A case study of sediment transport in the Paranagua Estuary Complex in Brazil

Mayerle, Roberto; Narayanan, Rangaswami; Etri, Talal; Wahab, Ahmad Khairi Abd

doi:10.1016/j.oceaneng.2015.06.025

Cited by 19 publications

(9 citation statements)

References 10 publications

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“…Another path of fine-grained sediments may be the transport under hyperpycnal flows. Modeled distribution of suspended sediment concentration at the mouth of Paranaguá bay is higher at bottom layers than is at the top layer, suggesting more effective transport near the seabed (Mayerle et al 2015). In the present study, it was found a relatively extensive area of fine sediments distributed on the shoreface, including shallow regions near the base of the surf zone.…”

Section: Discussionsupporting

confidence: 47%

Surficial sediments of the Paraná Inner Continental Shelf, Southern Brazil

Sielski

Ângulo

Souza

et al. 2017

ABEQUA

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This study examines surficial sediment distribution patterns, slope and morphological characteristics of the Paraná inner continental shelf. Paraná inner continental shelf is located on the southern Brazilian continental shelf, a wide and low gradient shelf, in the vicinity of two large unfilled estuaries and the Serra do Mar mountain range. It is characterized as a wave/storm dominated continental shelf with microtidal, semidiurnal regime and a small supply of recent continental sediments. We analyzed grainsize parameters and sediment composition of 875 grab samples and investigated the inner continental shelf morphology and slope through a digital bathymetric model built from regional nautical charts. We combined and evaluated the characteristics of grain-size curves, the spatial distribution of sediments, and the morphology and slope of the inner continental shelf to identify different sedimentary facies. Sediment distribution patterns change from the coast seaward and between three defined sectors along the coastline: south, central and north inner continental shelf. This variation seems to be related to recent sediment sources and to the presence of deposits from ancient coastal plain and inner continental shelf environments formed before the last Holocene sea-level highstand. Sediments with mean diameter of fine to very fine sands prevail at all depths. Deposits of sediments with mean diameter of silt and medium to coarse sands are significant in particular areas, generally associated with steep slopes, troughs, and sand ridges. Possible causes of sedimentary patchiness are the outcropping of medium to coarse sand and the supply of recent estuarine muddy sediments provided by large estuarine complexes to the Paraná inner continental shelf. The results obtained contribute to the knowledge about the sediment dynamics of Paraná inner continental shelf.

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Section: Discussionsupporting

confidence: 47%

Surficial sediments of the Paraná Inner Continental Shelf, Southern Brazil

Sielski

Ângulo

Souza

et al. 2017

ABEQUA

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“…Potentially harmful products such as petroleum and by-products, fertilizers, minerals, and grains are massive handled in the harbor areas. Furthermore, the channel that connects the shallow continental shelf and the inner estuary requires dredging in order to maintain navigable depth for vessels (Mayerle et al 2015). As consequence, the assessment of organic and inorganic contaminants has been constantly required as part of monitoring and conservation programs.…”

Section: Introductionmentioning

confidence: 99%

Statistical assessment of background levels for metal contamination from a subtropical estuarine system in the SW Atlantic (Paranaguá Estuarine System, Brazil)

Angeli

Kim

Paladino

et al. 2020

J. Sediment. Environ.

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Trace metal background levels determination is essential for the proper assessment of the contamination status of a region. This study aims to integrate geochemical and statistical methods for the reliable determination of background levels, applying it to the sediments of the Paranaguá Estuarine System (PES), a large subtropical estuarine system of international importance since it is considered a World Heritage Site and Biosphere Reserve and it harbors the main South American grain shipping port. Prediction Interval (PI) was applied as a chemometric tool to evaluate metal enrichment without a reference level and assess a regional background. Moreover, the sources and concentrations of major and trace elements were assessed in surface sediments from 135 sampling sites located in the Paranaguá Estuarine System (PES). PES surface sediment elements concentrations may be considered lower than those found in other anthropized environments indicating no significant contamination for most of the studied elements (Cr, Cu, Ni, Pb and Zn). The levels of As in the PES may be related to the geochemical characteristics of the adjacent drainage basin and the occurrence of phosphate rocks, which contain As in their composition. However, As was also influenced by anthropogenic inputs either from agricultural activities or fertilizer industries working with mining phosphate in the region. KeywordsMajor and trace elements • World Heritage Listed area • Background levels • Chemometric tool

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“…Estudos prévios que enfocaram a circulação hidrodinâmica do CEP são limitados, podendo ser destacados o de: Mayerle et al (2015), que usaram um modelo tridimensional para estudar o transporte de sedimentos coesivos baseado no sistema de modelagem Delft3D -os resultados obtidos pelo modelo foram comparados com dados medidos de concentração de sedimentos em suspensão, mostrando satisfatória concordância; e o de Mantovanelli et al (2004), que caracterizaram a circulação e a dinâmica do sedimento em suspensão durante as estações chuvosas (verão) e secas (inverno) a partir de medições realizadas em uma seção próxima ao Porto de Paranaguá, mostrando que a maré é o principal forçante da circulação, seguida do aporte de água doce, e que o CEP muda a sua condição de estratificação: nas quadraturas de verão, apresenta-se altamente estratificado, passando a parcialmente misturado nas sizígias de verão e bem misturado durante as sizígias de inverno. É mostrada ainda a circulação residual induzida pela assimetria da onda de maré, causando diferenças nos tempos de enchente e vazante.…”

Section: Metodologiaunclassified

Determinação das taxas de renovação das águas no complexo estuarino de Paranaguá

Dalazen

Cunha

Almeida

2020

Eng. Sanit. Ambient.

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RESUMO Este trabalho investiga a renovação das águas no Complexo Estuarino de Paranaguá (CEP), localizado no estado do Paraná, Brasil, usando o sistema de modelagem computacional SisBaHiA®. Um modelo de circulação hidrodinâmica, para a definição dos padrões de circulação, e um modelo de transporte Euleriano, para calcular a taxa de renovação (TR), idade da água (IA) e escoamento residual, foram implementados. A TR, a IA e o escoamento residual foram determinados para diferentes cenários hidrodinâmicos, com períodos representativos de verão e de inverno e, consequentemente, com diferentes forçantes (maré, vazão ou vento) com o objetivo de identificar as possíveis áreas de estagnação. Os resultados obtidos mostram que a maré e as vazões fluviais são os forçantes de maior importância na renovação das águas do CEP. Em todos os cenários foram identificadas duas possíveis áreas de estagnação, que apresentam menores TRs e maior IA, quando comparadas com outras regiões, a saber, a região da baía dos Pinheiros e a região próxima à cidade de Paranaguá. Durante o verão e considerando todos os forçantes, as TRs na região da baía dos Pinheiros e na região próxima à cidade de Paranaguá são menores que 95%, enquanto nas demais regiões do CEP os valores são superiores a 95%.

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A case study of sediment transport in the Paranagua Estuary Complex in Brazil

Cited by 19 publications

References 10 publications

Surficial sediments of the Paraná Inner Continental Shelf, Southern Brazil

Surficial sediments of the Paraná Inner Continental Shelf, Southern Brazil

Statistical assessment of background levels for metal contamination from a subtropical estuarine system in the SW Atlantic (Paranaguá Estuarine System, Brazil)

Determinação das taxas de renovação das águas no complexo estuarino de Paranaguá

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