3D geologic framework models for regional hydrogeology and land-use management: a case study from a Quaternary basin of southwestern Quebec, Canada

Ross, Martin; Parent, Michel; Lefebvre, René

doi:10.1007/s10040-004-0365-x

Cited by 83 publications

(47 citation statements)

References 31 publications

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“…During surface generation, data are honoured as soft or hard constrained, depending on their quality (e.g. Ross et al, 2004). The roughnesses of the surfaces are polished with the discrete smoothing interpolation (DSI) algorithm (Mallet, 1992(Mallet, , 2002.…”

Section: Model Geometrymentioning

confidence: 99%

3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada)

Reiter

Heidbach

2014

Solid Earth

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Abstract. In the context of examining the potential usage of safe and sustainable geothermal energy in the Alberta Basin, whether in deep sediments or crystalline rock, the understanding of the in situ stress state is crucial. It is a key challenge to estimate the 3-D stress state at an arbitrarily chosen point in the crust, based on sparsely distributed in situ stress data.To address this challenge, we present a large-scale 3-D geomechanical-numerical model (700 km×1200 km×80 km) from a large portion of the Alberta Basin, to provide a 3-D continuous quantification of the contemporary stress orientations and stress magnitudes. To calibrate the model, we use a large database of in situ stress orientation (321 S Hmax ) as well as stress magnitude data (981 S V , 1720 S hmin and 2 (+11) S Hmax ) from the Alberta Basin. To find the best-fit model, we vary the material properties and primarily the displacement boundary conditions of the model. This study focusses in detail on the statistical calibration procedure, because of the large amount of available data, the diversity of data types, and the importance of the order of data tests.The best-fit model provides the total 3-D stress tensor for nearly the whole Alberta Basin, and allows estimation of stress orientation and stress magnitudes in advance of any well. First-order implications for the well design and configuration of enhanced geothermal systems are revealed. Systematic deviations of the modelled stress from the in situ data are found for stress orientations in the Peace River and the Bow Island Arch as well as for leak-off test magnitudes.

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Section: Model Geometrymentioning

confidence: 99%

3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada)

Reiter

Heidbach

2014

Solid Earth

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“…In recent years, new methodologies were developed to obtain stratigraphic 3D models with greater spatial detail. Moreover, these 3D solid models can be used as a geological basis for subsequent applications in groundwater flow models, serving as a platform for flow modeling (D'Agnese et al 1999;Ross et al 2005;Ahmed 2009;Wycisk et al 2009;Ducci et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Groundwater Mass Balance in Urbanized Areas Estimated by a Groundwater Flow Model Based on a 3D Hydrostratigraphical Model: the Case Study of the Eastern Plain of Naples (Italy)

Ducci

Sellerino

2015

Water Resour Manage

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Since 2001, a rising water table occurred in the eastern part of the city of Naples (Italy), leading to flooding of the foundations of many buildings and of the underground infrastructures (garages, subway tracks, etc.). This resulted from the reduction in the exploitation of water for industrial use and drinking water in the central part of the groundwater body of the eastern plain of Naples: the groundwater withdrawal decreased from up to 3 m3/s in 1990 to a few hundred litres per second in 1998. The variation of piezometric levels led to flooding of foundations of many buildings and of underground infrastructures, this is a big amount of water lost by the aquifer system and that should be evaluated. In order to assess aquifer hydraulic features and the groundwater quantitative status, a 3D hydrostratigraphic model reconstruction was developed to support groundwater flow modeling and the evaluation of the groundwater balance. \ud The 3D hydrostratigraphic model reconstructed the subsoil of the study area: layers of tuff and lenses of peat, which play an important hydrogeologic role as aquitard and aquiclude, are faithfully defined. Indeed, the model allows the depiction of the horizontal extension and of the thickness of each hydrofacies, even if strongly heteropic. \ud The groundwater flow model was defined using the 3D hydrostratigraphic model in the construction of the geometry and assignment of hydrodynamic parameters. The calibration and sensitivity analysis prove the goodness of the assigned hydraulic conductivity values. \ud \ud The model, together with a detailed computation of the paved areas with reduced infiltration, evaluated the recharge in 0.101 m3/s. The model calibration assessed an evaporation rate lower than the prefixed value, probably due to the absence of vegetation that restricts the phenomenon almost exclusively to evaporation. Moreover, the calibration of the model confirmed: - the assumed groundwater flow towards the sea in 0.313 m3/s; - the hypothesized amount of the subsurface inflow from upstream in 0.504 m3/s. A considerable amount of water lost by the aquifer system, about 0.315 m3/s, could be used by Municipality for different public uses

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“…Nastev et al (2004Nastev et al ( , 2005Nastev et al ( , 2006 investigated the hydraulic properties of the rock aquifer, developed a numerical groundwater flow model for this aquifer and determined the conditions required for its sustainable exploitation. Ross et al (2004Ross et al ( , 2005 developed a 3D geological model of the overlying Quaternary units and assessed the rock aquifer vulnerability on the basis of downward advective time.…”

Section: Introductionmentioning

confidence: 99%

Desalination of a sedimentary rock aquifer system invaded by Pleistocene Champlain Sea water and processes controlling groundwater geochemistry

et al. 2009

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The objective of this study was to identify geochemical processes and Quaternary geological events responsible for the variations in groundwater geochemistry observed in a sedimentary rock aquifer system, including brackish to saline groundwater. Inorganic constituents and environmental isotopes were analyzed for 146 groundwater samples. Dissolution of carbonates dominates in recharge areas, resulting in Ca-, Mg-HCO 3 groundwater. Further along flow paths, under confined conditions, Ca 2? -Na ? ion exchange causes groundwater evolution to Na-HCO 3 type. Na-Cl groundwater is also found and it falls on a seawater mixing line. Using conservative tracers, Cl -and Br -, the original Champlain Sea water is shown to have been, in the region, a mixture of about 34% seawater and 66% freshwater, a composition still retained by some groundwater. Na-Cl groundwater thus results from mixing with former Champlain Sea water and also from solute diffusion from overlying marine clay. The system is thus found to be at different stages of desalinization, from the original Champlain Sea water still present in hydraulically stagnant areas of the aquifer to fully flushed conditions in parts, where more flow occurs, especially in recharge zones. The geochemical processes are integrated within the hydrogeological context to produce a conceptual geochemical evolution model for groundwater of the aquifer system.

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3D geologic framework models for regional hydrogeology and land-use management: a case study from a Quaternary basin of southwestern Quebec, Canada

Cited by 83 publications

References 31 publications

3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada)

3-D geomechanical–numerical model of the contemporary crustal stress state in the Alberta Basin (Canada)

Groundwater Mass Balance in Urbanized Areas Estimated by a Groundwater Flow Model Based on a 3D Hydrostratigraphical Model: the Case Study of the Eastern Plain of Naples (Italy)

Desalination of a sedimentary rock aquifer system invaded by Pleistocene Champlain Sea water and processes controlling groundwater geochemistry

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