Beach Fill Performance at the Lido Beach, Florida, Groinby 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,
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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