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Omnibus FY04-06 Research Projects
Omnibus FY02-04 Research Projects

Omnibus FY04-06 Research Projects

Title: Towards Quantifying Coastal Erosion in SC: Offshore Shoals as Sediment Sinks and Controls for Shoreline Change

Investigator(s): Dr. George Voulgaris, University of South Carolina
gvoulgaris@geol.sc.edu

Description: This project will lead to a better understanding of regional sediment dynamics critical for long-term coastal planning and engineering design purposes. Beach replenishment projects, construction of groins, seawalls and other soft and hard coastal engineering structures aimed at restoring recreational beaches require information on coastal dynamics and processes. Prevailing conditions (e.g., tides, currents, and winds) in these areas may be influenced by offshore topography and sediment availability. The objective of this continuing study is to examine the relationship between an offshore shoal in the Myrtle Beach area and coastal erosion dynamics. The goal of this effort is to characterize and quantify the potential for the shoal to be a sustainable borrow site for this economically important resort community. Specific objectives are to: (1) identify the effect of tidal and wind forcing around the shoal; (2) identify the effect of the shoal in controlling wave propagation and its role in “energetic events” (such as storms); (3) model the propagation of gravity waves for the prediction of wave characteristics; and (4) model coastal circulation over the shoal. During Year 1, two models, SWAN and ROM, have been tested and set up to model circulation over the shoal. Field data have also been collected which will be used to test the models during Year 2 efforts. Results of this effort will be useful to coastal zone managers and the USACOE as they develop and design future nourishment projects that require the use of sand from offshore shoals.

Omnibus FY02-04 Research Projects

Title: Nearshore Impacts of Offshore Dredging for Beach Nourishment

Investigator(s): Dr. Paul Work, Clemson University; Dr. George Voulgaris, University of South Carolina
pwork@ces.clemson.edu; gvoulgaris@geol.sc.edu

Description: This study seeks to examine potential beach-nourishment “borrow” sites. The investigators will identify and characterize beach-nourishment materials in nearshore areas, which could be dredged and pumped onto beaches. Nearshore borrow areas are most favorable from an economic standpoint. The study will include an examination of the relationship between an offshore sand shoal in the Myrtle Beach area and coastal erosion dynamics. The shoal will be characterized and its potential quantified to determine if it can serve as a sustainable “borrow” site for future beach nourishment.

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