Multibeam Sonar Backscatter Survey of Elizabeth and Middleton Reefs 2020

Multibeam sonar backscatter data for Middleton Reef and Elizabeth Reef within the Lord Howe Marine Park. The survey was conducted by Geoscience Australia from January 31 to February 6, 2020, using the vessel TV Bluefin to collect baseline benthic habitat information.

Use Cases

• Analyze backscatter data to classify and map benthic habitats within the National Park and Recreational Use Zones.
• Integrate bathymetry grids at 4-meter resolution with seabed imagery from AUVs for habitat modeling.
• Use baseline backscatter information to support environmental monitoring under the 10-year marine park management plan (2018-2028).
• Correlate multibeam sonar data with sediment samples and BRUV imagery to study seabed composition and demersal fish communities.

Strengths

• Data collected during a dedicated survey from January 31 to February 6, 2020.
• Bathymetry grids are provided at a 4-meter spatial resolution.
• Survey involved collaboration with multiple research institutions and government agencies.

Limitations

• Dataset is explicitly not to be used for navigational purposes, limiting its application scope.
• Specific technical details on data volume, row count, and column structure are unavailable.
• Data is a single snapshot from 2020 and may not reflect current seabed conditions.

Provenance

Source

Geoscience Australia

Collection Method

Multibeam sonar (Kongsberg EM 2040C HD, 300 kHz) seabed mapping from the vessel TV Bluefin, supplemented by AUV imagery, sediment grabs, and BRUVs.

Time Range

January 31 to February 6, 2020

Freshness

Survey data is from 2020; metadata was last updated in March 2026.

Geography

Middleton Reef and Elizabeth Reef within the Lord Howe Marine Park.