Elizabeth and Middleton Reef Seafloor Bathymetry Survey 2020

312 km2 of seafloor bathymetry data was collected for Elizabeth and Middleton Reefs within the Lord Howe Marine Park. Geoscience Australia led the survey from January 31 to February 6, 2020, in collaboration with several research institutions and Parks Australia. The data provides baseline information for benthic habitats to support a 10-year environmental monitoring plan.

Use Cases

• Model benthic habitat types using 5-meter resolution bathymetry grids and AUV-collected seabed imagery.
• Analyze seafloor geomorphology and slope from multibeam sonar-derived bathymetry data.
• Correlate sediment sample data with bathymetric features to understand seabed composition.
• Use baited remote underwater video (BRUV) imagery with location data to study demersal fish communities relative to depth.
• Support marine park management by establishing baseline seafloor maps for the National Park and Recreational Use Zones.

Strengths

• High spatial resolution bathymetry data gridded at 5 meters.
• Covers a combined survey area of 312 km2 around two distinct reef systems.
• Multimodal data collection includes sonar, AUV imagery, sediment samples, and BRUV footage for cross-validation.
• Data supports a defined 10-year management plan (2018-2028) for the marine park.

Limitations

• Dataset is a snapshot from a single survey period in early 2020, lacking temporal depth.
• Specific row counts, column details, and sample data for ancillary datasets (e.g., sediment, BRUV) are unavailable.
• The bathymetry grids are not intended for navigational purposes, indicating potential positional uncertainties for safety-critical applications.

Provenance

Source

Geoscience Australia, collected via the Australian Maritime College vessel TV Bluefin.

Collection Method

Seabed mapping using Kongsberg EM 2040C HD multibeam sonar, AUV imagery, sediment grabs, and baited remote underwater video (BRUV).

Time Range

Survey conducted from 31 January to 6 February 2020.

Freshness

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

Geography

Elizabeth and Middleton Reefs within the Lord Howe Marine Park, Australia.