Hydrological

Digital Flood Hazard Mapping

Identification Information

Abstract

Important: The Digital Flood Hazard Mapping data was updated on 2015-06-22. The previous dataset dated 2013-08-09 should be discarded and replaced with the 2015-06-22 dataset.

Alberta Environment and Parks identifies flood hazard areas across the province as part the Flood Hazard Identification Program. Studies commissioned as part of the program are comprised of reports and mapping. Flood hazard mapping delineates areas that would be inundated during the 100-year design flood under encroached conditions and provides design flood levels along study cross sections.

The Digital Flood Hazard Mapping data is created to increase public safety and awareness of flood hazards, and be used as a planning tool by all levels of government and the public to mitigate future flood damages.

Note that this Digital Flood Hazard Mapping data may not reflect official flood hazard areas delineated in original hardcopy mapping produced under the Flood Hazard Identification Program. Contact the River Forecast Section for clarification if the precise flood hazard extent or a design flood level is critical to any application. This digital data archive is updated when new information is available or existing information changes, and the currency of its flood hazard mapping assets are not guaranteed.

Please refer to the Supplemental Information section of the metadata for important information regarding data and conversion processes.

The flood hazard area is divided into Floodway and Flood Fringe components to support appropriate flood hazard area management.

  • The floodway area is the portion of the river channel and floodplain required to convey the 100-year design flood. The floodway is where flood flows are deepest, fastest and most destructive. New development is discouraged in the floodway and may not be permitted in some communities.
  • The flood fringe is the area outside of the floodway that will still be flooded during the design event, and may include overland flow (flood fringe) areas. The water in the flood fringe is generally less than one metre deep and flows more slowly. Development in the flood fringe may be permitted provided that it’s adequately flood-proofed to accommodate design flood elevations and any required freeboard.

The current design flood standard in Alberta is the 100-year flood, determined when a flood hazard study is undertaken. A 100-year flood is defined as a flood whose magnitude has a one per cent chance of being equalled or exceeded in any year. The design flood can also reflect a computed 100-year water level resulting from an ice jam or be based on a historical flood event.

Design flood levels are water elevations within a flood hazard area computed to result from a design flood under encroachment conditions. Encroachment conditions assume a future scenario where the flood fringe is fully developed and flood flows are conveyed entirely within the floodway. Design flood levels should not change as a result of development or obstruction of flows within the flood fringe.

More information on the Flood Hazard Identification Program:

The website includes synopses and background information for all official AEP flood hazard studies.

Official flood hazard mapping for communities across Alberta is available online using the Flood Hazard Map Application:

The application uses GIS technology to display mapped areas, including cross-section locations and design flood levels along with links to specific study pages.

Flood hazards have not been identified in all communities and may exist in areas without official flood hazard mapping produced under the provincial Flood Hazard Identification Program. Contact the River Forecast Section for additional information.

Distribution Information

Format Name

ESRI – Shapefile

Fees

Free of Charge (Electronic Delivery)

Request this digital product

For detailed instructions, see:

Metadata Reference Information

Detailed metadata for this product may be viewed on GeoDiscover Alberta.

To discover the metadata, click "Catalogue Search" and in the "Search" box, type in: Digital Flood Hazard Mapping

Fish and Wildlife Management Information System (FWMIS) - Hydrology Arcs and Polygons

Identification Information

Abstract

The Fish and Wildlife Management Information System (FWMIS) - Hydrology Arcs and Polygons are derived from the Base Features Derived Simplified Linear Network, which is a derivative of the Single Line Hydrography Network (Base Stream and Flow Representation) dataset and Base Features Waterbody Polygon (Base Waterbody Polygon) dataset.

FWMIS Hydrology Arcs have been modified for Fish and Wildlife business purposes, where spatial adjustments and field attributes have been added or removed as required. Modifications include, but are not limited to, the addition of a 'Species Presence' field, edits to spatial and aspatial components, removal of topological error, and semi-annual maintenance as required.

This layer provides:

  • fish species presence (both current and historic),
  • Fish and Wildlife Management Information System (FWMIS) Waterbody ID, FWMIS Waterbody ID's are unique values assigned to mapped waterbodies with or without fish or fish habitat survey information (both current and historic),
  • Waterbody Official and Common Names, and
  • Strahler Stream Order information.

