The role of hydrogeological setting in two Canadian peatlands investigated through 2D steady-state groundwater flow modelling

Quillet, Anne; Larocque, Marie; Pellerin, Stéphanie; Cloutier, Vincent; Ferlatte, Miryane; Paniconi, Claudio et Bourgault, Marc-André (2017). « The role of hydrogeological setting in two Canadian peatlands investigated through 2D steady-state groundwater flow modelling ». Hydrological Sciences Journal, 62(15), pp. 2541-2557.

Fichier(s) associé(s) à ce document :

Prévisualisation	PDF Télécharger (1MB)

Résumé

This study investigated how hydrogeological setting influences aquifer–peatland connections in slope and basin peatlands. Steady-state groundwater flow was simulated using Modflow on 2D transects for an esker slope peatland and for a basin peatland in southern Quebec (Canada). Simulations investigated how hydraulic heads and groundwater flow exported toward runoff from the peatland can be influenced by recharge, hydraulic properties, and heterogeneity. The slope peatland model was strongly dominated by horizontal flow from the esker. This suggests that slope peatlands are dependent on the hydrogeological conditions of the adjacent aquifer reservoir, but are resilient to hydrological changes. The basin peatland produced groundwater outflow to the surface aquifer. Lateral and vertical peat heterogeneity due to peat decomposition or compaction were identified as having a significant influence on fluxes. These results suggest that basin peatlands are more dependent on recharge conditions, and could be more susceptible to land use and climate changes.

Type:	Article de revue scientifique
Informations complémentaires:	This is an Accepted Manuscript of an article published by Taylor & Francis in Hydrological Sciences Journal on 30/10/2017, available online: http://www.tandfonline.com/10.1080/02626667.2017.1391387.
Mots-clés ou Sujets:	Peatland, aquifer, hydrogeological setting, 2D model, steady state, Modflow
Unité d'appartenance:	Centres institutionnels > Centre de recherche en géochimie et géodynamique (GEOTOP) Faculté des sciences > Département des sciences de la Terre et de l'atmosphère
Déposé par:	Marie Larocque
Date de dépôt:	31 août 2018 12:14
Dernière modification:	06 mars 2019 09:23
Adresse URL :	http://archipel.uqam.ca/id/eprint/11555

Modifier les métadonnées (propriétaire du document)

Statistiques