Advanced Search  |  
 

Rockhampton future climate (2100) sea-level rise (5.0 m AHD)

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.


Dataset citation

ANZLIC unique identifier: ANZCW0703017008

Title: Rockhampton future climate (2100) sea-level rise (5.0 m AHD)


Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia


Description

Abstract:

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). The wind hazard outputs are a series of rasters, one for each average recurrence interval considered, presenting peak wind hazard (peak from all directions) as measure in km/h. This file identifies the extent of inundation from sea-level rise combined with Highest Astronomical Tide (HAT) which is 3.9 m AHD. The name of the file indicates the scneraio water height, e.g. p3p9_LGAClip indicates the inundation shown is for 3.9 m above AHD and that the file has been clipped by the Local Government Area (LGA) to remove the offshore inundation identified.

ANZLIC search words:

  • HAZARDS Flood

Spatial domain:

locality map

Geographic extent name: FITZROY (S) - QLD-FITZROY (S) - Local Government Areas (LGA) - Queensland

Geographic extent polygon: 150.115 -21.9698, 151.0629 -21.9698, 151.0629 -23.7197, 150.115 -23.7197, 150.115 -21.9698,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:
North bounding latitude: -21.9698 °
South bounding latitude: -23.7197 °
East bounding longitude: 151.0629 °
West bounding longitude: 150.115 °

Data currency

Beginning date: Not Known

Ending date: Not Known


Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Access

Stored data format:
DIGITAL - gdb ArcGIS file geodatabase ArcGIS
Available format type:
DIGITAL - gdb ArcGIS file geodatabase ArcGIS

Access constraints:

? Commonwealth of Australia (Geoscience Australia) 2013

With the exception of the Commonwealth Coat of Arms and where otherwise noted, all material

in this publication is provided under a Creative Commons Attribution 3.0 Australia Licence (http://www.creativecommons.org/licenses/by/3.0/au/)

Geoscience Australia has tried to make the information in this product as accurate as possible. However, it does not guarantee that the information is totally accurate or complete. Therefore, you should not solely rely on this information when making a commercial decision.

Free Data Download

Data quality

Lineage:

Below is an augmented extract of the method identified within the technical report.

The sea-level rise analysis was completed through the addition of sea-level rise heights to the 2012 Highest Astronomical Tide (HAT: 3.9 m) value at Rockhampton . HAT is defined by the Australian Hydrographic Service as ??The highest level of water which can be predicted to occur under any combination of astronomical conditions? .

The four sea level rise scenarios are:

? + 0.3 m (QLD 2050)

? + 0.5 m (QLD 2070)

? + 0.8 m (QLD 2100)

? + 1.1 m (FED 2100)

The three Queensland scenarios (2050, 2070 and 2100) are identified within the Queensland Coastal Plan . The Federal scenario (+1.1 m by 2100) was identified by CSIRO from the Intergovernmental Panel on Climate Change?s 4th Assessment Report and subsequent research . This 1.1 m scenario considers the ?high-end? risk including the effects of warming trends on ice sheet dynamics.

Spatial analysis

Utilising the high resolution, 1 m by 1 m raster, Digital Elevation Model (DEM) spatial queries were completed to identify bare earth elevation values that were equal to or less than the scenario value. In the example of the QLD 2050 scenario the elevation is identified where it is equal to or less than 4.2 m (3.9 m (HAT) + 0.3 m) above the Australian Height Datum (AHD).

The extraction method, through several Python scripts, included:

1. Identify the peak water level and extract the tiles that contained this value or less than this value. All remaining inundation datasets were then extracted from this subset to save processing tiles that were not relevant.

2. Process each DEM tile dataset and extract the elevation cells equal to or less than the mean ARI storm tide height being considered from the relevant tile collection (as in point 1).

3. Convert the result of the query raster tiles to polygons

4. For each water height append all tiles together (now being polygons)

The resulting extents were then clipped by the QLD LGA file, to remove offshore inundation. As the inundation extent is occurs over the period of the tidal cycle further inland inundation is expected as compared with a much faster moving event such as a tropical cyclone and the related storm tide. The SLR inundation extent may well be an overestimate and specifically where the inundation identified is isolated from the main body of water this is likely to be an artefact of the 'bath tub' method where all elevation values less than the scneario height are identified.

Positional accuracy:

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. The extents were then clipped by the QLD LGA file, to remove offshore inundation. As the inundation extent is occurs over the period of the tidal cycle further inland inundation is expected as compared with a much faster moving event such as a tropical cyclone and the related storm tide. The SLR inundation extent may well be an overestimate and specifically where the inundation identified is isolated from the main body of water this is likely to be an artefact of the 'bath tub' method where all elevation values less than the scneario height are identified.

Attribute accuracy:

Not applicable.

Logical Consistency:

Not applicable.

Completeness:

Not applicable.


Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address: sales@ga.gov.au

Metadata information

Metadata date: 2013-05-28


Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703017008.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703017008.xml

(p5p0_LGAClip)

Authors:Dunsmore, R. Moore, D.
SPATIAL INFORMATION FOR THE NATION