Spatially Varying Tidal Planes for Tsunami Hazard Assessment in Gladstone, Australia

Geoscience Australia Data presented a method for tsunami hazard assessment that accounts for spatially varying Highest Astronomical Tide (HAT) levels. The technique is demonstrated using the Gladstone region as a case study, with tests comparing tsunami scenarios at different HAT levels and 'mini' probabilistic hazard assessments at three sites. The work was presented at the 2025 Australasian Coasts & Ports Conference.

Use Cases

• Refining tsunami evacuation zones based on spatially varying tidal planes mentioned in the description
• Modeling marine hazards from tsunamis using nested grids with 10m resolution described in the case study
• Comparing probabilistic tsunami hazard assessment results for sites with different HAT levels, such as Lady Elliot Island and Rosslyn Bay

Strengths

• Method addresses a specific limitation in hazard assessment by accounting for HAT variations from 1.4m to over 5.4m along Queensland's Coast
• Case study uses nested grids with resolution down to 10 meters to resolve inundation
• Tests include comparisons of 'mini' probabilistic tsunami hazard assessments at three distinct sites

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
• Data may reflect geographic bias inherent to the single case study region of Gladstone

Provenance

Source

Geoscience Australia Data

Collection Method

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

Freshness

Last updated 2026-04-30 13:56:25.361908; freshness should be verified

Geography

Gladstone region and Queensland coast, Australia, including Lady Elliot Island, South Trees, and Rosslyn Bay.