Product catalogue
The effects of storm clustering on storm demand and dune recession at Old Bar, NSW.
Old Bar Beach on the NSW mid-coast is an erosion hotspot with chronic dune recession rates exceeding 0.5 m/yr combined with extreme storm demand events upwards of 200 m3/m. With resultant property loss, Old Bar is a focus for active shoreline management by Midcoast Council. Here we demonstrate a new approach to distinguish the erosional effects of individual storms versus clusters of storms. We modelled the observed sediment transport inside the Old Bar coastal compartment and used probabilistic modelling to quantify both shoreline recession and storm demand. The hybrid cross shore (equilibrium type) longshore morphodynamic Shoreline Evolution (EVO) model developed by WBM BMT was setup for the Old Bar coastal compartment. A suite of probabilistic synthetic time series of waves and tides were used to force the model allowing us to make robust statistical assessments of the modelled erosion. In the subsequent analysis, erosion caused by individual storms are merged into “clustered” events if accretionary beach recovery between storms was less than 50 percent.
Modelling results were in line with previous studies indicating continued recessions of 0.5m/yr and 50 year storm demands that exceed 200m3/m. Preliminary analysis of storm clustering suggests that recession and storm demand for clustered events are greater than for individual storms. These findings suggest that traditional “design storm” methods based solely on the most severe individual storm event will underestimate recession and storm demand return periods. Results will aid ongoing management and planning supported by NSW Office of Environment and Heritage and Midcoast Council to better understand the nature of the coastal hazards that continue to place some beachfront properties at risk.
The Old Bar study was undertaken for the Bushfire and Natural Hazards CRC project ‘Resilience to clustered disaster events on the coast - storm surge’.]
Simple
Identification info
- Date (Creation)
- 2018-06-13
- Date (Publication)
- 2020-08-18T03:40:36
- Citation identifier
- ga-dataSetURI/Link to be added by administrator
- Cited responsible party
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Role Organisation / Individual Name Details Author Gravois, U.
Author Baldock, T.
Author Callaghan, D.
Author Davies, G.
Author Nichol, S.
- Status
- Final
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Davies, G.
Spatial Division Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
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Administration to complete
- Date
- Edition
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Administration to complete
- Distributor contact
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Role Organisation / Individual Name Details Distributor Geoscience Australia
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Resource format
- Title
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Product data repository: Various Formats
- Website
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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
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Keywords
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storm clustering
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- Keywords
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storm
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Download the article (pdf) [2.6 MB]
Download the article (pdf) [2.6 MB]
- Distribution format
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pdf
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- OnLine resource
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Link to Resilience to clustered disaster events on the coast - storm surge website
Link to Resilience to clustered disaster events on the coast - storm surge website
- Distribution format
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Resource lineage
- Statement
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Led by University of Queensland (research partners on the BNHCRC project"
- Hierarchy level
- Document
Metadata constraints
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/87a3814a-0baf-4256-9741-7f47a38c969e
- Title
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GeoNetwork UUID
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Davies, G.
Spatial Division Internal Contact
Type of resource
- Resource scope
- Document
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/121362
- Metadata linkage
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https://ecat.ga.gov.au:8080/geonetwork/srv/eng//metadata/add5bc51-dd4d-408c-8c1b-deebaacf6efe
- Metadata linkage
-
https://ecat.ga.gov.au:8080/geonetwork/srv/eng//metadata/87a3814a-0baf-4256-9741-7f47a38c969e
- Date info (Creation)
- 2018-05-04T03:37:56
- Date info (Revision)
- 2018-06-14T05:01:01
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3 (Draft Schemas 2015)
- Edition date
- 2015-07-01T00:00:00
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, April 2015