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Topographic insights in the Frome-Callabonna system and the elevation of a newly surveyed highstand shoreline

Lookup NU author(s): Professor Zhenhong Li

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Abstract

© 2022 Royal Society of South Australia. 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.

Publication metadata

Author(s): Cohen TJ, Mogensen L, Arnold LJ, Li Z, Jansen JD, May J-H

Publication type: Article

Publication status: Published

Journal: Transactions of the Royal Society of South Australia

Year: 2022

Volume: 146

Issue: 1

Pages: 90-108

Online publication date: 14/02/2022

Acceptance date: 31/01/2022

ISSN (print): 0372-1426

ISSN (electronic): 2204-0293

Publisher: Taylor and Francis

URL: https://doi.org/10.1080/03721426.2022.2037200

DOI: 10.1080/03721426.2022.2037200

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