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https://hdl.handle.net/2440/134629
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Type: | Journal article |
Title: | Topographic insights in the Frome-Callabonna system and the elevation of a newly surveyed highstand shoreline |
Author: | Cohen, T.J. Mogensen, L. Arnold, L.J. Li, Z. Jansen, J.D. May, J.H. |
Citation: | Transactions of the Royal Society of South Australia, 2022; 146(1):90-108 |
Publisher: | Taylor & Francis |
Issue Date: | 2022 |
ISSN: | 0372-1426 2204-0293 |
Statement of Responsibility: | Tim J. Cohen, Laura Mogensen, Lee J. Arnold, Zhenhong Li, John D. Jansen, and Jan-Hendrik May |
Abstract: | Lakes Frome, Callabonna, Blanche and Gregory are playa lakes on the eastern and northern sides of the Flinders Ranges, South Australia. Between 2007 and 2019 we surveyed key topographic features of the lakes, including shorelines, lake floors and the alluvial sills that separate the lakes with differential GPS (DGPS). We combine these observations with the analysis of a hybrid DEM that blends data from multiple sources. The lowest elevation of the Frome-Callabonna system based on the hybrid DEM is −8.33 m Australian Height Datum (AHD) at Lake Callabonna but −5.42 m AHD based on DGPS field data. Both values are considerably lower than previous estimates based on spot heights and contours. The DGPS data for Lake Callabonna support the Shuttle Radar Terrestrial Mission (SRTM) estimates of lake-floor elevations but with a mean difference of 1.7 m in elevation. There are larger differences in elevation between the hybrid DEM and the DGPS data for the floor of Lake Frome (mean difference of 4.25 m). We also report on a newly topographically surveyed high shoreline at Lake Callabonna between 20.1 and 20.8 m AHD, the highest to date. |
Keywords: | Playa lake; digital elevation model; DEM; Lake Callabonna; Lake Frome; shoreline |
Description: | Published online: 14 Feb 2022 |
Rights: | © 2022 Royal Society of South Australia |
DOI: | 10.1080/03721426.2022.2037200 |
Grant ID: | http://purl.org/au-research/grants/arc/CE170100015 http://purl.org/au-research/grants/arc/FT180100524 http://purl.org/au-research/grants/arc/FT130100195 |
Published version: | http://dx.doi.org/10.1080/03721426.2022.2037200 |
Appears in Collections: | Geology & Geophysics publications |
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