Calgary Flood Hazard Zoning Map

1983 flood modeling defines regulatory zones for the Bow River, Elbow River, Nose Creek, and West Nose Creek. Calgary's municipal government provides this map to enforce development and building regulations in designated floodway, flood fringe, and overland flood zones. The data was last updated in June 2024.

Use Cases

• Identify properties within specific regulatory flood zones (flood_cd) for land use bylaw enforcement.
• Analyze the spatial extent (multipolygon) of floodway versus flood fringe zones for infrastructure planning.
• Calculate the total area or perimeter of land parcels affected by different flood hazard designations.
• Cross-reference flood zone descriptions with property data to assess development restrictions.

Strengths

• Geospatial data includes defined flood_cd zones and geometry (multipolygon).
• Map is officially designated for regulatory use by the City of Calgary.
• Separate annotation file provides additional context for map features.

Limitations

• Underlying flood model is based on 1983 hydrological data, which may be outdated.
• Specific row count, total area covered, and data completeness metrics are unavailable.
• Data may not reflect the most recent flood risk assessments or climate models.

Provenance

Source

City of Calgary (data.calgary.ca).

Collection Method

Derived from 1:100 year flood extent calculations.

Time Range

Modeled from 1983 conditions.

Freshness

Last updated on 2024-06-27.

Geography

Calgary, Alberta, Canada, covering the Bow River, Elbow River, Nose Creek, and West Nose Creek watersheds.