TRSPA SWP WHPAQ Downgradient Line
Polyline to show that areas below (south) of the line are considered to be areas which are 'downgradient' of municipal wells.
WHPA-Q Downgradient Line Determination
Considerations (in order of priority)
The “Downgradient Line” cannot cross any of WHPA-A, B, C, D, E, or F. By definition, flow in the aquifer reaches the well(s) in any of these locations. Therefore, recharge in these WHPAs cannot be considered as being downgradient in the absence of updated numerical modelling.
The “Downgradient Line” must take into account the regional groundwater flow directions in the Oak Ridges, Thorncliffe, and Scarborough Aquifers, because all three aquifers are utilized for groundwater supplies.
The downgradient line should avoid sharp bends and curves, since groundwater flow generally does not behave that way.
If the downgradient line is close to a municipal boundary, and can be shifted such that the municipality is excluded, without compromising any of the above considerations, the line should be moved accordingly.
If the downgradient line is close to an approved settlement area, and can be shifted such that the settlement area is excluded, without compromising any of the above considerations, the line should be moved accordingly.
If the downgradient line bisects a property boundary, and can be shifted such that a property can be excluded without compromising any of the above considerations, the line should be moved accordingly.
*NOTE: this line was revised April, 2021 after amendments that incorporated new technical work at Aurora Well 7 were completed. The new technical work resulted in the WHPA-D zone extending south over the previous WHPA-Q downgradient Line.
Datasets available for download
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TRSPA SWP WHPA-Q Downgradient LineFeature Layer
Layer 0 via ArcGIS REST API
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TRSPA SWP WHPA-Q Downgradient Line (Explore)HTML
Explore TRSPA SWP WHPA-Q Downgradient Line on ArcGIS Hub
Additional Info
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| Last Updated | May 19, 2026, 16:31 (UTC) |
| Created | May 19, 2026, 16:31 (UTC) |
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Domain / Topic
Domain or topic of the dataset being cataloged.
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Title
Title for the Dataset.
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TRSPA SWP WHPAQ Downgradient Line |
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Description
A description of the dataset.
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Polyline to show that areas below (south) of the line are considered to be areas which are 'downgradient' of municipal wells. WHPA-Q Downgradient Line Determination Considerations (in order of priority)
*NOTE: this line was revised April, 2021 after amendments that incorporated new technical work at Aurora Well 7 were completed. The new technical work resulted in the WHPA-D zone extending south over the previous WHPA-Q downgradient Line. |
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Keywords/tags categorizing the dataset.
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Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
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Dataset Size
Dataset size in megabytes.
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48.0 |
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Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
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Published Date
Published date of the dataset.
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2024-01-23 |
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Time Period Data Span (start date)
Start date of the data in the dataset.
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Time Period Data Span (end date)
End date of time data in the dataset.
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GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
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Access category
Type of access granted for the dataset (open, closed, service, etc).
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public |
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License
License used to access the dataset.
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License not specified |
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Limits on use
Limits on use of data.
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Location
Location of the dataset.
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https://trca-camaps.opendata.arcgis.com/datasets/camaps::trspa-swp-whpaq-downgradient-line |
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Data Service
Data service for accessing a dataset.
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Owner
Owner of the dataset.
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trca_d.macleod |
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Contact Point
Who to contact regarding access?
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Conservation Ontario |
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Contact Point Email
The email to contact regarding access?
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[email protected] |
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Publisher
Publisher of the dataset.
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Conservation Ontario |
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Publisher Email
Email of the publisher.
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Author
Author of the dataset.
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trca_d.macleod |
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Author Email
Email of the author.
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Accessed At
Date the data and metadata was accessed.
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2024-01-23 |
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Identifier
Unique identifier for the dataset.
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e3f81751fd914c77b047c9e9aa720997 |
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Language
Language(s) of the dataset
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English |
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Link to dataset description
A URL to an external document describing the dataset.
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https://trca-camaps.opendata.arcgis.com/datasets/camaps::trspa-swp-whpaq-downgradient-line |
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Persistent Identifier
Data is identified by a persistent identifier.
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Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
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Contains data about individuals
Does the data hold data about individuals?
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Contains data about identifiable individuals
Does the data hold identifiable data about individual?
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Contains Indigenous Data
Does the data hold data about Indigenous communities?
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Portal Type
Platform type of the source portal.
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Version
Version of the datatset
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None |
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Source
Source of the dataset.
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None |
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Version notes
Version notes about the dataset.
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Is version of another dataset
Link to dataset that it is a version of.
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Other versions
Link to datasets that are versions of it.
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Provenance Text
Provenance Text of the data.
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Conservation Ontario |
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Provenance URL
Provenance URL of the data.
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Temporal resolution
Describes how granular the date/time data in the dataset is.
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GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
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GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
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Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
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Community Permission
Community permission (who gave permission).
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The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
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Number of data rows
If tabular dataset, total number of rows.
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1 |
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Number of data columns
If tabular dataset, total number of unique columns.
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2 |
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Number of data cells
If tabular dataset, total number of cells with data.
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2 |
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Number of data relations
If RDF dataset, total number of triples.
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Number of entities
If RDF dataset, total number of entities.
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Number of data properties
If RDF dataset, total number of unique properties used by the triples.
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Data quality
Describes the quality of the data in the dataset.
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Metric for data quality
A metric used to measure the quality of the data, such as missing values or invalid formats.
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