Abstract

The ArcINFO grid is one of the outputs of a finescale hydrodynamic model, the Simulating WAves Nearshore (SWAN) model (Booij et al., 1999; Ris et al., 1999).The grid describes the modelled maximum orbital velocity (m/s) which can be used as estimation of seabed exposure on the Carnarvon Shelf.
Google map showing geographic bounding box with values North bound -21.49 East bound 114.33 West bound 112.93 South bound -24.13
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please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Product Type/Sub Type

dataset - Marine Data - Bathymetry Grid

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2011

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

Marine Data
Bathymetry Grid
marine
numerical modelling
abiotic surrogates
Marine Geoscience

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-21.49
East bound
114.33
West bound
112.93
South bound
-24.13

Lineage

A finescale hydrodynamic model, the Simulating WAves Nearshore (SWAN) model (Booij et al., 1999; Ris et al., 1999), was developed to estimate seabed disturbance for Carnarvon Shelf. The SWAN model estimates wave propagation using the wave action equation (Hasselmann et al., 1973). The model takes into account refraction of swell waves, plus shoaling, diffraction, dissipation and random waves, but excludes local wave generation by wind. The bathymetry data for the SWAN model was input at 100metre spatial resolution. The model also required three parameters: significant wave height (2 to 4 metres), peak wave period (6 to 14 seconds), and peak wave direction (?p, 220 degree). The model generated five variables (in a plain text file) for each scenario: significant wave height, wave direction, orbital velocity, orbital diameter and maximum orbital velocity. The maximum orbital velocity (unit: m/s) was considered as the best estimate of seabed exposure. The values of maximum orbital velocity were then combined to generate one seabed exposure variable: averaging all 12 scenarios (cs_all_av). This seabed exposure variable was then transformed intoArcINFO grids.

Digital Transfer Options

onLine

DISTRIBUTION Format

ArcGIS-grid

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a529430e-2178-0f20-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2014-02-14

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).