Pore network modeling of the electrical signature of solute transport in dual-domain media

Détails

ID Serval
serval:BIB_E48FD63D7AF1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Pore network modeling of the electrical signature of solute transport in dual-domain media
Périodique
Geophysical Research Letters
Auteur(s)
Day-Lewis F. D., Linde N., Haggerty R., Singha K., Briggs M. A.
ISSN
0094-8276
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
44
Pages
4908-4916
Langue
anglais
Résumé
Dual-domain models are used to explain anomalous solute transport behavior observed in diverse hydrologic settings and applications, from groundwater remediation to hyporheic exchange. To constrain such models, new methods are needed with sensitivity to both immobile and mobile domains. Recent experiments indicate that dual-domain transport of ionic tracers has an observable geoelectrical signature, appearing as a nonlinear, hysteretic relation between paired bulk and fluid electrical conductivity. Here we present a mechanistic explanation for this geoelectrical signature and evaluate assumptions underlying a previously published petrophysical model for bulk conductivity in dual-domain media. Pore network modeling of fluid flow, solute transport, and electrical conduction (1) verifies the geoelectrical signature of dual-domain transport, (2) reveals limitations of the previously used petrophysical model, and (3) demonstrates that a new petrophysical model, based on differential effective media theory, closely approximates the simulated bulk/fluid conductivity relation. These findings underscore the potential of geophysically based calibration of dual-domain models.
Mots-clé
General Earth and Planetary Sciences, Geophysics
Web of science
Open Access
Oui
Création de la notice
20/10/2017 14:27
Dernière modification de la notice
20/08/2019 16:08
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