FWMIS Hydropolygon has been modified for Fish and Wildlife business purposes, where spatial adjustments and field attributes have been added or removed as required. Modifications include, but are not limited to, the addition of a 'Species Presence' field, edits to spatial and aspatial components, removal of topological error, and semi-annual maintenance as required.

This layer provides:

  • fish species presence (both current and historic),
  • Fish and Wildlife Management Information System (FWMIS) Waterbody ID, and Waterbody Official and Common Name.

Coverage Map

Data Coverage Map - Download (WinZip .zip file)

This shapefile is only an extent of the coverage and not the actual data. The Fish and Wildlife Management Information System (FWMIS) - Hydrology Arcs and Polygons data must be requested as indicated below in the Distribution Information.

Distribution Information

Format Name

ESRI – File Geodatabase

ESRI – Shapefile

Fees

Free of Charge (Electronic Delivery)

Request this digital product

For detailed instructions, see:

Metadata Reference Information

Detailed metadata for this product may be viewed on GeoDiscover Alberta.

To discover the metadata, click "Catalogue Search" and in the "Search" box, type in: Fish and Wildlife Management Information System (FWMIS) – Hydrology

Groundwater Vulnerability

Identification Information

Abstract

The groundwater vulnerability maps were prepared for the;

  • North Saskatchewan Regional Planning area (NSRP)
  • Red Deer Regional Planning area (RDRP)
  • South Saskatchewan Region (SSR)

and provide a high level overview of the sensitivity of shallow groundwater quality to potential impacts by surface activities.

The groundwater vulnerability mapping was conducted based on the work originally done by Prairie Farm Rehabilitation Administration (PFRA, now Agriculture and Agri-Food Canada) and Alberta Agriculture and Rural Development (Dash and Rodvang, 2001).

The final groundwater vulnerability is ranked as;

  • Low,
  • Medium,
  • High, and
  • Very High

providing relative risk to groundwater quality from land-based activities.

Browse Graphic

Metadata Reference Information

Detailed metadata for this product may be viewed on GeoDiscover Alberta.

To discover the metadata, click "Catalogue Search" and in the "Search" box, type in: Groundwater Vulnerability

Distribution Information

Format Name

ESRI – File Geodatabase

Fees

Free of Charge (Electronic Delivery)

Request this digital product

For detailed instructions, see:

Hydrologic Unit Code Watersheds of Alberta

Identification Information

Abstract

The Hydrologic Unit Code Watersheds of Alberta (HUC) represents a collection of four nested hierarchically structured drainage basin feature classes that have been created using the Hydrologic Unit Code system of classification developed by the United States Geological Survey (USGS) with accommodation to reflect the pre-existing Canadian classification system

The HUC Watersheds of Alberta consist of successively smaller hydrologic units that nest within larger hydrologic units, resulting in a hierarchal grouping of alphanumerically-coded watersheds feature classes.

These drainage areas are subject to periodic review and update. These nesting watersheds feature classes were created using ArcHydro Tools v.2 (Alberta Environment and Parks).

There are currently individual feature classes for:

  • HUC 2 (coarsest level),
  • HUC 4,
  • HUC 6, and
  • HUC 8, and
  • HUC 10 (finest level)

These are all contained within a single feature dataset.

NOTE: This dataset co-exists with the Watersheds of Alberta 2011 as well as a number of other non-GOA watersheds datasets such as the Prairie Farm Rehabilitation Administration watersheds data published by Agriculture and Agri-Food Canada.

Browse Graphic

Data Extent Index Map – Download

Distribution Information

Format Name

ESRI – Shapefile and File Geodatabase

Fees

Free of Charge (Electronic Delivery)

Request this digital product

For detailed instructions, see:

Metadata Reference Information

Detailed metadata for this product may be viewed on GeoDiscover Alberta.

To discover the metadata, click "Catalogue Search" and in the "Search" box, type in: Hydrologic Unit Code Watersheds of Alberta

Wet Areas Mapping

Identification Information

Abstract

This data collection contains wet areas map data derived from one metre spatial resolution digital terrain models, which were in turn interpolated from light detection and ranging (lidar) ground returns.

