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TitreA fully integrated groundwater-surface-water model for southern Ontario
TéléchargerTéléchargement (publication entière)
AuteurFrey, S K; Khader, O; Taylor, A; Erler, A R; Lapen, D R; Sudicky, E A; Berg, S J; Russell, H A J
SourceSouthern Ontario groundwater project 2014-2019: summary report; par Russell, H A J (éd.); Kjarsgaard, B A (éd.); Commission géologique du Canada, Dossier public 8536, 2020 p. 231-245, https://doi.org/10.4095/321108 (Accès ouvert)
Année2020
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/321108
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Russell, H A J; Kjarsgaard, B A; (2020). Southern Ontario groundwater project 2014-2019: summary report, Commission géologique du Canada, Dossier public 8536
Formatspdf
ProvinceOntario
SNRC30; 31C; 31D; 40; 41A; 41G; 41H
Lat/Long OENS -83.5000 -76.0000 45.3333 41.5000
Sujetseau souterraine; eaux de surface; lacs; rivières; bassins versants; réseaux hydrographiques; modèles; simulations par ordinateur; ressources en eau souterraine; régimes des eaux souterraines; écoulement de la nappe d'eau souterraine; aquifères; regimes d'écoulement; débits; niveaux des eaux souterraines; niveaux d'eau; fluctuations de niveaux des puits; utilisation de l'eau; unités hydrostratigraphiques; milieu hydrologique; propriétés hydrologiques; budget hydrologique; écoulement des cours d'eau; géochimie des eaux souterraines; géochimie du soufre; qualité de l'eau; géologie du substratum rocheux; sediments; sols; puits d'eau; puits d'observation; climatologie; climat; pollution; Bassin de Great Lakes ; réseau hydrométrique; station hydrométrique; changement climatique; extraction; surveillance; élaboration des politiques; recherche scientifique; hydrogéologie; géologie des dépôts meubles/géomorphologie; géologie régional; stratigraphie; géochimie; géologie de l'environnement; Nature et environnement; Sciences et technologie; Phanérozoïque; Cénozoïque; Quaternaire; Paléozoïque; Silurien; Ordovicien; Cambrien
Illustrationslocation maps; geoscientific sketch maps; schematic cross-sections; 3-D models; models; stratigraphic charts; tables; bar graphs; hydrographs; plots; time series
ProgrammeGéoscience des eaux souterraines, Caractéristiques d'aquifères et support cartographique
Diffusé2020 05 28
Résumé(disponible en anglais seulement)
A prototype groundwater- surface-water model for southern Ontario has been developed with HydroGeoSphere (HGS), which provides a three-dimensional (3-D), physics-based simulation of fully integrated groundwater-surface-water flow. To-date, the model has been tested for its ability to reproduce average monthly surface-water flow rates and groundwater levels, and its sensitivity to spatial and temporal resolution. Model utility has been demonstrated through an assessment of groundwater extraction influences on regional groundwater levels, which demonstrates how it could be used to address water resources and hydrologic questions. The model domain encompasses 109,565 km2, with approximately 79,000 km2 being land area and the remainder being area within the Great Lakes. To assess sensitivity to spatial resolution, low- and high- resolution model versions have been constructed, with surface water features resolved to Strahler order 4 and Strahler order 3, respectively. The hydrostratigraphy is based on 3-D Paleozoic and Quaternary geological models, along with mapping of depth to the base of high-sulphur content groundwater. The low- and high- resolution models consist of 21 and 16 layers, and 874,398 and 2,127,760 3-D finite element mesh nodes. Both models incorporate spatially distributed soil, landcover, and spatially and temporally distributed evapotranspiration. To assess model performance, 321 wells from the Provincial Groundwater Water Monitoring Network and 29 hydrometric stations from the Water Survey of Canada were incorporated as validation targets. Simulation results show that both the low- and high- resolution versions of the model were able to capture the magnitude and seasonal variation in both groundwater levels and surface water flow rates. As the model was subjected to minimal calibration, this is a meaningful validation of its performance. Differences in performance between the low- and high- resolution model versions were minimal for both the surface-water flow rates and groundwater level results. Results demonstrate the utility of a regional scale, fully integrated hydrologic model for investigating water resources issues of southern Ontario. The model could evolve into a multi-objective groundwater/surface-water simulation tool for southern Ontario, wherein seasonal water balances and general trends in groundwater and surface water availability under climate change and anthropogenic influences within the Great Lakes Region can be assessed.
GEOSCAN ID321108