Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Brinsky, J.
Publication Date: 2023
Title: Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit (gridded data, ASCII format)
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2022-0029
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: https://ags.aer.ca/document/DIG/DIG_2022_0029.zip
Description:
Abstract:
This grid represents the distribution of hydraulic head in the Leduc hydrostratigraphic unit (HSU). The distribution of hydraulic head is a result of a geostatistical model which was constructed using publicly available pressure data from drillstem tests (DSTs). The hydraulic head distribution was mapped at a regional scale using many years of data, thus providing a good indication of the regional potentiometric surface within the unit rather than site-specific values. The data are in Esri ASCII grid format.
Purpose: To provide the regional hydraulic head surface for the Leduc HSU.
Supplemental Information: Language: In English.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1951
Ending Date: 2001
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -110
North Bounding Coordinate: 57.5
South Bounding Coordinate: 49
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: data
Theme Keyword: groundwater
Theme Keyword: hydraulic head
Theme Keyword: hydrogeology
Theme Keyword: leduc formation
Theme Keyword: potentiometric surface
Theme Keyword: woodbend group
Place:
Place Keyword Thesaurus: none
Place Keyword: 72e
Place Keyword: 72l
Place Keyword: 72m
Place Keyword: 73d
Place Keyword: 73e
Place Keyword: 73l
Place Keyword: 73m
Place Keyword: 74d
Place Keyword: 74e
Place Keyword: 82g
Place Keyword: 82h
Place Keyword: 82i
Place Keyword: 82j
Place Keyword: 82n
Place Keyword: 82o
Place Keyword: 82p
Place Keyword: 83a
Place Keyword: 83b
Place Keyword: 83c
Place Keyword: 83d
Place Keyword: 83e
Place Keyword: 83f
Place Keyword: 83g
Place Keyword: 83h
Place Keyword: 83i
Place Keyword: 83j
Place Keyword: 83k
Place Keyword: 83l
Place Keyword: 83m
Place Keyword: 83n
Place Keyword: 83o
Place Keyword: 83p
Place Keyword: 84a
Place Keyword: 84b
Place Keyword: 84c
Place Keyword: 84d
Place Keyword: 84e
Place Keyword: 84f
Place Keyword: 84g
Place Keyword: 84h
Place Keyword: alberta
Place Keyword: canada
Access Constraints: Public
Use Constraints:
Acknowledgement of the Alberta Energy Regulator/Alberta Geological Survey as the originator/source of this information is required as described in the Open Government License - Alberta.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Brinsky, J.
Publication Date: 2022
Title:
Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2021-0028
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: https://ags.aer.ca
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Brinsky, J.
Publication Date: 2023
Title: Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit
Geospatial Data Presentation Form: map
Series Information:
Series Name: Map
Issue Identification: MAP 631
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: ISBN:978-1-4601-5363-5
Online Linkage: https://ags.aer.ca
Data Quality Information:
Attribute Accuracy:
Attribute Accuracy Report:

The hydraulic head in the Leduc HSU was first modelled separately in three regional areas of Leduc Formation carbonate platform and reef buildup complexes and then combined into one grid.

The following statistics describes the accuracy of the geostatistical layers used to create the final grid:

Region 1: Northwest Leduc (Peace River Arch platform and fringing reef complexes; Simonette, Sturgeon Lake, Gold Creek, Bigstone, Fir, Pine Creek, Obed, and Windfall reef complexes)

Samples: 134

Mean error: -0.14 m

Root-mean-square error: 31.3 m

Mean standardized error: 0.007

Root-mean-square standardized error: 0.98

Average standard error: 31.4 m

Region 2: Central Leduc (Rimbey-Meadowbrook reef trend; Cheddarville, Redwater, and Willingdon reef complexes)

Samples: 70

Mean error: -5.1 m

Root-mean-square error: 61.2 m

Mean standardized error: -0.035

Root-mean-square standardized error: 1.09

Average standard error: 37.1 m

Region 3: Southeast Leduc (Bashaw, Clive, Nevis, Stettler reef complexes; Killam barrier reef and southern Leduc shelf complex)

