GEOMAT: Modelling of Continental Shelf Sediment Mobility

GEOMAT is a geological-oceanographic computer modelling project from a team including AGSO, the University of Tasmania, the Australian Bureau of Meteorology, and a Danish geodetic division. It uses tidal and swell-wave models to predict sediment mobilisation on the Australian continental shelf, defining six regions of relative wave and tidal energy. The work provides a process-based understanding of the shelf sedimentary system, useful for explaining sediment patterns and potentially mapping biological habitats.

Use Cases

• Predicting sediment mobilisation thresholds based on modelled wave and tidal energy.
• Regionalising the continental shelf into areas of wave-dominated, tide-dominated, or mixed energy regimes.
• Informing marine planning and habitat mapping by explaining surficial sediment distribution patterns.

Strengths

• Model outputs provide specific, quantified predictions, such as swell waves mobilising fine sand over 63.5% of the shelf.
• Defines six distinct shelf regions (e.g., waves-only, tide-dominated) based on relative energy, offering a structured classification.
• Project is a multi-institutional collaboration, suggesting peer-reviewed methodology.

Limitations

• Core dataset structure (columns, rows, file format) is not described in the provided metadata.
• The 'last updated' metadata dates (2026-04-16) are implausibly in the future, indicating potential platform metadata errors.
• Descriptions reference a report (likely PDF/HTML), so the primary data may be embedded within documents rather than in a directly analyzable format.

Provenance

Source

Australian Ocean Data Network (AODN), via data.gov.au.

Collection Method

Computer modelling project synthesizing tidal and swell-wave data.

Time Range

Model application period referenced is March 1997 to February 1998.

Freshness

2026-04-16 15:13:15.516085

Geography

Australian continental shelf, with specific mention of the Great Australian Bight.