Shoreline erosion due to extreme storms and sea level rise

Dean, Robert G. (1983) Shoreline erosion due to extreme storms and sea level rise. Gainesville, FL, Coastal and Oceanographic Engineering Department, University of Florida, (UFL/COEL, 83/007)

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Abstract

A summary is presented of research conducted on beach erosion associated with extreme storms and sea level rise. These results were developed by the author and graduate students under sponsorship of the University of Delaware Sea Grant Program. Various shoreline response problems of engineering interest are examined. The basis for the approach is a monotonic equilibrium profile of the form h = Ax2 /3 in which h is water depth at a distance x from the shoreline and A is a scale parameter depending primarily on sediment characteristics and secondarily on wave characteristics. This form is shown to be consistent with uniform wave energy dissipation per unit volume. The dependency of A on sediment size is quantified through laboratory and field data. Quasi-static beach response is examined to represent the effect of sea level rise. Cases considered include natural and seawalled profiles. To represent response to storms of realistic durations, a model is proposed in which the offshore transport is proportional to the "excess" energy dissipation per unit volume. The single rate constant in this model was evaluated based on large scale wave tank tests and confirmed with Hurricane Eloise pre- and post-storm surveys. It is shown that most hurricanes only cause 10% to 25% of the erosion potential associated with the peak storm tide and wave conditions. Additional applications include profile response employing a fairly realistic breaking model in which longshore bars are formed and long-term (500 years) Monte Carlo simulation including the contributions due to sea level rise and random storm occurrences. (PDF has 67 pages.)

Item Type: Monograph or Serial Issue
Title: Shoreline erosion due to extreme storms and sea level rise
Personal Creator/Author:
CreatorsEmail
Dean, Robert G.
Series Name: UFL/COEL
Number: 83/007
Date: 1983
Publisher: Coastal and Oceanographic Engineering Department, University of Florida
Place of Publication: Gainesville, FL
Issuing Agency: Oceanographic Engineering Program, Department of Civil and Coastal Engineering, University of Florida
Uncontrolled Keywords: Beach erosion; Storms; Sea level rise; Modeling
Subjects: Atmospheric Sciences
Oceanography
Item ID: 1473
Depositing User: Stephanie Haas
Date Deposited: 28 Sep 2008 13:18
Last Modified: 29 Sep 2011 20:31
URI: http://aquaticcommons.org/id/eprint/1473

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