70400002 | |
dc.language.iso | eng | |
dc.publisher | Williams & Wilkins | |
dc.relation.ispartof | Soil Science | |
dc.relation.ispartofjcr | 1.387 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Web of Science | |
dc.title | Fractal concepts in relation to soil water diffusivity | en |
dc.type | Artigo | |
dcterms.license | http://journals.lww.com/_layouts/oaks.journals/nih.aspx | |
dcterms.rightsHolder | Williams & Wilkins | |
dspace.entity.type | Publication | |
unesp.author.lattes | 3790665066857769 | |
unesp.campus | Universidade Estadual Paulista (UNESP), Instituto de Biociências, Botucatu | pt |
unesp.department | Física e Biofísica - IBB | pt |
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