Beach Fill Performance at the Lido Beach, Florida, Groin

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by Clifford L. Truitt, Mote Marine Lab, Sarasota, United States,
Nicholas C. Kraus, Mote Marine Lab, Sarasota, United States,
Don Hayward, Mote Marine Lab, Sarasota, United States,

Document Type: Proceeding Paper

Part of: Beach Nourishment Engineering and Management Considerations:

Abstract: Lido Beach on the Gulf of Mexico in Sarasota, Florida traditionally has been used as a placement area for sand dredged from the adjacent New Pass federal navigation project. At the end of the public beach is a single, relatively short rock groin. This paper examines the two most recent full cycles of shoreline erosion, fill, and adjustment beginning in 1984. In the summer of 1985, 145,000 cu m of fill were placed along a 900 m section of Lido Beach. The performance of the fill is traced over the subsequent 5 years based on surveys and controlled photography. The shoreline returned to pre-project conditions within 3 years and receded even further during a two year funding delay. A second fill placement provided the basis for further analyses using a shoreline change numerical model. The stabilizing benefit of the groin is shown by comparing calculated shoreline positions with and without the structure. A hypothetical extension of the groin would more than double the longevity of the fill with manageable adverse impact to the adjacent beach.

Subject Headings: Beaches | Coastal management | Fills | Groins (structure) | Shoreline | Landfills | Beach nourishment | Erosion | North America | Florida | United States | Gulf of Mexico

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