Granitic coastal geomorphology: applying integrated terrestrial and bathymetric LiDAR with multibeam sonar to examine coastal landscape evolution
David M Kennedy, Daniel Ierodiaconou, Alexandre Schimel
Earth Surface Processes and Landforms | WILEY | Published : 2014
Coasts composed of resistant lithologies such as granite are generally highly resistant to erosion. They tend to evolve over multiple sea level cycles with highstands acting to remove subaerially weathered material. This often results in a landscape dominated by plunging cliffs with shore platforms rarely occurring. The long-term evolution of these landforms means that throughout the Quaternary these coasts have been variably exposed to different sea level elevations which means erosion may have been concentrated at different elevations from today. Investigations of the submarine landscape of granitic coasts have however been hindered by an inability to accurately image the nearshore morphol..View full abstract
We thank Parks Victoria for funding the capture of the multibeam sonar data used in this study. We thank members of the crew Sean Blake and Dr Alex Rattray of Deakin University's research vessel Yolla for assistance in the collection of the multibeam sonar data. We also thank Parks Victoria staff at Tidal River for their logistical support and use of their field station at Refuge Cove. We thank the Department of Environment and Primary Industries Department of Environment and Primary Industries coordinated imagery program for access to the georegistered aerial photography and the Future Coasts Program for access to the LiDAR data. We thank Ian Atkinson from Geoscience Australia and Nicole Bergersen from Acoustic Imaging Pty Ltd for technical support provided during MBES data capture and analysis. We thank Dr David Johnson from Metocean Solutions Ltd for providing the hindcast swell data. GIS laboratory facilities at Deakin University, Warrnambool, Victoria were used for spatial analyses. Comments by Jasper Knight and an anonymous reviewer were appreciated.