An improved bathymetric model for the modern and palaeo Lake Eyre

Leon, J. X. and Cohen, T. J. (2012) An improved bathymetric model for the modern and palaeo Lake Eyre. Geomorphology, 173-174 69-79. doi:10.1016/j.geomorph.2012.05.029


 
Dataset relationships
 
Author Leon, J. X.
Cohen, T. J.
Title An improved bathymetric model for the modern and palaeo Lake Eyre
Journal name Geomorphology   Check publisher's open access policy
ISSN 0169-555X
1872-695X
Publication date 2012-11
Sub-type Article (original research)
DOI 10.1016/j.geomorph.2012.05.029
Volume 173-174
Start page 69
End page 79
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract Here we demonstrate the applicability of using altimetry data and Landsat imagery to provide the most accurate digital elevation model (DEM) of Australia's largest playa lake - Lake Eyre. We demonstrate through the use of geospatial techniques a robust assessment of lake area and volume of recent lake-filling episodes whilst also providing the most accurate estimates of area and volume for larger lake filling episodes that occurred throughout the last glacial cycle. We highlight that at a depth of 25m Lake Mega-Eyre would merge with the adjacent Lake Mega-Frome to form an immense waterbody with a combined area of almost 35,000km 2 and a combined volume of ~520km 3. This would represent a vast water body in what is now the arid interior of the Australian continent. The improved DEM is more reliable from a geomorphological and hydrological perspective and allows a more accurate assessment of water balance under the modern hydrological regime. The results presented using GLAS/ICESat data suggest that earlier historical soundings were correct and the actual lowest topographic point in Australia is -15.6m below sea level. The results also contrast nicely the different basin characteristics of two adjacent lake systems: Lake Eyre and Lake Frome.
Keyword Mega-lake
SRTM
GLAS
LANDSAT
Terrain analysis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 2 June 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Global Change Institute Publications
Official 2013 Collection
 
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