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Event and decadal-scale modeling of barrier island restoration designs for decision support

December 31, 2019

An interdisciplinary project team was convened to develop a modeling framework that simulates the potential impacts of storms and sea level-rise to habitat availability at Breton Island, Louisiana (Breton) for existing conditions and potential future restoration designs. The model framework was iteratively developed through evaluation of model results at multiple checkpoints. A methodology was developed for characterizing regional wave and water levels, and the numerical model XBeach was used to simulate the potential impacts from a wide range of storm events. Simulations quantified the potential for erosion, overwash, and inundation of the pre- and post-restoration beach and dune system and were used as a preliminary screening of restoration designs. The model framework also incorporated a computationally efficient method to evaluate the impacts of storms, long-term shoreline changes, and relative sea level rise over a 15-year time period in order to evaluate the effect of the preferred restoration alternative on habitat distribution. Results directly informed engineering design decisions and expedited later project stages including the construction permitting process.

Citation Information

Publication Year 2020
Title Event and decadal-scale modeling of barrier island restoration designs for decision support
DOI
Authors Joseph W. Long, P. Soupy Dalyander, Michael Poff, Brian Spears, Brett Borne, David M. Thompson, Rangley C. Mickey, Steve Dartez, Gregory Gandy
Publication Type Article
Publication Subtype Journal Article
Series Title Shore & Beach
Series Number
Index ID 70209255
Record Source USGS Publications Warehouse
USGS Organization St. Petersburg Coastal and Marine Science Center