Spatially Varying Tidal Planes for Tsunami Hazard Assessment in Gladstone Region

Australian Ocean Data Network presents a 2025 conference paper detailing a technique for tsunami hazard assessment that accounts for spatially varying Highest Astronomical Tide (HAT) levels. The method is demonstrated using the Gladstone region as a case study, with comparisons at sites like Lady Elliot Island (HAT 1.4 m) and near St Lawrence (HAT over 5.4 m). Simulations use nested grids with resolution down to 10 meters to resolve inundation, leveraging scenarios from the 2018 Australian Probabilistic Tsunami Hazard Assessment.

Use Cases

• Modeling tsunami inundation with spatially varying tidal planes based on the described tidal adjustment technique.
• Conducting probabilistic tsunami hazard assessments based on the use of four major earthquake source zones and importance sampling.
• Comparing tsunami scenarios at different HAT levels, such as between Lady Elliot Island and Rosslyn Bay, as mentioned in the case study.
• Supporting tsunami evacuation planning by producing inundation estimates derived from hydrodynamic models.

Strengths

• Method addresses a specific limitation in hazard assessment by modeling spatially inhomogeneous tidal planes.
• Case study includes concrete HAT level comparisons, such as 1.4 m at Lady Elliot Island versus over 5.4 m near St Lawrence.
• Simulations use nested grids with high spatial resolution down to 10 meters.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The primary data format is PDF, which may limit direct computational analysis.

Provenance

Source

Australian Ocean Data Network

Collection Method

Proposed modeling technique demonstrated via case study using nested grid simulations.

Time Range

References the 2018 Australian Probabilistic Tsunami Hazard Assessment.

Freshness

Last updated 2026-04-10 16:48:29.474788; freshness should be verified.

Geography

Focus on northern Australia, specifically the Gladstone region and Queensland's Coast, including sites like Lady Elliot Island, South Trees, and Rosslyn Bay.