Lévesque Yan, Walter Julien et Chesnaux Romain. (2021). Transient Electromagnetic (TEM) Surveys as a First Approach for Characterizing a Regional Aquifer: The Case of the Saint-Narcisse Moraine, Quebec, Canada. Geosciences, 11, (10), p. 415.
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URL officielle: http://dx.doi.org/doi:10.3390/geosciences11100415
Résumé
Geological contexts that lack minimal stratigraphic and piezometric information can be challenging to produce an initial hydrogeological map in remote territories. This study proposes an approach to characterize a regional aquifer using transient electromagnetic (TEM) surveys. Given the presence of randomly dispersed boreholes, the Saint-Narcisse moraine in the Mauricie region of Quebec (Canada) is an appropriate site for collecting the required geophysical data, correlating the stratigraphic and piezometric information, and characterizing regional granular aquifers in terms of stratigraphy, geometry, thickness, and extent. In order to use all TEM results (i.e., 47 stations) acquired in the moraine area, we also correlated 13 TEM stations, 7 boreholes, and 6 stratigraphic cross-sections to derive an empirical and local petrophysical relationship and to establish a calibration chart of the sediments. Our TEM data, combined with piezometric mapping and the sedimentary records from boreholes and stratigraphic cross-sections, revealed the compartmentalization of a multi-kilometer morainic system and indicated the presence of two large unconfined granular aquifers overlying the bedrock. These aquifers extend more than 12 km east to west across the study area and are between 25 and >94 m thick. The TEM method provides critical information on groundwater at a regional scale by acquiring information from multiple stations within a short time span to a degree not possible with other existing methodologies.
Type de document: | Article publié dans une revue avec comité d'évaluation |
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ISSN: | 2076-3263 |
Volume: | 11 |
Numéro: | 10 |
Pages: | p. 415 |
Version évaluée par les pairs: | Oui |
Date: | 2021 |
Identifiant unique: | 10.3390/geosciences11100415 |
Sujets: | Sciences naturelles et génie > Génie Sciences naturelles et génie > Sciences appliquées Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie) |
Département, module, service et unité de recherche: | Départements et modules > Département des sciences appliquées > Unité d'enseignement en sciences de la Terre Unités de recherche > Centre d’étude sur les Ressources minérales (CERM) |
Mots-clés: | transient electromagnetic surveys (TEM), Saint-Narcisse moraine, stratigraphy, sediments, aquifer, regional piezometry, groundwater potential, levés électromagnétiques transitoires (TEM), moraine de Saint-Narcisse, stratigraphie, sédiments, aquifère, piézométrie régionale, potentiel hydrique |
Déposé le: | 26 avr. 2022 23:26 |
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Dernière modification: | 26 avr. 2022 23:26 |
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