Metadata: Nanaimo Lowlands Aquifers Confinement Conditions

Metadata NAP : more info

Identification

Abstract

This dataset shows the confinement of the Nanaimo Lowland aquifer, British Columbia. The study area is from Nanoose Bay to Deep Bay, designating a low relief coastal strip along the southeastern part of Vancouver Island, BC. The confinement of the aquifer was determinate using the sediment thickness and type. The resulting map shows a large area of free and semi-confined conditions on the west of the Englishman River. There is also an area of confined conditions next to the Big Qualicum River.
Status:register completed
TitleNanaimo Lowlands Aquifers Confinement Conditions
Date2016-03-31 (register publication)
Date2016-03-07 (register revision)
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
Online Resource
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
NameFrancesca Audet-Gagnon
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
Telephone
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 mapDigital
Series

Goals

The confining conditions were created to provide a regional frame of the Quadra aquifer confinement within Nanaimo Lowland area.

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
Spatial representationregister grid
Resolution
Languageeng; CAN
Languagefra; CAN
Character encodingutf8
Thematic categorygeoscientificInformation
ExtentLocalisation
-124.790600000,49.196682000;-124.108868000,49.465623000
Supplemental information

Distribution

Specific information related to data distribution
Format
NameASCII Grid
Versionunknown
Format
NameWMS
Version1.3.0
Format
NameGIF
Versionunknown
Format
NameHTML
Version5
Format
NameJPG
Versionunknown
Format
NameTIFF
Versionunknown
Format
NameTXT
Versionunknown
Format
NamePNG
Versionunknown
Format
NameASCII GRID
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

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
Process step Sources
To define the Quadra Sand Aquifer confinement, four hydrogeological unit's thickness raster were used: Capilano-Salish, Capilano, Vashon Coarse and Vashon Till ones. These units were used since they overly the Quadra Sand Aquifer. For each raster, the cell values were converted to an integer by truncation, using ""Int"" tool. Two fields were then added to the attribute table: ""Confi"" and ""Confinement"". The first field ""Confi"" designates the aquifer conditions: 1 for free aquifer condition; 2 for semi-confined conditions and 3 for confined conditions. Each condition is described below: &bull; Free aquifer: gravel or/and sand; till with thickness < 3 m; &bull; Semi-confined aquifer: till with thickness > 3 m; clay or/and silt with thickness < 5 m; &bull; Confined aquifer: clay or/and silt with thickness &#8805; 5 m. In the second field, ""Confinement"", the ""Confi"" value was multiplied by a weight defined on aquifer conditions: 1 for free aquifer condition; 5 for semi-confined aquifer and 10 for confined conditions. The ""lookup"" tool was then used to create a new raster by looking up values found in the confinement field in the table of the input raster. The ""lookup"" field was the confinement. The resulting raster had two fields: count and value, which designates the confinement value. The value field was then reclassified (using the reclassify tool), thus the NoData pixels were assigned a new value of ""0"". This procedure was applied for the four hydrogeological units. These latter were then summed, using the tool ""Raster Calculator"". The resulting raster exhibits the summed confinement of the four hydrogeological units (field Value). A field ""Confinement"" is created and the values are classified as follow: - Confined: value &#8805; 30 - Semi-confined: value &#707; 10 et &#706; 30 - Unconfined: value &#8804; 10
Benoit, N. and Paradis, D., 2015. Three dimensional groundwater flow model of the Nanoose-Deep Bay area, Nanaimo Lowland, British Columbia; Geological Survey of Canada, Open File 7845, 1 zip file. doi: 10.4095/297046


Technical details and constraints

File identifierfd0b288e-8f2b-fb9f-58c2-09403d55dc65
Languageeng; CAN
Character encodingregister utf8
Hierarchical classificationregister dataset
Date2017-04-18
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:26910
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 author
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