- Title
- Wave Runup and Setup on Natural Beaches in NSW
- Creator
- Hart, Rosanne M.; Power, Hannah E.
- Relation
- Australasian Coasts and Ports 2021 Conference. Proceedings of the Australasian Coasts and Ports 2021 Conference (Te Pae, Christchurch 11-13 April, 2022) p. 532-538
- Relation
- https://www.coastsandports.org/papers/2021/168_hart_finalpaper.pdf
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2022
- Description
- Natural sandy beaches around the world are facing increasing threats of erosion from wave action. An understanding of how waves behave in the nearshore of beaches, specifically the swash zone is therefore paramount to enable coastal managers to mitigate further damage to these ecological, economic, and socially significant areas. However, the temporally and spatially variable nature of intermediate beaches (which dominate southeast Australia), results in high levels of error when using empirical models to predict runup. There is, therefore, a need to gain a better understanding of swash zone processes on intermediate sandy beaches to better predict water level extremes. This research investigates the relationship between nearshore morphology partitioned into inner and outer swash hydrokinematic regions, and swash statistics of four intermediate beaches on the southeast Australia coastline. The results indicate a positive correlation between both inner and outer swash size (width and vertical extent) and the shoreline setup and 2% runup exceedance level. This indicates that beaches with larger swash zones exhibit greater runup extremes and greater contributions of shoreline setup. The findings of this research highlight the complexities in using simple parameters in empirical runup models and the importance of swash zone morphology on predicting runup extremes. The varying shoreline setup contribution dependent on size of the inner and outer swash zones suggest a scaled approach to estimating shoreline setup when predicting runup extremes on natural beaches which may lead to more accurate runup estimates.
- Subject
- beaches; swash; runup; setup; nearshore; SDG 8; SDG 14; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1496845
- Identifier
- uon:54259
- Identifier
- ISBN:9780473647056
- Language
- eng
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