Data

Mapping and classification of Darwin Harbour seabed

University of Tasmania, Australia
Siwabessy, P.J.W. ; Tran, M. ; Huang, Z. ; Nichol, S.L. ; Atkinson, I.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://metadata.imas.utas.edu.au/geonetwork/srv/eng/search?uuid=f4878405-a569-0030-e044-00144fdd4fa6&rft.title=Mapping and classification of Darwin Harbour seabed&rft.identifier=http://metadata.imas.utas.edu.au/geonetwork/srv/eng/search?uuid=f4878405-a569-0030-e044-00144fdd4fa6&rft.description=This data presents the results of seabed mapping and habitat classification surveys completed in Darwin Harbour during 2011 and 2013 as part of the Northern Territory Government's marine habitat mapping program. This research is a collaboration between Geoscience Australia (GA), the Australian Institute of Marine Science (AIMS), the Department of Land Resource Management (DLRM) and the Darwin Port Corporation. Key objectives are to: - Produce detailed maps of the bathymetry and derived parameters such as slope and rugosity, - Classify the seabed into areas of hard and soft substrate, and, - Produce seabed habitat maps (or seascapes). Key outcomes from the surveys include: 1. Improved understanding of the seabed of Darwin Harbour. The main seabed geomorphic features identified in Darwin Harbour include banks, ridges, plains and scarps, and a deep central channel that divides into smaller and shallower channels. Acoustically hard substrates are found mostly on banks and are associated with rocky reef and sponge gardens, and are often overlain by a thin veneer of sandy sediment. In contrast, plains and channels are characterised by acoustically soft substrates and are associated with fine sediments (mud and sand). 2. Classification of physical seabed properties to produce a Seascape Map for Darwin Harbour. Six seascape classes (potential habitats) were derived using an Iterative Self Organising (ISO) unsupervised classification scheme. These six classes are related to statistically unique combinations of seabed substrate, relief, bedform and presence of sediment veneer (quite often inferred from presence of epibenthic biota).Maintenance and Update Frequency: asNeededStatement: Data collection was completed in two stages comprising a multibeam survey, undertaken on the MV Matthew Flinders in 2011 by DLRMs predecessor, the Department of Natural Resources, Environment, the Arts and Sport (NRETAS), GA, AIMS and the Darwin Port Corporation; and, a seabed sampling survey undertaken in 2013 on the MV John Hickman, by DLRM and GA. Data acquired from the surveys included continuous high-resolution multibeam sonar bathymetry and acoustic backscatter, video and still camera observations of seabed habitats and biological communities, and physical samples of seabed sediments.&rft.creator=Siwabessy, P.J.W. &rft.creator=Tran, M. &rft.creator=Huang, Z. &rft.creator=Nichol, S.L. &rft.creator=Atkinson, I. &rft.date=2015&rft.coverage=westlimit=130.68649; southlimit=-12.58923; eastlimit=130.94742; northlimit=-12.3187&rft.coverage=westlimit=130.68649; southlimit=-12.58923; eastlimit=130.94742; northlimit=-12.3187&rft_rights= http://creativecommons.org/licenses/by/4.0/&rft_rights=http://i.creativecommons.org/l/by/4.0/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 4.0 International License&rft_rights=http://creativecommons.org/international/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=Cite data as: Siwabessy, PJW, Tran M, Huang Z, Nichol SL, Atkinson I (2015). Mapping and classification of Darwin Harbour seabed. Geoscience Australia. Data accessed at http://metadata.imas.utas.edu.au/geonetwork/srv/en/metadata.show?uuid=f4878405-a569-0030-e044-00144fdd4fa6 on (access date).&rft_rights=This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of Geoscience Australia (GA) for the purposes of the Seamap Australia collaborative project (testing a national marine benthic habitat classification scheme).&rft_rights=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=marine&rft_subject=mapping&rft_subject=bathymetry&rft_subject=backscatter&rft_subject=marine environmental baselines&rft_subject=BATHYMETRY&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=BATHYMETRY/SEAFLOOR TOPOGRAPHY&rft_subject=EARTH SCIENCE | OCEANS | BATHYMETRY/SEAFLOOR TOPOGRAPHY | BATHYMETRY | COASTAL BATHYMETRY&rft_subject=SEAFLOOR TOPOGRAPHY&rft_subject=Marine Geoscience&rft_subject=EARTH SCIENCES&rft_subject=GEOLOGY&rft_subject=Environmental Sciences not elsewhere classified&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=OTHER ENVIRONMENTAL SCIENCES&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Geomorphology and Regolith and Landscape Evolution&rft_subject=PHYSICAL GEOGRAPHY AND ENVIRONMENTAL GEOSCIENCE&rft_subject=research vessel&rft_subject=Benthic habitat&rft_subject=Comments&rft_subject=Multibeam profiling sonar&rft.type=dataset&rft.language=English Access the data

