Longshore transport gradients and erosion processes along the Ilha Comprida (Brazil) beach system

Silva, Filipe Galiforni; Sousa, Paulo Henrique Gomes de Oliveira; Siegle, Eduardo

doi:10.1007/s10236-016-0956-9

Cited by 12 publications

(19 citation statements)

References 24 publications

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“…() and Silva et al . (). The present analysis at another point, closer to the study area, confirms the bimodal pattern of the mean wave regime at both the annual (Figures A and B) and seasonal scales, except for the autumn, where only the S‐SSW wave approach direction was significant.…”

Section: Discussionmentioning

confidence: 97%

“…The net annual northeastward longshore drift, with a lower southwestward drift in the summer and spring, was obtained after wave propagation for Comprida Island (Silva et al, ). A similar drift pattern is assumed to correspond to the study area, because the northern end of the island is included in the study area.…”

Section: Discussionmentioning

confidence: 97%

“…The annual histograms included all the data, while the data for the seasonal histograms were obtained according to the meteorological seasons (Trenberth, ). Moreover, directional wave histograms were created for the extreme wave regime that included wave heights greater than 2 m (Silva et al ., ). Furthermore, to determine the frequency of each wave approach direction, percentage tables were created relating the significant wave heights and main directions on both the annual and seasonal scales.…”

Section: Methodsmentioning

confidence: 97%

“…Two opposite wave approach directions are predominant in the area: the trade winds generate waves from north and northeast throughout the year, while intense winds associated with the cold fronts are responsible for the higher storm waves from the south (Tessler, ; Nimer, ; Santos, ). Re‐analysis of the 1979–2000 wave data base generated by the WAVEWATCH III (WW3) model confirms this bimodal pattern in the São Paulo Bight: a typical offshore significant wave height (Hs o ) of 1.5 m and peak period (Tp) of 8 seconds are observed throughout most of the year, but higher Hs o and longer Tp occur in autumn and winter due to the entrance of cold fronts from the south (Pianca et al ., ; Silva et al ., ).…”

Section: Study Areamentioning

confidence: 97%

“…Moreover, the wave energy is unevenly distributed along Comprida Island, with the highest values in the northernmost sector, reaching up to 220 W/min. Consequently, shoreline in this sector is highly eroded (Silva et al ., ).…”

Section: Study Areamentioning

confidence: 97%

See 4 more Smart Citations

Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil)

Alcántara‐Carrió

Dinkel

Portz

et al. 2017

Earth Surf Processes Landf

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This study describes the formation of two successive baymouth spits systems on the south‐eastern Brazilian coast and the degradation of the first system. The study area includes the Jureia Beach spit, the deflected Ribeira de Iguape River mouth, the central Iguape sandy headland, the Icapara Inlet of the Mar Pequeno Lagoon and the northern end of the Comprida Island barrier spit. The wave and river flow patterns were combined with the coastline evolution and the alongshore migration rates deduced from satellite images. Initially, both spits showed convergent alongshore migration rates equal to or less than 83 m/yr. However, the extreme river flow due to high rainfall during a very strong El Niño event in 1983 eroded the inland side of the Jureia Beach spit, which finally retreated due to wave erosion. In 1989, a sand bank emerged in the river mouth, which attached to the central headland forming a recurved northeastward spit. In 1994, the high fluvial discharge associated with another very strong El Niño event caused the landward migration of the new spit and emersion of a second sand bank. This second sand bank merged with the Jureia Beach spit in 1997 at an alongshore migration rate of 1795.6 m/yr. Wave erosion of the central headland continued and the attached spit disappeared in 2000. In 2009, the headland erosion merged the river mouth and the Icapara Inlet, which resulted in flanking baymouth spits in a configuration that remains today. Therefore, two models for the formation of baymouth spits have been documented for wave‐dominated microtidal coasts in humid tropical regions with intense fluvial discharge. The convergent longshore migration of the spits is controlled by both the bidirectional longshore drift and the fluvial discharge, the latter eroding the fronting spit, supplying sediments and acting as a hydraulic blockage for longshore drift. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 97%

Section: Study Areamentioning

confidence: 97%

Section: Study Areamentioning

confidence: 97%

See 3 more Smart Citations

Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil)

Alcántara‐Carrió

Dinkel

Portz

et al. 2017

Earth Surf Processes Landf

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Accumulated effects of chronic, acute and man-induced erosion in Nørlev strand on the Danish west coast

2021

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This paper provides an in-depth analysis of the erosion at Nørlev Strand located on the Danish west coast. This location suffers from severe erosion; the result of a combined chronic, acute and, at least partially, man-induced erosion. The analysis is done by studying the average climatic conditions in the vicinity, and the effects of storms. Analysis shows an increase in the measured moderate to large wave events and consequent connection of the erosion problem to climate change. Other effects of climate change such as increase in rainfall were also considered and a surprisingly good correlation was found between coastal erosion in Nørlev and national storm records. Furthermore, a shift in mean wave direction has also been noted in the case of waves coming from the north. The significance that these changes can have in the sediment is assessed quantitatively through numerical modelling.

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Morphological variability of sandy beaches due to variable oceanographic conditions: a study case of oceanic beaches of Rio de Janeiro city (Brazil)

et al. 2021

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Longshore transport gradients and erosion processes along the Ilha Comprida (Brazil) beach system

Cited by 12 publications

References 24 publications

Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil)

Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil)

Accumulated effects of chronic, acute and man-induced erosion in Nørlev strand on the Danish west coast

Morphological variability of sandy beaches due to variable oceanographic conditions: a study case of oceanic beaches of Rio de Janeiro city (Brazil)

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