Samples: 276

Mean error: 0.2 m

Root-mean-square error: 38.7 m

Mean standardized error: 0.025

Root-mean-square- standardized: 0.97

Average standard error: 38.1 m

Logical Consistency Report: Grid cell spacing is 500 m by 500 m. Grid cells with no data are assigned the value -9999.
Completeness Report:
The final hydraulic head surface map covers the extent of the Leduc HSU as modelled in the 3D Provincial Geological Framework Model of Alberta, version 2. In addition, the final map was clipped to the spatial extent of the data.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
See AGS DIG 2021-0028 (data points) for details on the horizontal accuracy of the input hydraulic head point data, which is affected by the locational accuracy of the wells.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report:
See AGS DIG 2021-0028 (data points) for details on the vertical accuracy of the input hydraulic head point data, which is affected by the locational accuracy of the wells.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Brinsky, J.
Publication Date: 2022
Title:
Distribution of Hydraulic Head in the Leduc Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2021-0028
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Source Scale Denominator: 0
Type of Source Media: online
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1951
Ending Date: 2001
Source Currentness Reference: ground condition
Source Citation Abbreviation: DIG 2021-0028
Source Contribution: Published tabular data used to create this dataset
Process Step:
Process Description:

The hydraulic head grid was clipped to the data extent of both the hydraulic head and total dissolved solids data points.

The Leduc hydraulic head was modelled separately in three regions and then combined into one grid.

Selection criteria and the final data set used for interpolation of this grid are documented in the metadata for AGS DIG 2021-0028

Step 1 (Modelling the surface): An empirical Bayesian kriging algorithm was used in the ArcMap Geostatistical Analyst extension to interpolate the hydraulic values. This was done in three separate areas and then combined to create a final grid:

Northwest Leduc (Peace River Arch platform and fringing reef complexes; Simonette, Sturgeon Lake, Gold Creek, Bigstone, Fir, Pine Creek, Obed, and Windfall reef complexes)

Method Report:

Method: Empirical Bayesian kriging

Output type: Prediction

Transformation: None

Semivariogram model type: Power

Subset size: 100

Overlap factor: 1

Number of simulations: 100

Searching neighbourhood: Standard circular

Neighbours to include: 8

Include at least: 8

Sector type: 8

Radius: 20,279

Angle: 0

Central Leduc (Rimbey- Meadowbrook reef trend; Cheddarville, Redwater, and Willingdon reef complexes)

Method Report:

Method: Empirical Bayesian kriging

Output type: Prediction

Transformation type: None

Semivariogram model type: Power

Subset size: 100

Overlap factor: 1

Number of simulations: 100

Searching neighbourhood: standard circular

Neighbours to include: 8

Include at least: 8

Sector type: full

Radius: 32,840

Angle: 0

Southeast Leduc (Bashaw, Clive, Nevis, Stettler reef complexes; Killam barrier reef and southern Leduc shelf complex)

Method Report:

Method: Empirical Bayesian kriging

Output type: Prediction

Transformation type: None

Semivariogram model type: Power

Subset size: 100

Overlap factor: 1

Number of simulations: 100

Searching neighbourhood: standard circular

Neighbours to include: 8

Include at least: 8

Sector type: Four by 45 degree

Radius: 34,854

Angle: 0

Step 2 (Grid combinations): The three grids were combined using ArcMap's Add Rasters to Mosaic Dataset tool.

Step 3 (Grid Alterations): The final grid was clipped based on the extent of the Leduc HSU and the spatial distribution of data.

Process Date: 2021
Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Pixel
Row Count: 1852
Column Count: 1335
Spatial Reference Information:
Horizontal Coordinate System Definition:
Planar:
Map Projection:
Map Projection Name: NAD_1983_10TM_AEP_Forest
Transverse Mercator:
Scale Factor at Central Meridian: 0.9992
Longitude of Central Meridian: -115.0
False Easting: 500000.0
False Northing: 0.0
Planar Coordinate Information:
Planar Coordinate Encoding Method: coordinate pair
Coordinate Representation:
Abscissa Resolution: 0.000000002219135986081256
Ordinate Resolution: 0.000000002219135986081256
Planar Distance Units: metre
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System of 1980
Semi-Major Axis: 6378137.0
Denominator of Flattening Ratio: 298.257222101
Entity and Attribute Information:
Overview Description:
Entity and Attribute Overview:
Grid cell values represent the hydraulic head in the Leduc HSU, expressed as elevations in metres above mean sea level, Canadian Geodetic Vertical Datum of 1928. Values are floating point data type.
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Distribution Liability:
The Alberta Energy Regulator / Alberta Geological Survey (AER/AGS) licenses this information under the Open Government License - Alberta. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the AER/AGS of any manufacturer's product.
Metadata Reference Information:
Metadata Date: 20221208
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Access Constraints: none
Metadata Use Constraints: none