首页|Estimates of longshore sediment transport rates along Macumba and Recreio-Barra da Tijuca sandy beaches(Rio de Janeiro,southeastern Brazil)

Estimates of longshore sediment transport rates along Macumba and Recreio-Barra da Tijuca sandy beaches(Rio de Janeiro,southeastern Brazil)

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Due to the complex nature of coastal dynamics,several models were developed to estimate longshore sediment transport(LST)rates.The Coastal Engineering Research Center(CERC),Kamphuis,and Bayram models are among the most used and were applied to three east-west oriented sandy urban beaches from Rio de Janeiro(southeastern Brazil):Macumba,Recreio,and Barra da Tijuca.The wave record from oceanographic buoys and the WaveWatch Ⅲ(WW3)model were used to identify fairweather periods and increased storminess between 2016 and 2018.Eastwards,median sediment grain-size grades from coarse to medium sand,and is associated with decreasing beach slopes in the same direction.The magnitude of the estimated LST rates varied significantly between the models(Δ ≈ 1,000 m3/day,p＜0.001),although the time-averaged LST rates obtained from the four models indicate eastward transport.The four models identified areas of convergence and divergence of sediment transport with increasing rates to the east.The modeling results may support effective coastal management initiatives when integrated with topographic profiles,numerical modeling,satellite imagery,and historical information.

Sediment transport modelsLittoral driftCoastal morphodynamicsTropical beaches

Breylla Campos Carvalho、Josefa Varela Guerra

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Departamento de Oceanografia Geológica,Faculdade de Oceanografia,Universidade do Estado do Rio de Janeiro,Rio de Janeiro,CEP 20550-900,Brazil

Departamento de Ciências do Mar,Insituto do Mar,Uni-versidade Federal de São Paulo,Santos,CEP 11070-100,Brazil

Coordena??o de Aperfei?oamento de Pessoal de Nível Superior-Brasil(CAPES)Ph.D.scholarship(DS)and Doctoral Exchange Program PDSEPh.D.scholarship(DS)and Doctoral Exchange Program PDSE

00188881.132411/206-0119/2016

2024

10.1016/j.ijsrc.2024.03.005

国际泥沙研究(英文版)
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国际泥沙研究(英文版)

影响因子：0.337
ISSN：1001-6279
年,卷(期)：2024.39(3)