Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Nakevska, N.
Publication Date: 2019
Title:
Distribution of Total Dissolved Solids in the Wapiti / Belly River Hydrostratigraphic Unit (gridded data, ASCII format)
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2017-0025
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: http://ags.aer.ca/document/DIG/DIG_2017_0025.zip
Description:
Abstract:
This grid represents the distribution of total dissolved solids (TDS) in the Wapiti / Belly River hydrostratigraphic unit (HSU). It is a result of a geostatistical model which was constructed using publicly-available data from Alberta Environment and Parks' (AEP) Alberta Water Well Information Database (AWWID) and formation water chemistry data from drillstem test and production fluids from oil and gas wells (see AGS dataset DIG 2017-0026). 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 Wapiti / Belly River HSU.
Supplemental Information: Language: In English;
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1961
Ending Date: 2013
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120.115866
East Bounding Coordinate: -109.185047
North Bounding Coordinate: 55.72889
South Bounding Coordinate: 48.901926
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: belly river group
Theme Keyword: geology
Theme Keyword: hydrogeochemical
Theme Keyword: hydrogeological
Theme Keyword: wapiti
Theme Keyword: water chemistry
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: 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: 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: Nakevska, N.
Originator: Singh, A.
Publication Date: 2019
Title: Distribution of Total Dissolved Solids in the Wapiti / Belly River Hydrostratigraphic Unit
Geospatial Data Presentation Form: map
Series Information:
Series Name: Map
Issue Identification: MAP 542
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: ISBN: 978-1-4601-2220-4
Online Linkage: http://www.ags.aer.ca
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Nakevska, N.
Publication Date: 2019
Title:
Distribution of Total Dissolved Solids in the Wapiti / Belly River Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2017-0026
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: http://www.ags.aer.ca
Data Quality Information:
Attribute Accuracy:
Attribute Accuracy Report:

The following statistics describes the accuracy of the final grid before smoothing:

Root mean squared error = 2351 mg/l

Mean error = -4.8 mg/l

Mean Standardized Error: 0.0109

Root mean square standardized: 1.000189

Average Standard error: 2077.185

The grid was smoothed using focal statistics which calculates for each input cell location a statistic of the values within a specified neighbourhood around it, in this case 5 km radius, smoothing the surface using the average cell value.

Logical Consistency Report: Grid cell spacing is 1000 m by 1000 m. Grid cells with no data are assigned the value -9999.
Completeness Report:
The final TDS surface map covers the extent of the Wapiti / Belly River HSU which was determined based on the lithostratigraphy, hydraulic properties and the extent of undivided Wapiti Formation in the west-central plains, and Belly River Group and its equivalents in the southern and east-central plains. Together, these formations were considered as a single hydrostratigraphic unit and the hydrogeological data were grouped to produce this map.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
The interpolated surface in the vicinity of water wells may have up to 400 m (occasionally 800 m) of horizontal error due to the positional accuracy of the input TDS point data from water wells. Wells in the AWWID are frequently placed in the middle of a quarter sections (occasionally a section) because their exact location within the quarter section (or section) is not known. The grid was smoothed using focal statistics which calculates for each input cell location a statistic of the values within a specified neighbourhood around it, in this case 5 km radius, smoothing the surface using the average cell value.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report:
See DIG 2016-0026 (data points) for details on the vertical accuracy of the input TDS 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: Nakevska, N.
Publication Date: 2019
Title:
Distribution of Total Dissolved Solids in the Wapiti / Belly River Hydrostratigraphic Unit (tabular data, tab-delimited format)
Geospatial Data Presentation Form: tabular digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2017-0026
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: 1961
Ending Date: 2013
Source Currentness Reference: ground condition
Source Citation Abbreviation: DIG 2017-0026
Source Contribution: Water chemistry data from water wells and oil and gas wells
Process Step:
Process Description:

Selection criteria for AWWID chemical analyses and formation water analysis from drillstem tests and production wells, as well as the final data set used for interpolation of this grid are documented in the metadata for AGS DIG 2017-0026.

Step 1 (Modelling the surface): A simple kriging algorithm was used in the ArcMap Geostatistical Analyst extension to interpolate the TDS values and create a grid of the TDS surface of the Wapiti / Belly River HSU.

Method Report:

Method: Kriging

Type: Simple

Transformation: Normal Score

Output type: Prediction

Trend type: None

Variogram: Semivariogram

Number of lags: 40

Lag size: 6800

Nugget:0.168

Measurement error percentage: 100

Model type: Spherical

Range: 272000

Anisotropy: No

Partial sill: 1.09

Total points: 908

Cell Size: 1000 m

Root mean square error: 2351 mg/L

Step 2 (Grid Alterations): The final grid was clipped to the extent of Wapiti / Belly River HSU. Focal statistics with circular neighborhood with radius of 5 km was performed on the final grid to smooth the surface.

Process Date: 2016
Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Pixel
Row Count: 747
Column Count: 688
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: meter
Geodetic Model:
Horizontal Datum Name: D North American 1983
Ellipsoid Name: GRS 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 modelled total dissolved solids, in mg/L.
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: 20190314
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