Quantifying nearshore morphological recovery time scales using argus video imaging: Palm Beach, Sydney and Duck, North Carolina

Title

Quantifying nearshore morphological recovery time scales using argus video imaging: Palm Beach, Sydney and Duck, North Carolina

 Author

Ranasinghe, R.W.M.R.J.B.
Holman, R.
De Schipper, M.A.
Lippmann, T.
Wehof, J.
Duong, T.M.
Roelvink, D.
Stive, M.J.F.

Faculty

Civil Engineering and Geosciences

 Department

Hydraulic Engineering

 Date

2012-07-01

 Abstract

Time scales of post-storm nearshore morphological recovery and physical processes governing these time scales are poorly understood at present. The ability to predict nearshore morphological recovery time scales based on pre-, during- or post-resetting storm conditions is an essential requirement for building and validating scale aggregated models that operate at macro- and higher spatio-temporal scales. In this study, quality controlled ARGUS video derived beach states at Palm Beach, Sydney (4 years) and Duck, NC (2 years) and concurrent wave data are analysed to quantify the nearshore morphological recovery time scales (Tmr) and to determine the physical processes that may govern Tmr. The results show that Tmr is of the order of 5-10 days at these two beaches. Tmr is moderately positively correlated with the averaged longshore current over the 3 days immediately after the resetting storm, indicating that it might be possible to develop a predictor for Tmr based on wave conditions immediately after the resetting storm. Weak correlations are present between Tmr and several pre-storm, during-storm and post-storm parameters at the two sites. However, these correlations are inconsistent between the two sites. A thorough analysis employing long-term beach state and wave data at several different study sites is required to fully understand this phenomenon.

 Subject

morphological resets
storm impact
recovery time scales
ARGUS

 To reference this document use:

http://resolver.tudelft.nl/uuid:92d7f658-cd49-46b0-8c90-9b830e708455

 Publisher

Coastal Engineering Research Council

 ISSN

2156-1028

 Source

ICCE 2012: Proceedings of the 33rd International Conference on Coastal Engineering, Santander, Spain, 1-6 July 2012

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) 2012 The Author(s)
Creative Commons BY
Files
PDF Ranasinghe_2012.pdf 178.58 KB
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