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Infiltration under constant head and falling head conditions

Identifieur interne : 00B685 ( Main/Exploration ); précédent : 00B684; suivant : 00B686

Infiltration under constant head and falling head conditions

Auteurs : D. E. Elrick [Canada] ; R. Angulo-Jaramillo [France] ; D. J. Fallow [Canada] ; W. D. Reynolds [Canada] ; G. W. Parkin [Canada]

Source :

RBID : Pascal:02-0472539

Descripteurs français

English descriptors

Abstract

Prediction of the infiltration of water into field soils requires knowledge of the field-saturated hydraulic conductivity and a second parameter, such as the matric flux potential (corresponding to field saturation), or the Green and Ampt wetting-front pressure head, or the alpha parameter. Analytical solutions of 1-D infiltration under both constant and falling-head conditions are reviewed and several new solutions are developed based on the Green and Ampt assumptions. A laboratory experiment using the falling head technique is analyzed using several approximate analytical solutions.


Affiliations:


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Le document en format XML

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<term>biosphere</term>
<term>bulk density</term>
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<term>hydraulic conductivity</term>
<term>infiltration</term>
<term>laboratory studies</term>
<term>prediction</term>
<term>saturation</term>
<term>soils</term>
<term>solution</term>
<term>sorption</term>
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<term>Etude laboratoire</term>
<term>Etude expérimentale</term>
<term>Infiltration</term>
<term>Prévision</term>
<term>Eau surface</term>
<term>Sol</term>
<term>Conductivité hydraulique</term>
<term>Saturation</term>
<term>Solution</term>
<term>Biosphère</term>
<term>Sorption</term>
<term>Densité apparente</term>
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<div type="abstract" xml:lang="en">Prediction of the infiltration of water into field soils requires knowledge of the field-saturated hydraulic conductivity and a second parameter, such as the matric flux potential (corresponding to field saturation), or the Green and Ampt wetting-front pressure head, or the alpha parameter. Analytical solutions of 1-D infiltration under both constant and falling-head conditions are reviewed and several new solutions are developed based on the Green and Ampt assumptions. A laboratory experiment using the falling head technique is analyzed using several approximate analytical solutions.</div>
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