Next Article in Journal
Bayesian Inference in Snow Avalanche Simulation with r.avaflow
Previous Article in Journal
Previous, Current, and Future Trends in Research into Earthquake Precursors in Geofluids
Open AccessArticle

Tropical Cyclone Impacts on Headland Protected Bay

1
Global-Change Ecology Research Group, School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
2
Noosa Council, Tewantin, QLD 4565, Australia
3
BMT, Brisbane, QLD 4001, Australia
*
Author to whom correspondence should be addressed.
Geosciences 2020, 10(5), 190; https://doi.org/10.3390/geosciences10050190
Received: 17 April 2020 / Revised: 1 May 2020 / Accepted: 15 May 2020 / Published: 19 May 2020
(This article belongs to the Special Issue Coastal Morphodynamics and Geomorphology)
The response of headland protected beaches to storm events is complex and strongly site dependent. In this study, we investigated the response of several headland protected beaches in Noosa, Australia to a tropical cyclone event. Pre and post topographical surveys of all beaches were completed using both pole-mounted RTK-GNSS and structure-from-motion (SfM)-derived elevation models from survey-grade drone imagery to assess sediment volume differentials. Coastal imaging was used to assess shoreline development and identify coastal features while a nearshore wave model (SWAN) was used to project waves into the study site from a regional wave buoy. Obliquely orientated swells drive currents along the headland with sediment being eroded from exposed sites and deposited at a protected site. Elevated sea-levels were shown to be a strong force-multiplier for relatively small significant wave heights, with 10,000 m3 of sediment eroded from a 700 m long beach in 36 h. The SWAN model was adequately calibrated for significant wave height, but refraction of swell around the headland was under-represented by an average of 16.48 degrees. This research has coastal management implications for beaches where development restricts natural shoreline retreat and elevated sea states are likely to become more common. View Full-Text
Keywords: coastal monitoring; cyclone impacts; headland bypassing; RTK drone; SWAN coastal monitoring; cyclone impacts; headland bypassing; RTK drone; SWAN
Show Figures

Figure 1

MDPI and ACS Style

Wishaw, D.; Leon, J.X.; Barnes, M.; Fairweather, H. Tropical Cyclone Impacts on Headland Protected Bay. Geosciences 2020, 10, 190.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop