Observation of an Estuarine Turbidity Maximum in the Highly Impacted Capibaribe Estuary, Brazil

Schettini, Carlos Augusto França; Paiva, Bárbara Pereira; Batista, Rafael de Andrade Lima; Filho, José Cavalcante de Oliveira; Truccolo, Eliane Cristina

doi:10.1590/s1679-87592016115006402

Cited by 19 publications

(7 citation statements)

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“…The lack of correlation of DDPHs to SPM concentration results from the same cause, i.e., the very low range of SPM variation recorded along the tidal cycle (~10 mg L -1 ). In comparative terms, low SPM concentrations have been reported during the dry season for other tropical estuaries such as that of the Capibaribe, Pernambuco State (Schettini et al, 2016b) and of the Caravelas, Bahia State (Schettini and Miranda, 2010). Together with the very slight freshwater dilution, this supports the hypothesis that much of the SPM in the water column is due to local reworking (erosion, transport and deposition) in the estuarine basin.…”

Section: Resultsmentioning

confidence: 51%

Intratidal variability and transport of petroleum aromatic hydrocarbons in an anthropized tropical estuarine system: the Suape estuary (8.4S 35W)

et al. 2018

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The Suape Estuary encompasses the Suape Industrial Port Complex (SIPC), a major industrial development in Brazil's Northeast region, which, in order to be implanted, caused drastic environmental changes in this system. This study presents the first physical characterization of the Suape estuarine system, focusing on the local hydrodynamics, material transport and its influence on some specific properties. Physical properties were also associated to dissolved dispersed petroleum hydrocarbons (DDPHs). A study was undertaken during a complete semi-diurnal tidal cycle (13 hr), during which water level, water flow, current velocity and direction, water properties (salinity, temperature, suspended particulate matter - SPM -, chlorophyll and dissolved oxygen) were recorded using ADCP and CTD systems. The DDPHs were investigated in surface and bottom waters, by spectrofluorescence, using Carmópolis oil and chrysene as analytical standards. Results showed a well-mixed vertical structure, a semi-diurnal tide regime and a diurnal thermal pattern. There was no statistical difference between DDPH concentrations at surface and bottom, due to the tide acting as an important homogenizer. DDPHs were low and the main contribution seems to be that from SIPC, as the residual transport of DDPHs, chlorophyll and dissolved oxygen, was towards the Massangana estuary. An opposite pattern was observed for salinity and SPM, whose residual transport was towards the lagoon. The results pointed local hydrodynamics as an essential tool for understanding material transport and exchanges among the estuarine segments. A longer time series should be studied in order to obtain more robust conclusions.

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Section: Resultsmentioning

confidence: 51%

Intratidal variability and transport of petroleum aromatic hydrocarbons in an anthropized tropical estuarine system: the Suape estuary (8.4S 35W)

et al. 2018

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“…The main rivers that flow into the continental shelf of Pernambuco are Goiana, Capibaribe, Ipojuca, Sirinhaem, and Una. The discharge of these rivers is determined not only by the regime of coastal rain (Zona da Mata), but also by the semi-arid climate in the Zona do Agreste, where rainfall is considerably lower, which results in relatively low discharges (SCHETTINI et al, 2016b). The integrated annual mean flow is of approximately 120 m 3 /s, with yearly variation responding directly to the pluviometric regime (Table 1; Figure 3D).…”

