HRWP Percent Impervious Cover Reach Contributing Area

Habitat quality was measured using the percentage of land cover that is classified as impervious, where more impervious cover is associated with lower habitat quality. Impervious cover was calculated for the baseline and current period at the watershed, subwatershed, catchment, and RCA scales using a desktop GIS analysis. To do so, land use types for 2002, 2012 and 2020 were given an overall impervious value calculated by summarizing area as a function of the runoff coefficient (here referred to as the Directly Connected Impervious Cover/Area). Calculations were completed in excel and in GIS and appended to the spatial data layer in the .gdb file created by GIS team found here: S:\ProjectMgMT_2021\DES\WshdPlnReporting\HumberWatershedPlanning_16March2021\GIS_request\Impervious_Jonathan_20220512\RCA_24subwatershed.gdb

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Additional Info

Field Value
Last Updated May 19, 2026, 16:31 (UTC)
Created May 19, 2026, 16:31 (UTC)
Domain / Topic
Domain or topic of the dataset being cataloged.
Title
Title for the Dataset.
HRWP Percent Impervious Cover Reach Contributing Area
Description
A description of the dataset.

Habitat quality was measured using the percentage of land cover that is classified as impervious, where more impervious cover is associated with lower habitat quality. Impervious cover was calculated for the baseline and current period at the watershed, subwatershed, catchment, and RCA scales using a desktop GIS analysis. To do so, land use types for 2002, 2012 and 2020 were given an overall impervious value calculated by summarizing area as a function of the runoff coefficient (here referred to as the Directly Connected Impervious Cover/Area). Calculations were completed in excel and in GIS and appended to the spatial data layer in the .gdb file created by GIS team found here: S:\ProjectMgMT_2021\DES\WshdPlnReporting\HumberWatershedPlanning_16March2021\GIS_request\Impervious_Jonathan_20220512\RCA_24subwatershed.gdb
Tags / Keywords
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Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
Dataset Size
Dataset size in megabytes.
4760.0
Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date
Published date of the dataset.
2023-10-17
Time Period Data Span (start date)
Start date of the data in the dataset.
Time Period Data Span (end date)
End date of time data in the dataset.
GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
Field Value
Access category
Type of access granted for the dataset (open, closed, service, etc).
public
License
License used to access the dataset.
Toronto and Region Conservation Authority (TRCA) Open Data Licence v1.0 - Toronto and Region Conservation Authority (TRCA)
Limits on use
Limits on use of data.
Location
Location of the dataset.
https://trca-camaps.opendata.arcgis.com/datasets/camaps::hrwp-percent-impervious-cover-reach-contributing-area-
Data Service
Data service for accessing a dataset.
Owner
Owner of the dataset.
jason.tam
Contact Point
Who to contact regarding access?
Conservation Ontario
Contact Point Email
The email to contact regarding access?
[email protected]
Publisher
Publisher of the dataset.
Conservation Ontario
Publisher Email
Email of the publisher.
Author
Author of the dataset.
jason.tam
Author Email
Email of the author.
Accessed At
Date the data and metadata was accessed.
2023-10-18
Field Value
Identifier
Unique identifier for the dataset.
015d7cbbda754ddf87111d6c4fcef317
Language
Language(s) of the dataset
English
Link to dataset description
A URL to an external document describing the dataset.
https://trca-camaps.opendata.arcgis.com/datasets/camaps::hrwp-percent-impervious-cover-reach-contributing-area-
Persistent Identifier
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Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
Contains data about individuals
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Contains data about identifiable individuals
Does the data hold identifiable data about individual?
Contains Indigenous Data
Does the data hold data about Indigenous communities?
Portal Type
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Field Value
Version
Version of the datatset
None
Source
Source of the dataset.
None
Version notes
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Is version of another dataset
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Other versions
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Provenance Text
Provenance Text of the data.
Conservation Ontario
Provenance URL
Provenance URL of the data.
Temporal resolution
Describes how granular the date/time data in the dataset is.
GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
Field Value
Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission
Community permission (who gave permission).
The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
Field Value
Number of data rows
If tabular dataset, total number of rows.
419
Number of data columns
If tabular dataset, total number of unique columns.
11
Number of data cells
If tabular dataset, total number of cells with data.
4609
Number of data relations
If RDF dataset, total number of triples.
Number of entities
If RDF dataset, total number of entities.
Number of data properties
If RDF dataset, total number of unique properties used by the triples.
Data quality
Describes the quality of the data in the dataset.
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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