Journal article
An improved bathymetric model for the modern and palaeo Lake Eyre
Geomorphology, Vol.173-174, pp.69-79
2012
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. © 2012 Elsevier B.V.
Details
- Title
- An improved bathymetric model for the modern and palaeo Lake Eyre
- Authors
- Javier X Leon (Author) - University of WollongongT J Cohen (Author) - University of Wollongong
- Publication details
- Geomorphology, Vol.173-174, pp.69-79
- Publisher
- Elsevier BV
- Date published
- 2012
- DOI
- 10.1016/j.geomorph.2012.05.029
- ISSN
- 0169-555X
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Sustainability Research Cluster
- Language
- English
- Record Identifier
- 99450527302621
- Output Type
- Journal article
Metrics
469 Record Views
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- Collaboration types
- Domestic collaboration
- Web Of Science research areas
- Geography, Physical
- Geosciences, Multidisciplinary
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Source: InCites