Perth Submarine Canyon Geomorphic Classification and Mapping

Geoscience Australia applied a new genetic classification system to map the Perth submarine canyon, an area exceeding 1500 km2. The work uses 20-meter resolution bathymetry and acoustic backscatter data from 2015, integrated with sub-bottom and sediment data from 2005. This mapping aims to define spatial patterns of seabed habitats within a Marine Protected Area off southwest Australia.

Use Cases

• Apply the genetic classification framework to delineate sub-features within the canyon using topographic metrics and shelf-incising status.
• Analyze spatial patterns of seabed habitats by integrating 20 m resolution bathymetry and acoustic backscatter data.
• Correlate geomorphic feature maps with benthic biodiversity values in the Marine National Park and Habitat Protection Zone.
• Validate established classification schemes from the IHO and CMECS using high-resolution marine geophysical data.

Strengths

• Covers a significant area of over 1500 square kilometers for the Perth submarine canyon.
• Utilizes high-resolution 20-meter bathymetry and acoustic backscatter data.
• Integrates multiple data sources including sub-bottom profiles and sediment samples.
• Applies a structured genetic classification nested within a global seafloor mapping framework.

Limitations

• Specific row and column counts, sample data, and file sizes are unavailable.
• Primary geophysical data is from 2015, with supplemental sediment data from 2005, potentially limiting temporal currency.
• Data presentation is in HTML format, which may not be directly machine-readable for analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Semi-automated geomorphic mapping using high-resolution multibeam echo-sounding, sub-bottom profiling, and sediment samples.

Time Range

Primary bathymetry from 2015, with supplemental data from 2005.

Freshness

null

Geography

Perth submarine canyon, continental slope and shelf of southwest Australia, from 170 m to 4700 m water depth.