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New analytical model for cumulative infiltration into dual-permeability soils

Laurent Lassabatere, Deniz Yilmaz, Xavier Peyrard, Pierre Emmanuel Peyneau, Thomas Lenoir, Jiri Simunek and Rafael Angulo-Jaramillo
New analytical model for cumulative infiltration into dual-permeability soils
Vadose Zone Journal (December 2014) 13 (12)

Abstract

In the vadose zone, preferential flow and transport are much more common than uniform water flow and solute transport. In recent decades, several models have been developed for preferential water flow and physical nonequilibrium solute transport. Among these models, the dual-permeability approach is an interesting tool for the conceptualization and modeling of preferential flow. However, this approach has been mainly studied from a numerical point of view. In this study, we developed a new analytical model for water infiltration into dual-permeability soils. The model is based on the analytical model originally proposed for single-permeability soils. The proposed model relies on the assumption that the water exchange rate at the interface between the matrix and fast-flow regions does not change cumulative infiltration at the soil surface, so that the total cumulative infiltration can be set equal to the sum of independent cumulative infiltrations into each region. This assumption was investigated using numerically generated data. The proposed analytical model was then used to evaluate the effects of fast-flow region hydraulic properties and hydraulic conditions on total cumulative infiltration for the case of single- and multi-tension water infiltration experiments. Finally, both single- and dual-permeability models were evaluated with respect to their ability to fit experimental data and associated problems of non-uniqueness in optimized parameters. The proposed model could serve as a new tool for modeling and characterizing preferential flow in the vadose zone.


ISSN: 1539-1663
Serial Title: Vadose Zone Journal
Serial Volume: 13
Serial Issue: 12
Title: New analytical model for cumulative infiltration into dual-permeability soils
Affiliation: Universite de Lyon 1, Laboratoire d'Ecologie des Hydrosystemes Naturels et Anthropises, Valx-en-Velin, France
Published: 201412
Text Language: English
Publisher: Soil Science Society of America, Madison, WI, United States
Number of pages: 15
References: 73
Accession Number: 2015-007750
Categories: Soils
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
Secondary Affiliation: L'Universite Nantes Angers Le Mans, FRA, FranceInstitut National de Recherche en Sciences et Technologies pour l'Environnement et l'Agriculture, FRA, FranceUniversity of California, Riverside, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201504
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