Tides and tidal currents in the Pearl River Estuary

Mao, Qingwen; Shi, Ping; Yin, Kedong; Gan, Jianping; Qi, Yiquan

doi:10.1016/j.csr.2004.06.008

Cited by 251 publications

(126 citation statements)

References 8 publications

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“…A distorçãoé causada pela interação não linear dos principais constituintes harmônicos de maré eḿ aguas rasas, gerando novos harmônicos de maré com freqüên-cias maiores além de assimetrias de fase e na forma da maré (Speer & Aubrey, 1985;Parker, 1991;George, 1995;Truccolo, 2005). O tempo de assimetria desenvolvida entre a subida e a descida da onda de maré pode ser representado pelo crescimento não-linear dos principais constituintes harmônicos da maré astronômica, podendo ser observado empiricamente através de registros de nível daágua ao longo de estuários (Truccolo & Schettini, 1999;Mao et al, 2004).…”

Section: Introductionunclassified

Oscilação do nível de água e a co-oscilação da maré astronômica no baixo estuário do rio Paraíba do Sul, RJ

Nicolite¹,

Truccolo²,

Schettini³

et al. 2009

Rev. Bras. Geof.

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ABSTRACT. The water level in the lower Paraíba do Sul river estuary was assessed in order to evaluate the effects of the astronomical tide co-oscillation, river discharge and meteorological events. Water level data was recorded hourly from October 2000 until February 2003 at a gauge station nearby the estuarine inlet. The water level is controlled mainly by the astronomical tide co-oscillation during periods of low river discharge, and eventually by meteorological tides. Even during periods of higher river discharge the water level is controlled by astronomical co-oscillation, although during low tide phase the river discharge effects are observable. During periods of extreme high discharge the low frequency water level is mainly driven by the river inflow. The tidal wave was mostly symmetrical during the low river discharge periods, and asymmetries were observed during meteorological events, with shorter flood and longer ebbs. Although, such effects were not corroborated by astronomical tidal constituents M 2 and M 4 relationship, which suggests ebb dominance. Stronger distortions were observed during high discharge periods, with tide attenuation either at neap as in spring tide periods. During these periods the asymmetries were corroborated by M 2 and M 4 relationship.Keywords: tidal asymmetry, meteorological tides, river discharge. RESUMO.A variabilidade do nível daágua no baixo estuário do rio Paraíba do Sul foi estudada para avaliar os efeitos da co-oscilação da maré astronômica, descarga fluvial e de eventos meteorológicos. Dados de nível daágua foram registrados em intervalos horários para o período entre outubro de 2000 até fevereiro de 2003 em uma estação localizada próximoà desembocadura do estuário. Foi observado que durante os eventos de descarga fluvial baixa os níveis deágua do estuário oscilam principalmente em função da co-oscilação da maré astronômica e eventualmente por marés meteorológicas. Durante períodos de descarga fluvial alta o nível daágua de preamar no baixo estuárioé dominado pela co-oscilação, enquanto que nas baixa-maresé influenciado pela descarga fluvial. Em períodos de descarga fluvial muito alta o estuário passa a receber a influência tanto da descarga fluvial quanto da maré astronômica nas oscilações do nível. Em períodos de baixa descarga quase não houve modificação na onda de maré, sendo observada pequena assimetria no sentido de vazante. Ainda em baixa descarga, eventos de maré meteorológica produzem distorções e assimetrias, com o tempo de subida menor que o de descida, gerando correntes mais fortes no sentido de enchente. Contudo, isto não pôde ser confirmado com a relação de fase entre M 2 e M 4 , que sugeriu domínio de vazante. A descarga fluvial alta causou fortes distorções na onda de maré em períodos de quadratura e uma atenuação considerável nas amplitudes tanto de sizígia como de quadratura, com assimetrias no sentido de vazante corroboradas pela relação de fase entre M 2 e M 4 .Palavras-chave: assimetria de maré, marés meteorológicas, descarga fluvial.

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Section: Introductionunclassified

Oscilação do nível de água e a co-oscilação da maré astronômica no baixo estuário do rio Paraíba do Sul, RJ

Nicolite¹,

Truccolo²,

Schettini³

et al. 2009

Rev. Bras. Geof.

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“…The flood current moves approximately in a south-north direction with quite different velocities in the parts of shoal and trough. The average tidal range was small in the offshore waters and increases gradually towards the estuary, reaching a maximum in the upstream of the PRE (Mao et al, 2004). Wave heights are usually less than 0.2 m within the inner estuary, but up to 2.5 m during the typhoons season (Huang, 2000).…”

Section: Regional Settingmentioning

confidence: 99%

Sedimentary development of the Pearl River Estuary based on seismic stratigraphy

Tang

Zhou

Endler

et al. 2010

Journal of Marine Systems

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“…They are also influenced by the geometry and bottom topography, river discharge and meteorological factors (Mao et al, 2004). The currents are rectilinear current, which is about perpendicular to the tube tank.…”

Section: The Accumulation Process Of Immersed Tube Tank Of Hmz Bridgementioning

confidence: 99%

“…The tides in the Lingdingyan mainly come from the Pacific oceanic tidal propagation through the Luzon Strait (Ye and Preiffer, 1990;Mao et al, 2004) with a mean tidal range between 1.0 and 1.7m.…”

Section: The Accumulation Process Of Immersed Tube Tank Of Hmz Bridgementioning

confidence: 99%

Three-Dimensional Numerical Model for Simulating the Accumulation Process of Immersed Tube Tank of HMZ Bridge

Wang

Geng

Lü

2011

Int. Conf. Coastal. Eng.

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In this paper, the development and implementation of a three-dimensional, numerical sediment transport model, which is based on staggered C-unstructured grids in the horizontal direction and Z-level grids in the vertical direction, is delineated. The three dimensional model is discretized by semi-implicit finite volume method, in that the free-surface and vertical diffusion are semi-implicit, thereby removing stability limitations associated with the surface gravity wave and vertical diffusion terms. The remaining terms in the momentum equations are discretized explicitly by integral method. The model is closed physically and mathematically using the Mellor and Yamada level-2.5 turbulent closure submodel. The numerical model is used for simulation accumulation process of immersed tube tank of HMZ (Hong Kong-Macau-Zhuhai) bridge. The model is calibrated and its performance extensively assessed against on-site experiment.

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Tides and tidal currents in the Pearl River Estuary

Cited by 251 publications

References 8 publications

Oscilação do nível de água e a co-oscilação da maré astronômica no baixo estuário do rio Paraíba do Sul, RJ

Oscilação do nível de água e a co-oscilação da maré astronômica no baixo estuário do rio Paraíba do Sul, RJ

Sedimentary development of the Pearl River Estuary based on seismic stratigraphy

Three-Dimensional Numerical Model for Simulating the Accumulation Process of Immersed Tube Tank of HMZ Bridge

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