| Title: |
Beach response to Australian East Coast Lows: a comparison between the 2007 and 2015 events, Narrabeen-Collaroy Beach |
| Authors: |
Harley, MD; Turner, IL; Splinter, KD; Phillips, M; Simmons, JS; Simmons, Joshua |
| Source: |
urn:ISSN:1551-5036 ; Journal of Coastal Research: an international forum for the littoral sciences, 1, SI 75, 388-392 |
| Publisher Information: |
Coastal Education and Research Foundation (CERF) |
| Publication Year: |
2016 |
| Collection: |
UNSW Sydney (The University of New South Wales): UNSWorks |
| Subject Terms: |
37 Earth Sciences; 3709 Physical Geography and Environmental Geoscience; 40 Engineering; anzsrc-for: 37 Earth Sciences; anzsrc-for: 3709 Physical Geography and Environmental Geoscience; anzsrc-for: 40 Engineering; anzsrc-for: 04 Earth Sciences; anzsrc-for: 09 Engineering |
| Description: |
East Coast Lows (ECLs) are intense extratropical cyclones that form off the east Australian coastline and are known to cause significant beach erosion. This study presents analysis of the beach response to two severe ECLs that occurred in the Sydney region in June 2007 and April 2015 based on a three-dimensional coastal monitoring program undertaken at Narrabeen-Collaroy Beach. The results indicate considerable reductions in the subaerial sand volume for both storms, with an average (maximum) reduction of 78 m3 (124 m3) per alongshore meter for the 2007 event and 58 m3 (104 m3) per alongshore meter for the 2015 event. The overwhelming majority (93%) of subaerial beach erosion for both storms was observed to be within the berm section of the beach profile. Further analysis into the alongshore variability of cross-shore beach response reveals that the enhanced erosion during the 2007 event was mainly concentrated in the mid to northern sections of the embayment. It was found that this enhanced erosion was predominantly a result of a greater berm volume in this section of the embayment prior to storm arrival and that berm response to these two events was very similar (R2 = 0.81) when considering erosion as a percentage of the pre-storm berm volume. It is concluded that the berm reduction as a percentage of the pre-storm berm volume can potentially provide a suitable predictor for the beach response to severe ECLs within littoral cells along this coastline. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| Relation: |
http://purl.org/au-research/grants/arc/DP150101339; https://hdl.handle.net/1959.4/unsworks_38485 |
| DOI: |
10.2112/SI75-078.1 |
| Availability: |
https://hdl.handle.net/1959.4/unsworks_38485; https://doi.org/10.2112/SI75-078.1 |
| Rights: |
metadata only access ; http://purl.org/coar/access_right/c_14cb ; CC-BY-NC-ND ; https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Accession Number: |
edsbas.FB26EB78 |
| Database: |
BASE |