Titre :
|
Analysis of hydraulic conductivity averaging schemes for one-dimensional, steady-state unsaturated flow
|
Auteurs :
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R. Srivastava ;
A. Guzman-guzman
|
Type de document :
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article/chapitre/communication
|
Année de publication :
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1995
|
Format :
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p. 946-952
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Langues:
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= Anglais
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Catégories :
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HYDROLOGIE ET HYDRAULIQUE
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Mots-clés:
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CONDUCTIVITE HYDRAULIQUE
;
MILIEU POREUX
;
MILIEU NON SATURE
;
ECOULEMENT PERMANENT
;
MODELE NUMERIQUE
|
Résumé :
|
The evaluation of average properties over a block or element is required for most numerical methods used for the solution of unsaturated flow equations. In this study, it is shown that the accuracy of a particular averaging scheme depends on the type of model used for unsaturated material properties. A systematic and thorough error analysis of the averaging techniques for some commonly used soil characteristic curves is performed. It is shown that the two-point Gaussian quadrature is consistently more accurate than the arithmetic, geometric, and harmonic means for all types of constutive models.
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Source :
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Ground water, vol.33, n°6
|