Estuarine beach evolution in relation to a flood-tide delta

Vila-Concejo, A., Austin, T. P., Harris, D. L., Hughes, M. G., Short, A. D. and Ranasinghe, R. (2011) Estuarine beach evolution in relation to a flood-tide delta. Journal of Coastal Research, 190-194.

Author Vila-Concejo, A.
Austin, T. P.
Harris, D. L.
Hughes, M. G.
Short, A. D.
Ranasinghe, R.
Title Estuarine beach evolution in relation to a flood-tide delta
Journal name Journal of Coastal Research   Check publisher's open access policy
ISSN 0749-0208
1551-5036
Publication date 2011-01-01
Sub-type Article (original research)
Open Access Status Not yet assessed
Start page 190
End page 194
Total pages 5
Place of publication Coconut Creek, United States
Publisher Coastal Education & Research Foundation
Language eng
Formatted abstract
Estuary margins are considered areas of sediment accumulation; however, some contain estuarine low-energy beaches undergoing erosion. A detailed investigation of estuarine processes was undertaken at Port Stephens (SE Australia) beginning March 2007; with the aim of investigating the causes of shoreline erosion occurring on both sides of the entrance over the last 40 years. Measurements included topographic surveys of the shorelines, bathymetric measurements of the outer estuary, hydrodynamic measurements (both bottom mounted and transects) over the flood-tide delta and short term hydrodynamic measurement at the shorelines. Results show that westward transport related to propagation of SE ocean waves into the estuary dominates the overall evolution of the system. Net sediment transport and significant morphological change in the estuary does not appear related to estuarine or tidal circulation. While most of the system is undergoing erosion there are two features that still accumulate sediment, a sandwave located next to the entrance on the northern shoreline and a sand spit associated to a tidal inlet also on the northern shoreline. Sand accumulation in the sandwave is linked to high-energy storms waves while the sand spit traps sediment that cannot bypass the river entrance.
Keyword Low energy beach
Estuarine beach erosion
Sediment transport paths
Low-Energy Beach
Southwestern Australia
Western Australia
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Earth Sciences Publications
 
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