Produção Nacional
Variabilidade morfológica da praia do Pântano do Sul, ilha de Santa Catarina, Brasil
2008; Sociedade Brasileira de Geologia; Volume: 38; Issue: 3 Linguagem: Inglês
10.25249/0375-7536.2008383566576
ISSN2177-4382
AutoresUlisses Rocha de Oliveira, Rodrigo do Carmo Barletta, Janice Rezende Vieira Peixoto, Norberto Olmiro Horn Filho,
Tópico(s)Coastal and Marine Dynamics
ResumoThis work aims at analyzing some beach morphologic variability profiles which have been measured on Pântano do Sul beach, south of Santa Catarina Island. Three beach profiles have been monitored along the beach from August 2002 to August 2003 in a monthly rate. An extra profile has been measured in order to clarify the presence of megacusps. Wave characteristics in the surf zone have been monitored through visual observation in each profile. The wave regime in deep waters has also been assessed during the beach profile sampling period by using data collected by a directional wave rider buoy placed approximately 35 km from the Santa Catarina Island. The profiles morphological variations have taken place due to four main reasons: (i) the wave average energy variability among the three sectors thus reflecting the exposure level of the various parts of the beach to the incident waves. The more the beach is exposed to the waves action, the more are the variations in its sedimentary stock; (ii) high wave energy, characterized by South-Southeast swells with peak periods above 10 seconds and significant wave height above 4 m in deep waters, condition which erodes the subaereal portion of the beach; (iii) persistent low wave energy, which usually brings on sediment to the beach; (iv) the rhythmic beach morphology itself, which may trigger local variations in the beach face slope as well as in its volume among profiles measured on megacusps crests or on megacusps embayments
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