Database of Areas at Risk of Flooding (BDZI): Quebec Flood Zone Mapping

BDZI contains flood zone mapping for Quebec from programs spanning 1976 to 2004 and beyond. The data is provided by the Government and Municipalities of Québec under a CC-BY-4.0 license. It was last updated on the platform in April 2026.

Use Cases

• Model flood risk for property development based on historical flood zone mapping.
• Assess climate change impacts on floodplains based on multi-decade mapping programs.
• Inform municipal zoning and insurance rate setting based on designated flood risk areas.
• Conduct historical analysis of flood zone evolution based on data from 1976 onward.

Strengths

• Data originates from authoritative government mapping programs in Quebec.
• Covers a long temporal range, with mapping efforts noted from 1976 to 2004 and later.
• Available in multiple geospatial formats including ESRI REST, GPKG, and FGDB/GDB.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Government and Municipalities of Québec | Gouvernement et municipalités du Québec

Collection Method

Mapping carried out under the Canada-Quebec Convention (1976-2001), the Program for the determination of flood ratings (2001-2004), and subsequent work by the Centre d'expertise du Québec (CEH).

Time Range

Mapping programs noted from 1976 to 2004, with work continuing after that date.

Freshness

Last updated 2026-04-22 19:09:06.467468; freshness should be verified.

Geography

Quebec, Canada