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Characterization of the Temporal Evolution of Soil Hydraulic Properties Under Anthropomorphic Conditions By X-Ray Tomography.

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Périard, Yann; Gumière, Silvio José; Rousseau, Alain N.; Hallema, Dennis W.; Caron, Jean (2014). Characterization of the Temporal Evolution of Soil Hydraulic Properties Under Anthropomorphic Conditions By X-Ray Tomography. In: ASA, CSSA, & SSSA International Annual Meeting, 2-5 novembre 2014, Long Beach, États-Unis.

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Résumé

The installation of drainage systems may cause anthropic-induced evolution of soil profile. In fact, natural consolidation (drainage and recharge cycles and flooding), filtration and clogging soil pores by colloidal particle accelerated by water management will alter the hydrodynamic behavior of the soil (Gaillard et al., 2007; Bodner et al., 2013). Today, advances in the field of tomography imagery allow the study a number of physicals processes of soils especially for the transport of colloidal particles (Gaillard et al., 2007) and consolidation processes (Pires et al, 2007). The main objective of this work is to evaluate the temporal evolution of hydraulic properties of a sandy soil during repeated drainage and recharge cycles using a medical CT-scan. A soil columns laboratory experiment was setup in fall 2013, pressure head, input and output water flow, tracer monitoring (KBr and ZrO2) and tomographic analyses have been used to quantify the temporal evolution of the soil hydraulic properties. The results showed that the drainage and recharge accelerated cycles have a high effect on soil hydraulic properties evolution in most of the time reducing the soil drainage capacity. Knowledge about the mechanisms responsible for this anthropic-induced soil alteration is capital for water management in intense agricultural systems, such as cranberry farms. This information may allow us to predict soil evolution according to soil texture, drainage system design and water management, in order to better anticipate and control their future negative effects.

Type de document: Document issu d'une conférence ou d'un atelier
Informations complémentaires: Affiche
Mots-clés libres: sol; propriété hydraulique; conditions anthropomorphiques; tomographie; rayon X
Centre: Centre Eau Terre Environnement
Date de dépôt: 12 nov. 2020 14:26
Dernière modification: 12 nov. 2020 14:26
URI: http://espace.inrs.ca/id/eprint/4081

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