Metadata: 3D hydrostatigraphic model of the Chaudiere River watershed

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Identification

Abstract

The Chaudière River (Quebec) watershed Quaternary sediments 3D geological modeling is the result of the compilation of the data used to produce the synthesis surficial geological and geomorphological maps of the Estrie-Beauce region. The implemented methodology is based on recent Quaternary mapping projects directly applied to hydrogeology (Portneuf, AFSOQ, Châteauguay). Data is first compiled into a database and then integrated into Gocad® 3D modeling software. The model was designed to be used in the estimation of the hydrological balance, including groundwater recharge and for hydrogeological modeling (3D flow). In order to do this, the units of the surficial geological map and the other subsurface Quaternary units have been grouped into nine hydrostratigraphic units with similar lithological and hydrostratigraphic (lithostratigraphic) properties. The different units of the model are (from the most recent to the oldest): 1) organic sediments; 2) alluvial, glaciolacustrine and glaciomarine sediments (sandy gravelly); 3) Glaciomarine and glaciolacustrine sediments (silty clayey); 4) Glaciofluvial sediments; 5) Reworked glacial sediments; 6) Thin glacial sediments; 7) Glacial sediments and old Quaternary sediments (silty clayey); 8) Old Quaternary sediments (sandy gravelly); and 9) Bedrock. The study area is defined with a regular grid of 250x250 meters cells. For each cell, the model describes all the sediments encountered from the surface to the bedrock, including their relative depth. When a unit is absent, a null thickness is assigned.
Status:register completed
Title3D hydrostatigraphic model of the Chaudiere River watershed
Date2014-01-01 (register publication)
Date2014-01-01 (register creation)
Edition
Edition date
Citation group
register pointOfContact
Name
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information
AddressDelivery point :
City :
Administrative region :
Postal code :
Country :
Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
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Citation group
register principalInvestigator
NameNicolas Benoît
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email nicolas.benoit@canada.ca
Telephonetelephone voice; 1 (418) 6543646
Online Resource
Citation group
register originator
NameNicolas Benoît
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email nicolas.benoit@canada.ca
Telephonetelephone voice; 1 (418) 6543646
Online Resource
Citation group
register custodian
NameFrancois Letourneau
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email francois.letourneau@canada.ca
Telephonetelephone voice; 1 (418) 6543826
Online Resource
Presentation formregister modelDigital
SeriesOpen File7515

Related publication

  • Caron, O., Lamothe, M., Benoit, N. et Nastev, M., 2014. Modélisation géologique 3D des sédiments quaternaires du bassin versant de la rivière Chaudière, Québec; Commission géologique du Canada, Dossier public 7515, 1 fichier .zip.

Goals

The aim of 3D geological modeling is to provide a georeferenced representation of the geometry of the geological units.

Keyword(s)

Thesaurus
TitleGovernment of Canada Core Subject Thesaurus
Date2004 (register creation)
Date2013-05-11 (register publication)
Edition
Edition date
Citation group
register custodian
Name
OrganisationGovernment of Canada; Library and Archives Canada
Position
Information
Typeregister
TermHydrogeology
Thesaurus
TitleNRCan - GSC - Hydrogeology - Thesaurus
Date2009-01-01 (register creation)
Edition
Edition date
Citation group
register pointOfContact
Name
OrganisationCommission Géologique du Canada - Geological Survey of Canada
Position
Information
Typeregister thème
TermGroundwater
Thesaurus
TitleNRCan - GSC - Hydrogeology - Thesaurus
Date2009-01-01 (register creation)
Edition
Edition date
Citation group
register pointOfContact
Name
OrganisationCommission Géologique du Canada - Geological Survey of Canada
Position
Information
Typeregister produit
Term3D Model
Thesaurus
TitleNRCan - GSC - Hydrogeology - Thesaurus
Date2009-01-01 (register creation)
Edition
Edition date
Citation group
register pointOfContact
Name
OrganisationCommission Géologique du Canada - Geological Survey of Canada
Position
Information
Typeregister thème
TermWatershed
Thesaurus
TitleNRCan - GSC - Hydrogeology - Thesaurus
Date2009-01-01 (register creation)
Edition
Edition date
Citation group
register pointOfContact
Name
OrganisationCommission Géologique du Canada - Geological Survey of Canada
Position
Information
Typeregister thème
TermQuaternary
Thesaurus
TitleNRCan - GSC - Hydrogeology - Thesaurus
Date2009-01-01 (register creation)
Edition
Edition date
Citation group
register pointOfContact
Name
OrganisationCommission Géologique du Canada - Geological Survey of Canada
Position
Information
Typeregister thème
TermChaudière River
Spatial representationregister textTable
Languagefra; CAN
Character encodingutf8
Thematic categorygeoscientificInformation
ExtentLocalisation
-71.583000000,45.167000000;-70.167000000,46.833000000
Supplemental information

Distribution

Specific information related to data distribution
Format
NameCSV
Versionnot applicable

Distributor

Contact
register pointOfContact
Name
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information
AddressDelivery point :
City :
Administrative region :
Postal code :
Country :
Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource

Distributor

Contact
register distributor
NameEric Boisvert
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email eric.boisvert2@canada.ca
Telephonetelephone voice; 1 (418) 6543705
Online Resource

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Quality


Quality description scope :register dataset

Lineage

Message Date lineage
Lineage is the description of the sources and steps used to create the current dataset.