The primary purpose of this data is to inform land managers of the potential presence of:

  • sensitive aquatic habitats, and
  • soils sensitive to disturbance.

Early identification of these features in the planning process should contribute to achieving goals related to land stewardship and sustainability. This product was developed primarily to assist Alberta's forest sector in ensuring the sustainability of these sensitive areas that are threatened by the mountain pine beetle infestation.

The coverage of Wet Areas Mapping currently includes:

  • Legacy Data Model – Phases 1 and 2
  • Revised Data Model – by 1:250 000 NTS mapsheet

Note that some of the Phase 1 and 2 areas have not yet been replaced with the revised data model product and they should continue to be used until future replacements are available.

The Wet Areas Mapping data contains the following products:

  • Predicted Stream Channels (ESRI shapefiles)
  • Predicted Depth To Water Rasters
    • Classified surfaces (Geotiffs), and
    • Continuous estimates (ESRI ArcInfo grids; not available for Phase 1 and 2)
  • Flow Accumulation Rasters (ESRI ArcInfo grids; not available for Phase 1 and 2)
  • Flow Direction Rasters (ESRI ArcInfo grids; not available for Phase 1 and 2)

Note that due to the file size of these data sets, the data has been packaged into separate geographic areas of the province. With the exception of Phase 1 and 2 areas, more recent updates to the collection are distributed by 1:250 000 NTS map sheet extents.

Coverage Map

Data Coverage Map – Download (WinZip .zip file)

This shapefile is only an extent of the coverage and not the actual data. The Wet Areas Mapping data must be requested as indicated below in the Distribution Information.

Distribution Information

Format Name

ESRI – Shapefile / ESRI - ArcInfo grid rasters
Geotiff rasters

Fees

Free of Charge

Request this digital product

For detailed instructions, see:

Metadata Reference Information

Detailed metadata for this product may be viewed on GeoDiscover Alberta.

To discover the metadata, click "Catalogue Search" and in the "Search" box, type in: Wet Areas Mapping

Watersheds of Alberta (GOA)

Identification Information

Abstract

The Watersheds of Alberta (GOA) is a digital spatial database depicting various classification levels of watersheds and drainage basins within the province of Alberta as interpreted by Environment and Parks.

The base unit of mapping is the Water Survey of Canada (WSC) region, which is an administrative designation (system) based on catchment areas. There are 132 WSC regions defined within Alberta; each is classified with a "00ZZ" alpha-numerical coding system.

These units have been grouped into four major levels of drainage basin classification:

  • Major Sub-watersheds
  • Watersheds of Alberta
  • Major Basins (2 versions), and
  • Continental Drainage (2 versions)

The data represents an accumulated 20 to 25 years of project work of the Hydrology Branch which also held the mandate to determine watersheds and watershed boundaries within the Government of Alberta.

Boundaries were delineated and refined over time using 1:50,000 NTS topographic maps and some air photography of various scales.

NOTE:

  • Previous versions of this data set have been made available as "Watersheds of Alberta 2011", "Watersheds of Alberta", and "Drainage Basins of Alberta". All of these former data sets are no longer valid and have been superseded by the Watersheds of Alberta (GOA).
  • Also, this dataset co-exists with the Hydrologic Unit Code Watersheds of Alberta as well as a number of other non-GOA watersheds datasets such as the Prairie Farm Rehabilitation Administration (PFRA) watersheds data published by Agriculture and Agri-Food Canada.
Metadata Reference Information

Detailed metadata for this product may be viewed on GeoDiscover Alberta.

To discover the metadata, click "Catalogue Search" and in the "Search" box, type in: Watersheds of Alberta (GOA)

Distribution Information

Format Name

ESRI - ShapeFile and File Geodatabase

Fees

Free of Charge (Electronic Delivery)

Request this digital product

For detailed instructions, see:

Many other geospatial data products are offered by other Government of Alberta ministries. GeoDiscover Alberta offers a discovery service to search for geospatial products.

 

Page Information

Updated: Jun 2, 2017