Ottawa and Gatineau Rivers Floodplain Zoning Map for High and Low Current Areas

City of Gatineau's Department of Urban Planning and Sustainable Development provides a geospatial dataset mapping high and low current zones along the Ottawa and Gatineau rivers. The data defines floodplains based on a 20-year recurrence interval for high-current zones and a 100-year recurrence interval for low-current zones, supporting zoning by-law 502-2005. The dataset was last updated on the platform in April 2026 and is available in SHP, GEOJSON, and KML formats.

Use Cases

• Modeling flood risk for property development based on defined 20-year and 100-year recurrence intervals.
• Informing municipal zoning by-law amendments using the officially adopted floodplain boundaries.
• Analyzing hydrological patterns and current strength in the Ottawa and Gatineau rivers for environmental studies.

Strengths

• Data is tied to a specific, enforceable municipal zoning by-law (502-2005) and its amendment.
• Flood zones are defined using concrete hydrological recurrence intervals (20-year and 100-year floods).
• Available in multiple standard geospatial formats (SHP, GEOJSON, KML) for interoperability.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and spatial resolution are unknown, which may limit suitability assessment.
• The description contains repetitive text, suggesting potential metadata quality issues.

Provenance

Source

City of Gatineau, Department of Urban Planning and Sustainable Development.

Collection Method

Mapping derived from two technical reports: JFSA (April 2014) and Quebec Water Expertise Center (March 2008).

Time Range

The supporting by-law amendment (502-237-2017) came into force on July 24, 2017.

Freshness

Last updated 2026-04-22 17:34:12.103801; freshness should be verified against the original by-law.

Geography

Ottawa and Gatineau rivers within the jurisdiction of Gatineau, Québec, Canada.