Section: Study Areamentioning

confidence: 99%

Hydrography and currents on the Pernambuco Continental Shelf

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Schettini

Truccolo

et al. 2017

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The present study presents the seasonal hydrography and currents of the Brazilian Northeast Continental Shelf. The study area is located on the Brazilian tropical coast of the Atlantic Ocean between 7.5 and 9 °S. This continental shelf is narrow (~35 km wide) and shallow, with shelf break lying at a depth of 60 m. Salinity and temperature data were collected monthly by means of hydrographic surveys, conducted across the shelf in a single transect in the central part of the study area, between March 2012 and May 2013. Two further campaigns were also conducted to characterize the winter (August 2013) and the summer (January 2014), covering the whole study area (4,600 km 2 ). Water level and currents were measured using an array of Acoustic Doppler Current Profilers (ADCP) moored at mid-shelf in the central area. Seasonal temperature ranged from 26 °C in September to 29.5 °C in April, with a 2-month lag between the minimum and maximum air temperatures. Salinity did not present a clear seasonal pattern, fluctuating between 36.5 and 37.0 psu throughout the year. The mean temperature and salinity values obtained in the winter and summer campaigns were 26.5 and 27.6 °C and 37.1 and 36.7 psu, respectively. Tropical Water (TW) was predominant, accounting for 95% to 97%, with presence of Coastal Water (CW) limited to the inner part of the shelf. The mean flow velocity values in the water column in winter and summer were 0.11 and 0.06 m/s, respectively, similarly to the seasonal wind regime. Northward currents were observed predominantly in winter, with a short period of inverted southward current. These episodes were related to periods of wind relaxation and presented periodicity of 6-13 days, observed through wavelet analysis. This periodicity may be associated with atmospheric instabilities at higher latitudes. Summer currents were sluggish, when the tides accounted for 75 and 43% of the variance in the cross-and along-shelf current components, respectively. TW is the main water mass in the Pernambuco Continental Shelf (PCS) in summer and winter. Current intensity is weak and without direction in summer and stronger towards the north in winter.Keywords: Water masses; Circulation; Brazilian Northeast Shelf. RESUMOEste trabalho apresenta a descrição sazonal da hidrografia e hidrodinâmica de uma plataforma continental localizada na borda oeste do Atlântico tropical, a área de estudo encontra-se entre as latitudes de 7,5 e 9 °S, possui apenas 35 km de largura e 187 km de extensão, com a quebra de plataforma em 60m de profundidade. A salinidade e temperatura foram coletadas em campanhas hidrográficas mensalmente entre março de 2012 e maio 2013 por meio de transectos na região central da área de estudo. Também, duas campanhas foram realizadas, uma para caracterizar o inverno (Agosto de 2013) e outra o verão (janeiro de 2014) cobrindo toda a área de estudo (4600 km 2 ). O nível da água e correntes também foram coletados com um Perfilado Acústico por efeito Doppler (ADCP) fundeado na região central da área de estudo. A ...

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“…Estas modificações possivelmente aumentariam a velocidade da corrente principal facilitando a deposição de sedimentos de maior granulação, com predominância de areia média para o sistema estuarino. Schettini et al (2016) registraram velocidades de corrente de vazante com máximos de 0,68 m.s-1 para o baixo estuário do rio Capibaribe. Essas velocidades de correntes de maré apresentam competência e capacidade no transporte de sedimentos arenosos médios e grossos (IBAÑEZ; PRAT, 1996), o que poderia ser reflexo da presença deste tipo de sedimento nesta unidade (ver Fig.…”

Section: Figura 4 -Evolução Do Espaço Urbano Da Cidade Do Recife Créunclassified

Evolução sedimentar do estuário do rio Capibaribe (Recife-PE) nos últimos 200 anos e suas relações com a atividade antrópica e processo de urbanização

et al. 2016

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O estudo tem como objetivo descrever a evolução sedimentar no baixo estuário do Rio Capibaribe associando com as modificações antrópicas ocorridas nos últimos 200 anos por meio das análises de 210Pb, granulométricas, MOT e carbonato de cálcio. O testemunho registrou três unidades sedimentares com cara-cterísticas distintas. A primeira (72-158 cm) apresentou característi-cas sedimentares de planície de maré, influenciadas por manguezais com pouca influência das ações antrópicas. A segunda (20-72 cm) registrou o início das construções de melhora-mento do Porto do Recife, com altas porcentagens de sedimentos arenosos e baixas porcentagens de sedimentos finos e MOT. A terceira unidade (0-20 cm) apresentou a influência antrópica no sistema estuarino, com alta deposição de sedimentos finos e MOT possivelmente de origem antrópica. Picos de sedimento finos e MOT foram registrados (4, 16 e 72 cm) reportando provavelmente eventos climáticos associados aos registros de chuvas intensas e cheias ocorridos no Estuário do rio Capibaribe.

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Observation of an Estuarine Turbidity Maximum in the Highly Impacted Capibaribe Estuary, Brazil

Cited by 19 publications

References 25 publications

Intratidal variability and transport of petroleum aromatic hydrocarbons in an anthropized tropical estuarine system: the Suape estuary (8.4S 35W)

Intratidal variability and transport of petroleum aromatic hydrocarbons in an anthropized tropical estuarine system: the Suape estuary (8.4S 35W)

Hydrography and currents on the Pernambuco Continental Shelf

Evolução sedimentar do estuário do rio Capibaribe (Recife-PE) nos últimos 200 anos e suas relações com a atividade antrópica e processo de urbanização

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