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GroMoPo Metadata for Chaudire-Appalaches regional model


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Created: Feb 06, 2023 at 8:53 p.m.
Last updated: Feb 06, 2023 at 8:54 p.m.
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Abstract

As part of the Quebec PACES III provincial groundwater resources assessment programme (Programme d'acquisition des connaissances en eaux souterraines), a regional-scale two-dimensional numerical groundwater model was developed in the Chaudiere-Appalaches region, Quebec, Canada. The model considers groundwater flow, transport of groundwater age and the influence of a fault on the flow system and its implications for groundwater quality. By including deep and shallow flow systems, the study helps fill a knowledge gap with respect to intermediate flow systems and the role they would play during potential energy resource development including shale gas exploitation from the Utica Shale. Physical and chemical hydrogeological data, including an analysis of C-14 in dissolved inorganic carbon in sampled groundwater, supported a regional conceptual flow model forming the basis for numerical simulations. The numerical model is first calibrated to regional piezometry through a semi-automated workflow using the inverse model PEST. Although some evidence for deeper regional flow exists, the area appears to be dominated by local flow systems on maximum length scales of about 5 km, with significant flow through the top 40 to 60 m of the fractured sedimentary rock aquifer. This regional-scale flow model is also supported by the local hydrogeochemical signatures. Simulated mean groundwater ages show young shallow water of <100 years with rapid increases in age with depth suggesting diffusion-controlled age evolution. Groundwater age is likely being perturbed in the vicinity of the Jacques Cartier River fault, which can act as both a barrier and a preferential pathway, provided permeability contrasts with the surrounding rock are at least two orders of magnitude.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Canada
North Latitude
46.6000°
East Longitude
-71.2000°
South Latitude
46.1000°
West Longitude
-71.8000°

Content

Additional Metadata

Name Value
DOI 10.1080/07011784.2018.1437370
Depth 9100
Scale < 100 000 km²
Layers 6-10 layers
Purpose groundwater resources;groundwater contamination
GroMoPo_ID 18
IsVerified True
Model Code FLONET/TR2 code
Model Link https://doi.org/10.1080/07011784.2018.1437370
Model Time SS
Model Year 2018
Model Authors D. Janosa , J. Molsona , R. Lefebvreb
Model Country Canada
Data Available report/paper only;output publicly available
Developer Email john.molson@ggl.ulaval.ca
Dominant Geology Model focuses on multiple geologic materials
Developer Country Canada
Publication Title Regional groundwater flow dynamics and residence times in Chaudiere-Appalaches, Quebec, Canada: Insights from numerical simulations
Original Developer No
Additional Information The model considers groundwater flow, transport of groundwater age and the influence of a fault on the flow system and its implications for groundwater quality.
Integration or Coupling Solute transport
Evaluation or Calibration dynamic water levels;Hydraulic conductivities
Geologic Data Availability

How to Cite

GroMoPo, C. Mohan (2023). GroMoPo Metadata for Chaudire-Appalaches regional model, HydroShare, http://www.hydroshare.org/resource/d51c3f94319f4a1398ef4392230e14d4

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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