2008
DOI: 10.1029/2007jf000929
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Simulating the impact of glaciations on continental groundwater flow systems: 2. Model application to the Wisconsinian glaciation over the Canadian landscape

Abstract: [1] A 3-D groundwater flow and brine transport numerical model of the entire Canadian landscape up to a depth of 10 km is constructed in order to capture the impacts of the Wisconsinian glaciation on the continental groundwater flow system. The numerical development of the model is presented in the companion paper of Lemieux et al. (2008b). Although the scale of the model prevents the use of a detailed geological model, commonly occurring geological materials that exhibit relatively consistent hydrogeological … Show more

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Cited by 45 publications
(96 citation statements)
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References 40 publications
(64 reference statements)
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“…In the absence of information allowing transient simulation of the flow system on geological time scales, groundwater residence time indicators in the aquifer can be used to constrain the time scales relevant to the groundwater currently existing in the aquifer, and help to understand the evolution of the system (e.g., Morrissey et al, 2010). Combining such information with groundwater age simulations may prove a powerful new approach to explore the dynamics and evolution of regional groundwater flow systems over geological timescales (e.g., Lemieux et al, 2008;Gupta et al, 2015). Groundwater age (or residence time) is the average time elapsed since recharge of the range of water molecules present in a sample, integrating the effects of advection, hydrodynamic dispersion and mixing (Goode, 1996;Bethke and Johnson, 2002;Massoudieh et al, 2012).…”
Section: Regional Groundwater Flow In Sedimentary Basinsmentioning
confidence: 99%
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“…In the absence of information allowing transient simulation of the flow system on geological time scales, groundwater residence time indicators in the aquifer can be used to constrain the time scales relevant to the groundwater currently existing in the aquifer, and help to understand the evolution of the system (e.g., Morrissey et al, 2010). Combining such information with groundwater age simulations may prove a powerful new approach to explore the dynamics and evolution of regional groundwater flow systems over geological timescales (e.g., Lemieux et al, 2008;Gupta et al, 2015). Groundwater age (or residence time) is the average time elapsed since recharge of the range of water molecules present in a sample, integrating the effects of advection, hydrodynamic dispersion and mixing (Goode, 1996;Bethke and Johnson, 2002;Massoudieh et al, 2012).…”
Section: Regional Groundwater Flow In Sedimentary Basinsmentioning
confidence: 99%
“…Using topography solely may lead to misunderstanding of groundwater flow system dynamics and thus problematic conceptualizations. It is therefore necessary to integrate information with respect to all of the controlling factors-including heterogeneous aquifer properties (e.g., Freeze and Witherspoon, 1967), influence of geological structure, and changes in boundary conditions due to geological and geomorphological evolution (e.g., Lemieux et al, 2008)-to more realistically evaluate the groundwater flow regime.…”
Section: Regional Groundwater Flow In Sedimentary Basinsmentioning
confidence: 99%
“…Recent work has seen increased use of three-dimensional models [151,152], though compromises are still necessary at the largest scales. In their investigation of groundwater flow beneath the North American ice sheets, Lemieux et al [160,165] use a coarse classification of bedrock geology as one of four types (oceanic crust, orogenic belt, Canadian shield or sedimentary rocks) in order to implement their continentalscale model in HydroGeoSphere. Defining the subsurface hydrostratigraphy (thickness and properties of each hydrogeologic unit) is the only place that data figure prominently in most studies (cf.…”
Section: Early Models From Groundwater Hydrologymentioning
confidence: 99%
“…Unless the model domain extends to a hydraulic divide, some upstream boundary condition is required and often takes the form of a prescribed flux (Neumann condition). Most models assume temperate basal conditions, though the potential significance of permafrost, particularly near the ice-sheet margin and beyond, is acknowledged [157] and has been explored through prescribed model boundary conditions [152] as well as coupled modelling of ice-sheet-permafrost dynamics [159,160]). …”
Section: Early Models From Groundwater Hydrologymentioning
confidence: 99%
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