Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Klassen, J.
Publication Date: 2023
Title:
Distribution of Total Dissolved Solids in the Paskapoo Hydrostratigraphic Unit (gridded data, ASCII format)
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2023-0001
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: https://ags.aer.ca/document/DIG/DIG_2023_0001.zip
Description:
Abstract:

This grid represents the distribution of total dissolved solids (TDS) in the Paskapoo hydrostratigraphic unit (HSU). It is a result of a geostatistical model which was constructed using publicly available water chemistry data from the following sources:

1. The Alberta Government's Alberta Water Well Information Database (AWWID)

2. A previous Alberta Geological Survey water sampling project reported in AGS Special Report 81

The TDS surface was mapped at a regional scale using many years of data, thus providing a good indication of regional water chemistry within the unit rather than site-specific values.

Purpose: To provide the regional total dissolved solids surface for the Paskapoo HSU
Supplemental Information: Language: In English;
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1960
Ending Date: 2014
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -112
North Bounding Coordinate: 55
South Bounding Coordinate: 50
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: chemical
Theme Keyword: geology
Theme Keyword: groundwater
Theme Keyword: groundwater chemistry
Theme Keyword: hydrochemistry
Theme Keyword: hydrogeology
Theme Keyword: paskapoo formation
Theme Keyword: total dissolved solids
Place:
Place Keyword Thesaurus: none
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: alberta
Place Keyword: canada
Place Keyword: central alberta
Place Keyword: southern alberta
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: Klassen, J.
Originator: Lemay, T.G.
Publication Date: 2023
Title:
Distribution of Total Dissolved Solids in the Paskapoo Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2023-0002
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: Klassen, J.
Originator: Lemay, T.G.
Publication Date: 2023
Title: Distribution of Total Dissolved Solids in the Paskapoo Hydrostratigraphic Unit
Geospatial Data Presentation Form: map
Series Information:
Series Name: Map
Issue Identification: MAP 640
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: ISBN: 978-1-4601-5372-7 Scale 1:1 250 000
Online Linkage: https://ags.aer.ca
Data Quality Information:
Attribute Accuracy:
Attribute Accuracy Report:

The following statistics describe the accuracy of the geostatistical layer used to create the final grid.

Samples:

Mean error: -0.631 mg/L

Root mean square error: 333.0 mg/L

Mean standardized error: 0.006

Root mean square standardized: 0.96

Average standard error: 336.8

Logical Consistency Report:
Grid cell values represent total dissolved solids concentration in mg/L. Grid cell spacing is 500 metres by 500 metres. Grid cells with no data are assigned the value -9999.
Completeness Report:
The final TDS surface grid covers part of the extent of the Paskapoo HSU as modelled in the Geological Framework of Alberta, version 3. The final grid was clipped to the spatial extent of the data.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
A majority of the AWWID wells are located to the middle of the Alberta Township System quarter section (occasionally to the middle of the section). Therefore, there can be up to approximately 566 m (or up to approximately 1131 m if the well is located in the middle of a section) of error in the well location and subsequent maps derived from the well records. These sources of error are not unique to this study and are encountered in any hydrogeological study that uses the AWWID, unless further refinement of well locations is undertaken.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report:

The potential for up to approximately 566 m (sometimes approximately 1131 m) of horizontal accuracy error for water wells may also introduce errors in the surface elevation, which is derived from the provincial 25 m DEM, based on the location of the well. This error is likely on the order of plus/minus 5 m, but may be 10's of metres in areas where there are large changes in elevation. Any error in elevation may influence the allocation of the well as well as sampling location. These sources of error are not unique to this study and are encountered in any hydrogeological study that uses the AWWID, unless further refinement of well locations is undertaken.

The mid-point of the sampled interval is a calculated value and its accuracy is dependent on the accuracy of the measured depths and elevations provided in the well header. These values are somewhat inconsistent for the water wells because many of them are not surveyed.

Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Klassen, J.
Originator: Lemay, T.G.
Publication Date: 2023
Title:
Distribution of Total Dissolved Solids in the Paskapoo Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2023-0002
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: 1960
Ending Date: 2014
Source Currentness Reference: ground condition
Source Citation Abbreviation: DIG 2023-0002
Source Contribution: data for mapping total dissolved solids
Process Step:
Process Description:

Step 1 (Modelling the surface): Empirical Bayesian kriging was used in the ArcMap 10.8.1 Geostatistical Analyst extension to interpolate the total dissolved solids values and create a grid of the total dissolved solids surface of the Paskapoo HSU.

Method Report:

Output surface type: Prediction

Power: 1

Neighbourhood type: Standard

Maximum neighbours: 15

Minimum neighbours: 10

Sector type: 1 sector

Samples: 12 679

Cell size: 500 m

Step 2 (Grid Alterations): The final grid was clipped based on the extent of the Paskapoo HSU, and 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: 924
Column Count: 909
Spatial Reference Information:
Horizontal Coordinate System Definition:
Planar:
Map Projection:
Map Projection Name: NAD 1983 Transverse Mercator
Transverse Mercator:
Scale Factor at Central Meridian: 0.9992
Longitude of Central Meridian: -115.0
Latitude of Projection Origin: 0.0
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 TDS in the Paskapoo HSU, expressed as mg/L. 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: 20230131
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