Storm Tide Flood Likelihood Areas for Brisbane

Four likelihood categories—High, Medium, Low, and Very Low—define storm tide flood extents for Brisbane's local government area. The dataset, created by Brisbane City Council in June 2013, maps flood risk based on Annual Exceedance Probability (AEP) and Average Recurrence Interval (ARI) statistics.

Use Cases

• Map High, Medium, Low, and Very Low likelihood areas to visualize spatial flood risk from storm tides.
• Analyze the relationship between Annual Exceedance Probability (AEP) values and their corresponding flood extents for hazard modeling.
• Integrate Average Recurrence Interval (ARI) statistics, such as the 100-year ARI for Medium likelihood, into regional flood preparedness plans.
• Compare storm tide flood extents defined by specific water level thresholds (e.g., 2.5mAHD for Medium likelihood) against land use data.

Strengths

• Defines four distinct flood likelihood categories (High, Medium, Low, Very Low) with clear probabilistic thresholds.
• Includes specific Annual Exceedance Probability (AEP) statistics, such as 1% AEP for the Medium likelihood layer.
• Links each likelihood category to concrete water level metrics (e.g., 2.85mAHD for the Low likelihood layer).

Limitations

• Core flood extent data originates from 2013 and may not reflect current coastal conditions or updated climate models.
• Data is specific to the Brisbane City Council area, limiting applicability to other geographic regions.
• Available only in HTML format, which complicates direct programmatic analysis and integration with GIS tools.

Provenance

Source

Brisbane City Council

Collection Method

Flood modeling for storm tide scenarios, defining extents based on Annual Exceedance Probability (AEP).

Time Range

Model created June 2013.

Freshness

Metadata updated March 2026, but underlying flood modeling data is from June 2013.

Geography

Brisbane City Council local government area, Australia.