Single-hole GPR reflection imaging of solute transport in a granitic aquifer

Détails

ID Serval
serval:BIB_A5F0F2E62D39
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Single-hole GPR reflection imaging of solute transport in a granitic aquifer
Périodique
GEOPHYSICAL RESEARCH LETTERS
Auteur⸱e⸱s
Dorn C., Linde N., Le Borgne T., Bour O., Baron L.
ISSN-L
0094-8276
Statut éditorial
Publié
Date de publication
04/2011
Volume
38
Pages
L08401
Langue
anglais
Résumé
Identifying transport pathways in fractured rock is extremely
challenging as flow is often organized in a few fractures that occupy a
very small portion of the rock volume. We demonstrate that saline tracer
experiments combined with single-hole ground penetrating radar (GPR)
reflection imaging can be used to monitor saline tracer movement within
mm-aperture fractures. A dipole tracer test was performed in a granitic
aquifer by injecting a saline solution in a known fracture, while
repeatedly acquiring single-hole GPR sections in the pumping borehole
located 6 m away. The final depth-migrated difference sections make it
possible to identify consistent temporal changes over a 30 m depth
interval at locations corresponding to fractures previously imaged in
GPR sections acquired under natural flow and tracer-free conditions. The
experiment allows determining the dominant flow paths of the injected
tracer and the velocity (0.4-0.7 m/min) of the tracer front. Citation:
Dorn, C., N. Linde, T. Le Borgne, O. Bour, and L. Baron (2011),
Single-hole GPR reflection imaging of solute transport in a granitic
aquifer, Geophys. Res. Lett., 38, L08401, doi: 10.1029/2011GL047152.
Web of science
Création de la notice
30/03/2012 13:19
Dernière modification de la notice
20/08/2019 16:11
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