Metadata: 3D hydrostatigraphic model of the Châteauguay River watershed

Metadata NAP : more info

Identification

Abstract

A study of the Quaternary geology of the Canadian portion of the Châteauguay River watershed was undertaken as part of a joint groundwater study program conducted by the Geological Survey of Canada, INRS- ETE (Institut national de la recherché scientifique - Centre eau terre Environnement) and the Ministry of the Environment of Quebec. A grid-based technique has been designed to construct a 3D stratigraphic model of the Quaternary sediments overlying a fractured aquifer. This study applies a 3D-mapping method based on unit thickness calculation and relies on the use of a grid-calculating application in standard GIS software. It allows for simple and rapid computation of the respective thicknesses of the geologic strata based on surficial geology maps and borehole logs. The following sedimentary units were considered in the development of the 3D model, from top to bottom: organic, alluvial, lacustrine, eolian, coarse marine, fine marine, sandy gravelly glaciofluvial, sandy silty glaciofluvial and glacial (silty-clayey till).

Status:

completed

Title

3D hydrostatigraphic model of the Châteauguay River watershed

Date

2008-01-01 ( register

publication)

Date

2008-01-01 ( register

creation)

Edition

Edition date

Citation group

principalInvestigator

Name

Miroslav Nastev

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery 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 miroslav.nastev@canada.ca
Telephone	voice; 1 (418) 6542682
Online Resource

Citation group

originator

Name

Tommy Tremblay

Organisation

Université du Québec à Montréal

Position

Information

Address
Telephone
Online Resource

Citation group

custodian

Name

Francois Letourneau

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery 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
Telephone	voice; 1 (418) 6543826
Online Resource

Citation group

pointOfContact

Name

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Position

Information

Address	Delivery point : City : Administrative region : Postal code : Country : Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource

Presentation form

modelDigital

Related publication

Tremblay, T. (2008) Hydrostratigraphie et géologie du Quaternaire dans le bassin-versant de la Rivière Chaudière, Québec. M.Sc. Earth Sciences, Université du Québec à Montréal, Montréal, Canada. 224 p. Tremblay, T., M. Nastev and M. Lamothe (2010). Grid-based Hydrostratigraphic 3D Modelling of the Quaternary Sequence in the Chateauguay River Watershed, Quebec. Canadian Water Resources Journal / Revue canadienne des ressources hydriques. 35(4), 377-398.

Goals

Define the architecture of the geological formations and main units of the aquifer system, and build a 3D model of the quaternary sediments.

Keyword(s)

Thesaurus

Title

NRCan - GSC - Hydrogeology - Thesaurus

Date

2009-01-01 ( register

creation)

Date

2016-12-01 ( register

publication)

Edition

Edition date

Citation group

custodian
Name
Organisation	Government of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information

Type

place

Term

Châteauguay River

Thesaurus
Type
Term	Groundwater

Thesaurus
Type
Term	Watershed

Thesaurus
Type
Term	Aquifer

Thesaurus

Title

NRCan - GSC - Hydrogeology - Thesaurus

Date

2009-01-01 ( register

creation)

Date

2016-12-01 ( register

publication)

Edition

Edition date

Citation group

custodian
Name
Organisation	Government of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information

Type

theme

Term

Quaternary

Thesaurus

Title

NRCan - GSC - Hydrogeology - Thesaurus

Date

2009-01-01 ( register

creation)

Date

2016-12-01 ( register

publication)

Edition

Edition date

Citation group

custodian
Name
Organisation	Government of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information

Type

product

Term

3D Model

Spatial representation	grid
Resolution
Language	fra; CAN
Character encoding	utf8
Thematic category	geoscientificInformation
Extent	-74.500000000,44.980000000;-73.500000000,45.420000000
Supplemental information

Distribution

Specific information related to data distribution

Format
Name	MapInfo Grid
Version	not applicable

Distributor

Contact

distributor

Name

Eric Boisvert

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery 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
Telephone	voice; 1 (418) 6543705
Online Resource

Distributor

Contact

pointOfContact

Name

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Position

Information

Address	Delivery point : City : Administrative region : Postal code : Country : Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource

Transfer options

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
3D model creation Stratigraphy definition

Process step

Sources

3D modeling is based on the integration of the surficial geology map and well data, using Mapinfo GIS software and Vertical Mapper grid computing software. The methodology applied is based on the calculation of the thickness of the units rather than on the elevation of the stratigraphic contacts. A regular grid was produced over the study area with cells of 30 x 30 m. The spatial distribution of the units fully respects the surficial deposits map contacts. Where the stratigraphic data were missing, the well database was improved by the addition of control points that mimic the anticipated variation in stratigraphic layers.

Well data from multiple data sources. "Ground penetrating radar" (GPR) surveys. Seismic surveys. Data from a portable percussion drilling device. Surficial geology map. Digital elevation model (DEM).

The quaternary stratigraphy has been simplified in the context of 3D modeling. The units, from the bottom to the top are: R: Cambro-Ordovician sedimentary rocks of the St. Lawrence Lowlands. T: Diamicton with sandy silty-clayey matrix continuous over most of the study area. The reworking by waves and currents can be locally important. This unit combines an ancient till at the base of the sequence (Till A), a glaciolacustrine unit (Middle-till complex) and the regional till (Till B). Gx: Ice-contact glaciofluvial sediments. Sand and gravel, blocks and diamicton. Up to 40 m thick. Gs: Subaqueous outwash fan Glaciofluvial sediments. Silt, sandy silt, sand, gravelly sand and diamicton. Up to 20m thick. These sediments are dominated by well-sorted sands and frequently contain silty rhythmites. Ma: Fine offshore marine sediments. Silt, sandy silt, clayey silt settled by decantation during the glaciomarine phase. Thickness from 0.5m to more than 5m. Mb: Littoral and nearshore marine sediments. Sand, sandy silt, gravelly sand and stratified gravel. Thickness of 0.5 to 5 m approximately. La: Fine offshore lacustrine sediments. Silt, sandy silt, clayey silt. Thickness of 0.5m to 3m, mainly near till mounds. Lb: Littoral and nearshore lacustrine sediments. Sand, sandy silt, gravelly sand and gravel. Thickness of 0.5 to 5 m approximately. These sediments often overly till and eskers. A: Present alluvial sediments (Ap) and terraced alluvial sediments (At). Silt, sand, sandy silt, gravelly sand and gravel frequently containing organic matter. Sediments deposited along the present-day rivers and during their incision in the quaternary formations. O: Organic deposits. Peat. Thickness ranging from 0.2 to 6 m. X: Embankment.

Well data from multiple data sources. Outcrops and surface observations. Surficial geology map.

Technical details and constraints

File identifier	2b6ca6d5-60dd-9699-ab85-8f7c2fb8ac9f
Language	eng; CAN
Character encoding	utf8
Hierarchical classification	dataset
Date	2018-05-31
Metadata standard	North American Profile of ISO 19115:2003 - Geographic information - Metadata
Version	CAN/CGSB-171.100-2009
Constraints
Update frequency	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
French	Canada	utf8

Geographic Reference System

Reference System code	EPSG:26918
Register	http://www.epsg-registry.org/
Version	6.14

Metadata Contact

pointOfContact

Name

Francois Letourneau

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery 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
Telephone	voice; 1 (418) 6543826
Online Resource

pointOfContact

Name

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Position

Information

Address	Delivery point : City : Administrative region : Postal code : Country : Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource