posted on 2022-03-28, 09:15authored byWilliam Farebrother
Studies have highlighted the need to understand how coastal dunefields evolve over time, to inform their future management. This thesis explores how sand supply can influence the formation and evolution of coastal dunefields through the analysis of LiDAR-derived DEMs. This thesis presents two papers; (1) exploring long-term evolution of NSW coastal dunefields, and (2) exploring the shorter mmigration patterns within the southern Newcastle Bight. Through volumetric analyses, utilising a novel automated dune crest mapping approach, it was found that the Seal Rocks dunefield experienced a decrease in sediment supply during the late Holocene, while Booderee and the Newcastle Bight experienced an increase in supply. We suggest that over the late Holocene, small variations in wave climates supplying sediment to these dunefields may have resulted in this variability; however any such fluctuation cannot be reliably detected from the orientation of the transgressive dunes. Short-term dune migration (2007-2013) within the southern Newcastle Bight was found to be dominated by the SW-NE oriented dunes moving towards the NW, and the NW-SE oriented dunes towards the NE.
History
Table of Contents
Chapter 1. Introduction -- Chapter 2. LiDAR- derived analysis of the evolution of three key NSW coastal dunefields during the Holocene -- Chapter 3. Short-term migration of Southern Newcastle Bight dunefield detected by multi-temporal LiDAR -- Chapter 4. Thesis conclusions and recommendations for further study -- Chapter 5. References -- Chapter 6. Appendices.
Notes
Bibliography: pages 52-57
Empirical thesis.
Awarding Institution
Macquarie University
Degree Type
Thesis MRes
Degree
MRes, Macquarie University, Faculty of Science and Engineering, Department of Environmental Sciences
Department, Centre or School
Department of Environmental Sciences
Year of Award
2016
Principal Supervisor
Paul P. Hesse
Additional Supervisor 1
Ian Goodwin
Rights
Copyright William Farebrother 2016.
Copyright disclaimer: http://mq.edu.au/library/copyright