Introduction
Process step Sources
The modeling approach used in this project was to use point data and 1D information (boreholes) to develop a 2D understanding, via a conceptual model and geological cross-sections, and then to interpolate the 2D cross-sections to create a 3D model. 3D modeling was carried out using the Gocad® software. The sediment isopach map represents the distribution of the total thickness of the superficial formations covering the bedrock. It was created using the superficial formations map and the various primary input data covering the study area. The first step in its realization consisted of extracting bedrock outcrops and thin till (≤ 1m) regions from geological maps. Elsewhere, bedrock depth was calculated using only wells that reached the bedrock. The maximum thickness of the thin till zones after interpolation has been simplified to 1 meter. The calculation of the thickness of each geological unit was carried out using Gocad® Discrete Smooth Interpolator (DSI) method. The different lithostratigraphic unit thickness maps have also been quantified with this interpolator. The proportion of SIH data was high, but the coverage of stratigraphic wells, geotechnical data, hydrogeological data and academic data resulted in a very realistic model of the geology of this area. A series of 16 stratigraphic cross-sections were integrated into the model to improve the geological realism of some valleys. The estimation of the thickness of the deposits is constrained by the proximity of the rock. The thickness of the material varies regularly from a zero thickness near the elevated areas with bedrock outcrops to a maximum thickness in the center of the valleys. The watershed has been discretized into a three-dimensional mesh, each cell having a resolution of 250 m x 250 m. This mesh is standard for data integration and despite the uncertainty of this type of spatial analysis; it appears sufficiently precise for regional hydrogeological models.
Primary input data used in the 3D modelling process: Outcrops; Academic studies (cross-sections); Well data (MTQ, MQQEFP (SIH), GSC, UQAM, private companies); Digital elevation model (DEM); Surficial geological map.
In order to have fewer components in the 3D model and to simplify the modelling process, units with similar lithologic and hydrostratigraphic properties were group in single units. 9 final units resulting from this simplification are: 1) Organic sediments (O) -Bog sediments (O) 2) Alluvial, glaciolacustrine and glaciomarine sediments - sandy gravelly (Ap, At, Ax, MGb, LGb, LGd) -Alluvial sediments (includes Ap, At, Ax) -Littoral and nearshore glaciomarine sands and gravels (MGb) -Littoral and nearshore glaciolacustrine sediments (LGb, LGd) 3) Glaciomarine and glaciolacustrine sediments - silty clayey (MGa, LGa) -Glaciomarine and marine clays and silts (MGa) -Offshore glaciolacustrine sediments (LGa) 4) Glaciofluvial sediments (Gx, Gs, GxT) -Glaciofluvial sediments (gravels and coarse sands; Gx, Gs, GxT ) 5) Reworked glacial sediments (Tr, Trm) -Reworked till (Tr, Trm) 6) Thin glacial sediments (Tm) -Thin and discontinuous till layer, veneer (Tm) 7) Glacial sediments and old Quaternary sediments - silty clayey (Tc, Q) -Continuous till layer, blanket (Tc) -Old Quaternary formations (mainly fine glaciolacustrine sediments; varves or rhythmites; Q) 8) Old Quaternary sediments - sandy gravelly (Q/Gx, Q/LGd) -Sandy old Quaternary formations (delta and buried glaciofluvial facies; Q/ LGd, Q/Gx) 9) Bedrock (R)
Primary input data used in the 3D modelling process: Outcrops; Academic studies (cross-sections); Well data (MTQ, MQQEFP (SIH), GSC, UQAM, private companies).


Technical details and constraints

File identifier37aa05ff-8880-8c26-0825-c7460d2b896b
Languageeng; CAN
Character encodingregister utf8
Hierarchical classificationregister dataset
Date2017-03-24
Metadata standardNorth American Profile of ISO 19115:2003 - Geographic information - Metadata
VersionCAN/CGSB-171.100-2009
Constraints
Update frequencyregister asNeeded

Regionalisation

Metadata are available in those languages (You can use language menu item in the top menu bar to switch language):
Language code Pays Encodage
register Frenchregister Canadaregister utf8

Geographic Reference System

Reference System codeEPSG:26919
Registerhttp://www.epsg-registry.org/
Version6.14

Metadata Contact

register pointOfContact
Name
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information
AddressDelivery point :
City :
Administrative region :
Postal code :
Country :
Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource
register pointOfContact
NameFrancois Letourneau
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email francois.letourneau@canada.ca
Telephonetelephone voice; 1 (418) 6543826
Online Resource