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Seabed morphology and geomorphology of the Beagle Marine Park, south-eastern Australia - Version 1

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Created 13/01/2025

Updated 13/01/2025

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This data product contains geospatial seabed morphology and geomorphology information for the Beagle Marine Park and is intended for use by marine park managers, regulators, the general public and other stakeholders. A nationally consistent two-part (two-step) seabed geomorphology classification system was used to map and classify the distribution of key seabed features.

In step 1, semi-automated GIS mapping tools (GA-SaMMT; Huang et al., 2022; eCat Record 146832) were applied to bathymetry digital elevation models (DEM) in a GIS environment (ESRI ArcGIS Pro) to map polygon extents (topographic high, low, and planar) and quantitatively characterise their geometries. The geometric attributes were then used to classify each shape into discrete Morphology Feature types (Part 1: Dove et al., 2020; eCat Record 144305). In step 2, the seabed geomorphology was interpreted by applying additional datasets and domain knowledge to inform their geomorphic characterisation (Part 2: Nanson et al., 2023; eCat Record 147818). Where available, backscatter intensity, seabed imagery, seabed sediment samples and sub-bottom profiles supplemented the bathymetry DEM and morphology classifications to inform the geomorphic interpretations.

The Beagle Marine Park seabed morphology and geomorphology features were informed by a post survey report (Barrett et al., 2021). Seabed units were classified at multiple resolutions that were informed by the underlying bathymetry:

· A broad scale layer represents features that were derived from a 30 m horizontal resolution compilation DEM (Beaman et al 2022; eCat Record 147043). · A series of medium and fine scale feature layers were derived from individual 1 m horizontal resolution DEMs (Nichol et al., 2019; eCat Record 130301).

The data product and application schema are fully described in the accompanying Data Product Specification.

Barrett, N, Monk, J., Nichol, S., Falster, G., Carroll, A., Siwabessy, J., Deane, A., Nanson, R., Picard, K., Dando, N., Hulls, J., and Evans, H. (2021). Beagle Marine Park Post Survey Report: South-east Marine Parks Network. Report to the National Environmental Science Program, Marine Biodiversity Hub. University of Tasmania.

Beaman, R.J. (2022). High-resolution depth model for the Bass Strait -30 m. https://dx.doi.org/10.26186/147043, GA eCat Record 147043. 

Dove, D., Nanson, R., Bjarnadóttir, L. R., Guinan, J., Gafeira, J., Post, A., Dolan, Margaret F.J., Stewart, H., Arosio, R., Scott, G. (2020). A two-part seabed geomorphology classification scheme (v.2); Part 1: morphology features glossary. Zenodo. https://doi.org/10.5281/zenodo.4075248; GA eCat Record 144305 

Huang, Z., Nanson, R. and Nichol, S. (2022). Geoscience Australia's Semi-automated Morphological Mapping Tools (GA-SaMMT) for Seabed Characterisation. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/146832; GA eCat Record 146832   Nanson, R., Arosio, R., Gafeira, J., McNeil, M., Dove, D., Bjarnadóttir, L., Dolan, M., Guinan, J., Post, A., Webb, J., Nichol, S. (2023). A two-part seabed geomorphology classification scheme; Part 2: Geomorphology classification framework and glossary (Version 1.0) (1.0). Zenodo.https://doi.org/10.5281/zenodo.7804019; GA eCat Record 147818 

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Title Seabed morphology and geomorphology of the Beagle Marine Park, south-eastern Australia - Version 1
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/d3b75c0f-59bb-4f09-99e7-7f484f7f9b1c
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 08/06/2023
Geospatial Coverage {"type": "Polygon", "coordinates": [[[146.5, -39.6], [147.5, -39.6], [147.5, -39.1], [146.5, -39.1], [146.5, -39.6]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Seabed morphology and geomorphology of the Beagle Marine Park, south-eastern Australia - Version 1". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/seabed-morphology-and-geomorphology-of-the-beagle-marine-park-south-eastern-australia-version-1

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