Longshore transport on the northeastern Brazilian coast and implications to the location of large scale accumulative and erosive zones: An overview

Bittencourt, Achiléa Candida Lisboa; Domínguez, José Maria Landim; Martin, Louis; Silva, Iracema Reimão

doi:10.1016/j.margeo.2005.06.006

Cited by 63 publications

(66 citation statements)

References 17 publications

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“…This period characterizes a passage from a phase of vertical reef accretion to a predominance of lateral growth which was evidenced by C 14 dates of several reef tops along the northeastern coast of Brazil (Barbosa et al 1986, Nolasco and Leão 1986, Dominguez et al 1990, Leão et al 2003, Leão and Kikuchi 2005. Figure 5 shows the long-term regional patterns of sand dispersion along the coastline defined by a numerical modeling of wave climate in the study region (Bittencourt et al 2005). These patterns are expressed by coastal cell drifts (from I to XI, Fig.…”

Section: The Evolution Of Shoreface Reefsmentioning

confidence: 88%

“…In such a situation, these substrates could remain free from the accumulation of sediments, as well as from sediments in transit. In effect, it should be considered that the coastal sections indicated in figure 5 as under erosion or little/no deposition, although in the general computation are locations of sediment deficit, they are seasonally swept, in opposing directions, by sediment in transit by different wave fronts that reach them there (Bittencourt et al 2005). Thus, the reef substrates remained free of a sediment cover and, with the rising of sea level, became more distant from the coastline due to the transgressive sea.…”

Section: Discussionmentioning

confidence: 99%

“…In cell V, in spite of a general tendency for an increase in drift intensity in the downdrift direction, only in the section between Ilhéus and Itacaré there seems to be a correspondence between this gradient and an insipient development of Quaternary coastal accumulations. In the remainder of the coastal section corresponding to cell V, this relationship is not observed, which may be attributed, according to Bittencourt et al (2005), to the influx of sediments carried by the Jequitinhonha River. The same situation may be occurring in the section of cell IX between Miaí and Pirambu due to the presence of the São Francisco River.…”

Section: Sediment Dispersion Patternsmentioning

confidence: 90%

“…The regional sandy sediment dispersion patterns along this coastline are described by Bittencourt et al (2005). In general, these patterns can explain, to a first order approximation, the relationship between the wave climate and the locations of accumulation and erosion or little/no deposition of sediment along the study area.…”

Section: )mentioning

confidence: 99%

“…According to Bittencourt et al (2005), the most significant directions of wave fronts are from: NE, E, SE and SSE with periods of 5 sec. and height of 1.0 m for NE and E directions, and 6.5 sec.…”

Section: Geological-physiographical Scenariomentioning

confidence: 99%

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Deficit of sand in a sediment transport model favors coral reef development in Brazil

Bittencourt¹,

Leão²,

Kikuchi³

et al. 2008

An. Acad. Bras. Ciênc.

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This paper shows that the location of the shoreface bank reefs along the northeastern and eastern coasts of Brazil, in a first order approximation, seem to be controlled by the deficit of sediment in the coastal system. The sediment transport pattern defined by a numerical modeling of wave refraction diagrams, representing circa 2000 km of the northeastern and eastern coasts of Brazil, permitted the regional-scale reproduction of several drift cells of net longshore sediment transport. Those drift cells can reasonably explain the coastal sections that present sediment surplus or sediment deficit, which correspond, respectively, to regions where there is deposition and erosion or little/no deposition of sand. The sediment deficit allows the exposure and maintenance of rocky substrates to be free of sediment, a favorable condition for the fixation and development of coral larvae.

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Section: The Evolution Of Shoreface Reefsmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Sediment Dispersion Patternsmentioning

confidence: 90%

Section: )mentioning

confidence: 99%

Section: Geological-physiographical Scenariomentioning

confidence: 99%

See 3 more Smart Citations

Deficit of sand in a sediment transport model favors coral reef development in Brazil

Bittencourt¹,

Leão²,

Kikuchi³

et al. 2008

An. Acad. Bras. Ciênc.

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Morphologic and sedimentologic patterns of active aeolian dune‐fields on the east coast of Maranhão, northeast Brazil

Hilbert

Guedes

Giannini

2015

Earth Surf Processes Landf

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The eastern portion of the Maranhão coast is characterized by large active dune‐fields located in a tropical setting. This article combines the analysis of dune‐field morphologic patterns with the classical analysis of grain size and heavy minerals to study the sedimentary dynamics of the active aeolian system in this region. Based on the heavy mineral analysis, the main sedimentary suppliers feeding the system are the westward alongshore drift bringing sand from the coast east of the Parnaíba River mouth and the river itself. The absence of well‐defined variation patterns of the two morphometric parameters studied, dune spacing and crest length, reflects complex sedimentary dynamics and transport pathways, inside the aeolian system, despite the unidirectional wind. During the wet season, the interdune plains are flooded and the system is intensely reworked by intermittent drainages. During the dry season, the deposits formed by the drainages and interdune lakes become temporary internal sedimentary sources for the system. Due to this combined aeolian‐fluvial transport, the sediment source area has a planar geometry, with contributions from the beach and interdune plains, and not linear as expected in a typical case of source only in the beach. The areal limits of the dune‐fields is the main boundary condition controlling the dune‐field patterns, as dune spacing and crest length, by changing the sedimentary inflow–outflow balance and interactions between migration dunes. Copyright © 2015 John Wiley & Sons, Ltd.

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The Beaches of Ceará

Pinheiro

Morais

Maia

2016

Coastal Research Library

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Longshore transport on the northeastern Brazilian coast and implications to the location of large scale accumulative and erosive zones: An overview

Cited by 63 publications

References 17 publications

Deficit of sand in a sediment transport model favors coral reef development in Brazil

Deficit of sand in a sediment transport model favors coral reef development in Brazil

Morphologic and sedimentologic patterns of active aeolian dune‐fields on the east coast of Maranhão, northeast Brazil

The Beaches of Ceará

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