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Abstract
This is a polygon file, one of five within the Rockhampton Regional Council coastline, which buffers the coastline by 4 km inland. This extent was use to clip the storm tide inundation extents and to visualise each of the five distinct inundation zones. This use of this data should be carried out with the knowledge of the contained metadata and with reference to the associated report provided by Geoscience Australia with this data (Reforming Planning Processes Trial: Rockhampton 2050). A copy of this report is available from the the Geoscience Australia website (http://www.ga.gov.au/sales) or the Geoscience Australia sales office (sales@ga.gov.au, 1800 800 173).
Product Type
dataset
eCat Id
77331
Contact for the resource
Custodian
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GIS Dataset
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2013-08-21T00:00:00
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Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This is a 4 km landward buffer of the storm tide inundation points provided by the University of Western Australia. The five buffers cover the extent of the Rockhapton Regional Council coastline and are divided, 1 through 5, into areas that contained points of similar average return interval inundation heights. Extract from the report below. See the full report for figures full text. The storm tide data was sourced from the National Storm Tide Database which, at the time of this study, was being developed by the University of Western Australia as part of the Haigh et al., (2012) study for the ACE CRC. The aim of this study was to estimate present day extreme total water level exceedance probabilities for Australia's coastline. The extreme water level considered was a combination of MSL, astronomical tide and storm surge generated by both extra-tropical and tropical storm events. The modelling did not include the effects of wave setup or run-up and due to the coarse modelling grid, 10 km, the resulting ARI water heights are suited to the application at the open coast and not within estuaries (Haigh, pers comm.). The hydrodynamic model was forced with global tidal model and global meteorological fields with validation against 30 tide gauges with long records. The nearest validation gauges to Rockhampton were Mackay and Bundaberg each being in the order of 300 km to the north and south respectively of Rockhampton. The model results consist of points adjacent to the coastline (231 in the LGA and 45 in the study area) with attributes at each point defining storm tide water level heights (MSL + tide + surge) for ARIs from 0.1 through to 10 000 years. Data was provided for extra tropical and tropical storm events. The points on the Rockhampton Regional Council LGA coastline are shown in Figure 65. Cluster analysis Due to the number of storm-tide data points off the Rockhampton Regional Council coastline, and the difficulty in analysing and visualising 45 inundation depths for the study area, cluster analysis was carried out to identify statistically similar regions. This resulted in five areas being identified within the Rockhampton Regional Council LGA with two areas being within the study area: Area 4 and Area 5 (Figure 65). Area 4 and 5 are referred to as Area A and B respectively within the storm tide summary section (p20). Via visual inspection of the storm tide data, five clusters were identified. Further analysis of the data via a scatter plot matrix (ObjectID vs ARI water level heights) confirmed clusters of water level heights for broadly every 100 km of coastline. The scatterplot matrix is shown in Figure 66 for the extra-tropical 250 year ARI inundation results. Figure 67 shows the tropical cyclone storm tide 250 year ARI inundation points. Within areas four and five the mean water level height for the ARI50, ARI100, ARI250, ARI1000 and ARI10 000) events were used to identify the inundation extent on a high resolution (LiDAR derived) DEM. The LiDAR surveys were: - Gladstone, acquired 12/6/2009 to 3/7/2009 - Capricorn South, acquired 8/9/2009 to 19/10/2009 - Sunwater, acquired 6/10/2008 to 14/10/2008 Each of these three DEMs has a horizontal resolution of 1 m and a vertical accuracy of 0.15 m with a 67% confidence interval.
Parent Information
Extents
[-23.6055, -23.3546, 150.7516, 150.961]
Reference System
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