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License Text

Cite data as: Siwabessy, PJW, Tran M, Huang Z, Nichol SL, Atkinson I (2015). Mapping and classification of Darwin Harbour seabed. Geoscience Australia. Data accessed at http://metadata.imas.utas.edu.au/geonetwork/srv/en/metadata.show?uuid=f4878405-a569-0030-e044-00144fdd4fa6 on (access date).

This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of Geoscience Australia (GA) for the purposes of the Seamap Australia collaborative project (testing a national marine benthic habitat classification scheme).

Access:

Open

Contact Information

sales@ga.gov.au

Brief description

This data presents the results of seabed mapping and habitat classification surveys completed in Darwin Harbour during 2011 and 2013 as part of the Northern Territory Government's marine habitat mapping program. This research is a collaboration between Geoscience Australia (GA), the Australian Institute of Marine Science (AIMS), the Department of Land Resource Management (DLRM) and the Darwin Port Corporation. Key objectives are to:
- Produce detailed maps of the bathymetry and derived parameters such as slope and rugosity,
- Classify the seabed into areas of hard and soft substrate, and,
- Produce seabed habitat maps (or seascapes).

Key outcomes from the surveys include:
1. Improved understanding of the seabed of Darwin Harbour. The main seabed geomorphic features identified in Darwin Harbour include banks, ridges, plains and scarps, and a deep central channel that divides into smaller and shallower channels. Acoustically hard substrates are found mostly on banks and are associated with rocky reef and sponge gardens, and are often overlain by a thin veneer of sandy sediment. In contrast, plains and channels are characterised by acoustically soft substrates and are associated with fine sediments (mud and sand).
2. Classification of physical seabed properties to produce a Seascape Map for Darwin Harbour. Six seascape classes (potential habitats) were derived using an Iterative Self Organising (ISO) unsupervised classification scheme. These six classes are related to statistically unique combinations of seabed substrate, relief, bedform and presence of sediment veneer (quite often inferred from presence of epibenthic biota).

Lineage

Maintenance and Update Frequency: asNeeded
Statement: Data collection was completed in two stages comprising a multibeam survey, undertaken on the MV Matthew Flinders in 2011 by DLRMs predecessor, the Department of Natural Resources, Environment, the Arts and Sport (NRETAS), GA, AIMS and the Darwin Port Corporation; and, a seabed sampling survey undertaken in 2013 on the MV John Hickman, by DLRM and GA. Data acquired from the surveys included continuous high-resolution multibeam sonar bathymetry and acoustic backscatter, video and still camera observations of seabed habitats and biological communities, and physical samples of seabed sediments.

Created: 2015

Data time period: 2011-01-01 to 2013-12-31

This dataset is part of a larger collection

130.94742,-12.3187 130.94742,-12.58923 130.68649,-12.58923 130.68649,-12.3187 130.94742,-12.3187

130.816955,-12.453965

text: westlimit=130.68649; southlimit=-12.58923; eastlimit=130.94742; northlimit=-12.3187

Other Information
(ALTERNATE DATA ACCESS - Original Darwin Harbour seabed mapping, high resoultion [direct download 172MB])

uri : https://data.imas.utas.edu.au/attachments/4d77a881-6295-4dc0-8e1a-0f1657d7c4d8/darwin_seascape.zip

(REPORT - Final project report [direct download])

uri : https://d28rz98at9flks.cloudfront.net/79212/Rec2015_018.pdf

(Original metadata record [GA Catalogue])

uri : http://www.ga.gov.au/metadata-gateway/metadata/record/79212/

global : 4739e4b0-4dba-4ec5-b658-02c09f27ab9a

Identifiers
  • global : f4878405-a569-0030-e044-00144fdd4fa6