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TitreUsing 222-radon surveys and regional scale groundwater models to evaluate groundwater discharge to Lake Simcoe
TéléchargerTéléchargement (publication entière)
AuteurRobinson, C; Wallace, H; Wexler, E J; Malott, S
SourceRegional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House; par Russell, H A J; Ford, D; Holysh, S; Priebe, E H; Commission géologique du Canada, Dossier public 8528, 2019 p. 23, https://doi.org/10.4095/313597 (Accès ouvert)
Année2019
Séries alt.Ontario Geological Survey, Open File Report 6349
ÉditeurRessources naturelles Canada
ÉditeurGouvernement de l'Ontario
RéunionRegional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; février 27-28, 2019
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/313597
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Russell, H A J; Ford, D; Holysh, S; Priebe, E H; (2019). Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House, Commission géologique du Canada, Dossier public 8528
Formatspdf
ProvinceOntario
SNRC31D/03; 31D/04; 31D/05; 31D/06; 31D/11; 31D/12
Lat/Long OENS -80.0000 -79.0000 44.7500 44.0000
Sujetseau souterraine; aquifères; ressources en eau souterraine; régimes des eaux souterraines; résurgence des eaux souterraines; taux de décharge; etudes isotopiques; isotopes; radon; eaux de surface; lacs; littoraux; qualité de l'eau; substances polluantes; modèles; perméabilité; sediments; dépôts glaciaires; moraines; utilisation du terrain; planification; hydrogéologie; géologie des dépôts meubles/géomorphologie; géologie de l'environnement; Phanérozoïque; Cénozoïque; Quaternaire
Diffusé2019 02 08
Résumé(disponible en anglais seulement)
Groundwater discharge can be an important pathway for delivering pollutants to large lakes, but this pathway is often overlooked. To understand the potential impact of groundwater inputs on lake water quality, the volume of groundwater discharge, the spatial distribution of this discharge, and the history of the discharging groundwater must be quantified. This study uses offshore 222-radon surveys together with regional scale numerical groundwater models to evaluate groundwater discharge to Lake Simcoe. In-lake 222-radon concentration data was first used to identify groundwater discharge hotspots along the shoreline and quantify groundwater discharge rates. The 222-radon results, which compared well with the regional scale numerical model results, were then used to provide insights into hydrogeological factors controlling groundwater discharge to Lake Simcoe. Key factors included the permeability of nearshore sediments, proximity of the shoreline to moraine recharge areas, absence of streams along the shoreline, and presence of tunnel channel aquifers. Finally, the numerical model along the north shoreline of Lake Simcoe was applied to characterize groundwater discharge pathways, evaluate the land use in the recharge areas, and assess potential impacts of the groundwater inputs on lake water quality trends. The study presents a robust approach for regional scale evaluation of groundwater discharge to large lakes.
GEOSCAN ID313597