| Titre | Using 222-radon surveys and regional scale groundwater models to evaluate groundwater discharge to Lake Simcoe |
| Télécharger | Téléchargement (publication entière) |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Robinson, C; Wallace, H; Wexler, E J; Malott, S |
| Source | Regional-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 |
| Année | 2019 |
| Séries alt. | Ontario Geological Survey, Open File Report 6349 |
| Éditeur | Ressources naturelles Canada |
| Éditeur | Gouvernement de l'Ontario |
| Réunion | Regional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; février 27-28, 2019 |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/313597 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House |
| Formats | pdf |
| Province | Ontario |
| SNRC | 31D/03; 31D/04; 31D/05; 31D/06; 31D/11; 31D/12 |
| Région | Lake Simcoe |
| Lat/Long OENS | -80.0000 -79.0000 44.7500 44.0000 |
| Sujets | eau 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 |
| Diffusé | 2019 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. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Volume des résumés pour la Commission géologique de l'Ontario et la commission geologique du Canada géoscience des eaux souterraines de la CGC
portes ouvertes avec conservation Ontario. |
| GEOSCAN ID | 313597 |
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