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Titre :
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Analysing problems in describing field and laboratory measured soil hydraulic properties
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|
Auteurs :
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G. Wessolek ;
R. Plagge ;
F. Leij ;
M. Van Genuchten
|
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Type de document :
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article/chapitre/communication
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|
Année de publication :
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1994
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|
Format :
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p. 93-110
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Langues:
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= Anglais
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Catégories :
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EAU
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Mots-clés:
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SOL
;
CARACTERISTIQUE HYDRODYNAMIQUE
;
ESSAI AU LABORATOIRE
;
ESSAI IN SITU
;
CONDUCTIVITE HYDRAULIQUE
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Résumé :
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Accurate in situ determination of unsaturated soil hydraulic properties is often not feasible because of natural variability of most field soils, and because of instrumental limitations. Therefore the soil hydraulic properties are often measured in the laboratory, or derived by computer models using simple standard laboratory methods. This paper analyses problems in describing field hydraulic properties of a Ap horizon of a silty loam, basing on data from different laboratory methods: (i) A standard pressure plate apparatus and (ii) a constant-head permeameter were used to measure the static retention characteristics and the saturated hydraulic conductivity independently. (iii) An instantaneous profile method was applied to measure water retention and conductivity simultanously.
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Source :
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Geoderma, vol.64, n°1-2
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