Utilização de métodos acústicos em estudos de dinâmica costeira: exemplo na desembocadura lagunar de cananéia

Paolo, F. S.; Mahiques, Michel Michaelovich de

doi:10.1590/s0102-261x2008000200008

Cited by 13 publications

(6 citation statements)

References 8 publications

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“…Similar features have been reported in other sub-superficial studies using geophysical acoustics, such as that of the lagoonal mouth at Cananeia (Paolo and Mahiques, 2008) and the bay of Guanabara in Rio de Janeiro (Catanzaro et al, 2004).…”

Section: Sand Dunessupporting

confidence: 88%

Plant Debris Accumulations in the Preto River Subbasin, Itanhaem, Sao Paulo, Brazil: Insights From Geotechnology

Ricardi-Branco¹,

Ianniruberto²,

Silva³

et al. 2011

PALAIOS

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Geophysical methods can be used to identify the frequency and spatial distribution of plant debris, as well as for the study of the development of such accumulations in recent depositional settings. Side-scan sonar and a sub-bottom profiler were used to generate acoustic images of plant macroremains along a 16.9 km stretch of the meandering course of the Preto River in the municipality of Itanhaém, São Paulo, Brazil. Numerous inclined heterolithic stratification (IHS) deposits with plant debris constitute point bars, while sand dunes mark the migration of the channel along the straighter portions of the river. A large concentration of methane gas was found associated with older organic sediments in the river. The acoustically generated results were confirmed by the analysis of cores with all data integrated into the geographic information system (GIS) environment. The present study is one of the first to apply the methods of geotechnology to taphonomic research.

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Section: Sand Dunessupporting

confidence: 88%

Plant Debris Accumulations in the Preto River Subbasin, Itanhaem, Sao Paulo, Brazil: Insights From Geotechnology

Ricardi-Branco¹,

Ianniruberto²,

Silva³

et al. 2011

PALAIOS

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“…The longest distance traveled by salt water in the sea1 domain may be associated with the position of Trapande Bay on the coast. According to Paolo and Mahiques (2008), salt water enters preferentially through this bay, and it flows off more rapidly through the Cananeia Sea. Timing delays observed between high tide and low tide at Barra de Cananeia and Mar Pequeno may be partially related to the estuary shape and its morphology, lowering current speeds by energy dissipation through the bottom and lateral stresses.…”

Section: Surface Circulationmentioning

confidence: 99%

Numerical Modeling as Supporting Tool for Aquaculture of Oysters in a Subtropical Estuarine Ecosystem

et al. 2019

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The Estuarine-Lagoon Complex of Cananeia-Iguape (ELCCI) is a large estuarine system dominated by mangroves, located on the southeast coast of Brazil (25° S, 48° W). Oyster farming is an important economic activity in Cananeia due to the natural abundance of oyster seeds originally found in its mangrove fields. The aim of this study was to describe the hydrodynamic aspects of the mangrove and oyster farming in the ELCCI by analyzing environmental scenarios using numerical simulations. Simulations allowed for the description of the distance of penetration of the salt wedge into the system as well as the direction and magnitude of the tidal currents. Higher values of river discharge corresponded to lower distances of penetration of the salt wedge, a feature which shows that the freshwater discharge and geomorphology together determine the variation in salinity within the estuary. Oysters are cultivated in regions of higher salinity and relatively stable conditions, with low speeds of tidal currents and little vertical variation in salinity. Under average river discharge conditions (450 m 3 .s -1 ), there is a confluence of tidal waves in Mar Pequeno, where velocity is lower. This change may lead to a higher sedimentation at restricted areas and thus to a higher deposition of organic matter derived from oyster cultivations during flood tides. MODELAGEM NUMÉRICA COMO INSTRUMENTO DE APOIO À AQUICULTURA DE OSTRAS EM UM ECOSSISTEMA ESTUARINO SUBTROPICAL RESUMO O Complexo Estuarino Lagunar de Cananeia-Iguape (CELCI) é um grande estuário dominado por sistemas de mangues, os quais são encontrados na costa sudeste do Brasil (25° S, 48° W).A ostreicultura é uma importante atividade econômica em Cananeia devido à abundância natural de sementes de ostras que são encontradas originalmente em seus campos de mangue. O objetivo deste estudo foi descrever os aspectos hidrodinâmicos do mangue e das áreas de cultivo de ostras no CELCI analisando-se cenários ambientais de simulações numéricas. As simulações permitiram a descrição da distância de penetração da cunha salina no sistema, assim como da direção e a magnitude das correntes de maré. Valores mais elevados da descarga dos rios corresponderam a uma menor distância de penetração da cunha salina, mostrando que a descarga de água doce e a geomorfologia juntos determinam a variação na salinidade dentro do estuário. As ostras são cultivadas em regiões de maior salinidade e condições relativamente estáveis, com baixas velocidades das correntes de maré e pouca variação vertical da salinidade. Sob condições de descarga média (450 m 3 .s -1 ), há um encontro de ondas de maré na localidade do Mar Pequeno, onde a velocidade de corrente é menor. Essa mudança pode levar a uma maior sedimentação em áreas restritas e, portanto, a uma maior deposição de matéria orgânica derivada de cultivo de ostra durante a maré enchente.

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“…Several papers can be found using remote sensor to describe bottom composition, bathymetry and marine bottom mapping ( [9], [5], [6], [12], [4], [3], [14], [16], [13]). However, this is the first time that satellite image and sonographic data is correlated in Northeast of Rio Grande do Norte.…”

Section: Introductionmentioning

confidence: 99%

Using side scan sonar in the characterization of the continental shelf: Touros area

Moreira

Vital

Lira

2013

2013 IEEE/OES Acoustics in Underwater Geosciences Symposium

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This paper presents a sonographic mapping of an area of the Brazilian continental shelf adjacent to Touros city-RN, NE Brazil. Data were acquired in lines parallel to the coast line, with a total area of 58 km². The equipment used was Side Scan Sonar 272 -TD, operated both with frequency of 100 kHz. As a result was possible to correlate clearly the sonar data with the satellite image and identify different reflection patterns.

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Utilização de métodos acústicos em estudos de dinâmica costeira: exemplo na desembocadura lagunar de cananéia

Cited by 13 publications

References 8 publications

Plant Debris Accumulations in the Preto River Subbasin, Itanhaem, Sao Paulo, Brazil: Insights From Geotechnology

Plant Debris Accumulations in the Preto River Subbasin, Itanhaem, Sao Paulo, Brazil: Insights From Geotechnology

Numerical Modeling as Supporting Tool for Aquaculture of Oysters in a Subtropical Estuarine Ecosystem

Using side scan sonar in the characterization of the continental shelf: Touros area

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