Product catalogue
Darwin Harbour Habitat Mapping Program: Current velocity (50th and 75th percentile)
This resource contains current velocity grids (50th and 75th percentile) for the greater Darwin Harbour region as part of a baseline seabed mapping program of Darwin Harbour and Bynoe Harbour. This project was funded through offset funds provided by an INPEX-led Ichthys LNG Project to the Northern Territory Government’s Department of Environment and Natural Resources (NTG-DENR) with co-investment from Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS). The intent of this program is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps and information to underpin marine resource management decisions. The current velocity grids (50th and 75th percentile) were derived from a compilation of multiple surveys undertaken by GA, AIMS and NTG-DENR between 2011 and 2017, including GA0333 (Siwabessy et al., 2015), GA0341 (Siwabessy et al., 2015), GA0351/SOL6187 (Siwabessy et al., 2016), GA4452/SOL6432 (Siwabessy et al., 2017), GA0356 (Radke et al., 2017), and GA0358 and GA0359 (Radke et al., 2018), adding to those from previous surveys GA4425 and GA0333 collected by GA, AIMS, NTG-DENR and Darwin Port Authority.
Simple
Identification info
- Date (Creation)
- 2019-02-20
- Date (Publication)
- 2020-01-15T03:32:06
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/127193
Identifier
- Codespace
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Digital Object Identifier
- Cited responsible party
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Role Organisation / Individual Name Details Author Williams, D.
Author Brinkman, R.
- Status
- Completed
- Spatial representation type
Spatial resolution
- Level of detail
-
100m
- Topic category
-
- Geoscientific information
Extent
Temporal extent
- Time period
- 2011 2017
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
-
Administration to complete
- Date
- Edition
-
Administration to complete
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Geoscience Australia
Voice
Resource format
- Title
-
Product data repository: Various Formats
- Website
-
Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Keywords
-
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Hydrodynamic
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- Keywords
-
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Marine Environmental Baselines
-
- Keywords
-
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Marine Survey
-
- Keywords
-
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Exclusive Economic Zone
-
- Keywords
-
-
Published_External
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Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
-
Download the data (esri grid) [8.5 MB]
Download the data (esri grid) [8.5 MB]
- OnLine resource
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Link to collection record
Link to collection record
Resource lineage
- Statement
-
A numerical model of the broader study region was established using the RMA-2 hydrodynamic modelling software to simulate tidal currents and water levels. RMA-2 is a two-dimensional depth averaged finite element hydrodynamic numerical model (King 2016). It computes water surface elevations and horizontal velocity components for subcritical, free-surface two-dimensional flow fields. RMA-2 computes a finite element solution of the Reynolds and Navier-Stokes equations for turbulent flows, solving the depth-integrated equations of fluid mass and momentum conservation in two horizontal directions. Friction is calculated with the Manning’s or Chezy equation, and eddy viscosity coefficients are used to define turbulence characteristics. The underpinning bathymetry for the model grid was derived from a 10 m bathymetric survey grid compiled from both previously reported (e.g. digitised nautical charts) and new survey data. The model was run for a 30 day period to capture a characteristic spring-neap tidal cycle. At each model element, tidal velocities were calculated and analysed to provide maps of tidal velocity percentiles and accompanying percentiles of tidal bed shear stress.
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG/WGS 84 / UTM zone 52S (EPSG:32752)
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/6e6cb8ee-497d-4e4c-8438-ded06775046f
- Title
-
GeoNetwork UUID
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/127193
- Metadata linkage
-
https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/4b73f17b-a020-4c07-ad1b-63ad8640b114
- Metadata linkage
-
https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/6e6cb8ee-497d-4e4c-8438-ded06775046f
- Date info (Creation)
- 2019-02-20T04:51:37
- Date info (Revision)
- 2019-02-20T04:51:37
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3 (Draft Schemas 2015)
- Edition date
- 2015-07-01T00:00:00
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, April 2015