Morphology and Sedimentary Characterization of a Nourishment Project at Navegantes Beach

Along the central North-Coast of Santa Catarina State several beaches present erosion processes. One good example is the Navegantes beach that in the last decade suffered with aggravated beach erosion problems. Facing this reality, this work aimed to understand the governing processes behind the ero...

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Bibliographic Details
Published inJournal of coastal research pp. 869 - 871
Main Authors de Menezes, J. T., Klein, A. H. da F.
Format Journal Article
LanguageEnglish
Published Coastal Education & Research Foundation (CERF) 01.12.2006
Subjects
Arithmetic mean
Beaches
Berms
Coastal engineering
Erosion
Sand
Sediments
Shorelines
Surface areas
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Summary:Along the central North-Coast of Santa Catarina State several beaches present erosion processes. One good example is the Navegantes beach that in the last decade suffered with aggravated beach erosion problems. Facing this reality, this work aimed to understand the governing processes behind the erosional problem by studying the local morphology and sedimentary characteristics, as well as to propose subsidies to an appropriate beach nourishment practice. The analysis of the shoreline variation was negative for the Gravatá beach with an average of 1.5 m/yr in an extension of two kilometers. The sediment of the beach was characterized as fine sand (0.16 mm). The necessary volume for the beach nourishment was calculated for a beach profile with a height of 8 meters between the berm (+2m) and the depth of closure (-6m), and a width estimate the beach after the beach nourishment of 15, 50, 75 and 100 meters. Overfill of 1.2 was used. The necessary volume of sediment for a beach nourishment in the Navegantes beach was calculated in 290,000 m³, 960,000 m³, 1,450,000 m³ and 1,900,000m³ respectively.
ISSN:0749-0208
1551-5036