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Master's Dissertation
DOI
10.11606/D.21.2011.tde-19042012-150420
Document
Author
Full name
Thiago Marques Coelho
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Harari, Joseph (President)
Fontes, Roberto Fioravanti Carelli
Siegle, Eduardo
Title in Portuguese
Análise do transporte de sedimentos na região central da Baixada Santista (SP) através de modelagem numérica
Keywords in Portuguese
Baixada Santista
Bedload
ROMS
Simula
SWAN
Transporte de sedimentos
Abstract in Portuguese
Este trabalho teve como objetivo analisar o transporte de sedimentos na região central da Baixada Santista (SP) através do uso do modelo numérico ROMS (Regional Ocean Modeling System) acoplado ao modelo numérico SWAN (Simulating WAves Nearshore) em simulações representativas dos meses de agosto de 2009 e janeiro de 2010. Os resultados indicaram haver picos no transporte de sedimentos, principalmente na plataforma continental e na Baía de Santos, durante a passagem de sistemas frontais, chegando a atingir 4,2 kg m2 s1 na região costeira. As menores taxas de concentração de sedimentos em suspensão na coluna d'água ocorreram durante os períodos de quadratura, sem a presença de ventos fortes e incidência de ondas com grande energia. O transporte por carga de fundo encontrado na área costeira de Praia Grande foi predominantemente para sudoeste, em ambos os meses simulados, onde, as maiores taxas de transporte foram observadas no mês de agosto com valores em torno de 1 x 10 kg m2 para o mês. A taxa de sedimentação na região do alto estuário foi da ordem de 1 cm ano1, concordando com os dados disponíveis na literatura. O modelo numérico representou de forma satisfatória os padrões de transporte de sedimentos encontrados na região.
Title in English
Analysis of sediment transport in the central region of Baixada Santista (SP) through numerical modeling
Keywords in English
Baixada Santista
Bedload
Numerical Simulation
ROMS
Sediment transport
SWAN
Abstract in English
This study aimed to analyze the sediment transport in the central region of Baixada Santista (SP) using the numerical model ROMS (Regional Ocean Modeling System) coupled to the numerical model SWAN (Simulating Waves Nearshore) in simulations representing the months of August 2009 and January 2010. The results suggested peaks in sediment transport, especially on the continental shelf and the Bay of Santos, during the passage of frontal systems, achieving values of 4,2 kg m2 s1 nearshore. The lowest rates of concentration of suspended sediment in the water column occurred during periods of neap tides, without the presence of strong winds and incidence of waves with high energy. In both simulated months, the bedload transport found in the coastal area of Praia Grande was predominantly to the southwest, with the highest rates of transport observed in the month of August, with values of 1 x 10 kg m2. The rate of sedimentation in the upper estuary has been on the order of 1 cm year1, in agreement with the data available in the literature. The numerical model represented the transport patterns of sediments found in the region in a satisfactory way.
 
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Publishing Date
2012-08-07
 
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