A model study of tide- and wind-induced mixing in the Columbia River Estuary and plume

MacCready, Parker; Banas, Neil S.; Hickey, Barbara M.; Dever, Edward P.; Liu, Yonggang

doi:10.1016/j.csr.2008.03.015

Cited by 154 publications

(115 citation statements)

References 57 publications

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“…The authors found that the circulation pattern is affected by tide, wind and the presence of freshwater. The need to account for both wind and tidal forces in coastal waters was also demonstrated by MacCready et al (2009) in their study of the Columbia River estuary (USA). The attention to Mediterranean lagoons is confirmed by the analysis of Umgiesser et al (2014) where a comparison study between 10 Mediterranean lagoons has been carried out by means of the 3D numerical model.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional numerical simulations on wind- and tide-induced currents: The case of Augusta Harbour (Italy)

Marchis

Freni

Napoli

2014

Computers & Geosciences

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a b s t r a c tThe hydrodynamic circulation in the coastal area of the Augusta Bay (Italy), located in the eastern part of Sicily, is analysed. Due to the heavy contamination generated by the several chemical and petrochemical industries active in the zone, the harbour was declared a Contaminated Site of National Interest. To mitigate the risks connected with the industrial activities located near the harbour, it is important to analyse the hydrodynamic circulation in the coastal area. To perform such analysis, a parallel 3D numerical model is used to solve the Reynolds-averaged momentum and mass balance, employing the k-ε turbulence model for the Reynolds stresses. The numerical model is parallelized using the programing technology -Message Passing Interface (MPI) and applying the domain decomposition procedure.The Augusta Bay circulation is mainly due to the relative contribution of the wind force acting over the free surface and the tidal motion through the mouths. Due to the geometric complexity of the domain and the presence of several piers along the coast, a curvilinear boundary-fitted computational grid was used, where cells corresponding to land areas or to wharfs were excluded from the computation. Comparisons between numerical results and field measurements were performed. Three different simulations were performed to selectively isolate the effect of each force, wind and tide, acting in the considered domain. The current in the basin was successfully estimated on the basis of the numerical results, demonstrating the specific role of wind and tidal oscillation in the hydrodynamic circulation inside the harbour.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional numerical simulations on wind- and tide-induced currents: The case of Augusta Harbour (Italy)

Marchis

Freni

Napoli

2014

Computers & Geosciences

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“…Surface fluxes of momentum and heat are calculated in ROMS using bulk formulations (Fairall et al 1996a, b). Net shortwave radiation and downward longwave radiation are given as external forcing, and then upward longwave, sensible, and latent heat fluxes are calculated in the model (MacCready et al 2009). For this study, hindcast simulations were conducted for 11 years (1995 -2005) with the first year used as a spinup period.…”

Section: Model Configurationsmentioning

confidence: 99%

Modeling Offshore Freshwater Dispersal from the Changjiang River and Controlling Factors During Summer

Moon¹,

Hirose²,

Pang³

et al. 2012

Terr. Atmos. Ocean. Sci.

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In this study we examine offshore transport and dispersal pathways of the freshwater discharge from the Changjiang River in the East China Sea (ECS), using a regional ECS model. Comparison between the results for 1996 and 1998 clearly shows that the summer monsoon winds play a significant role in spreading the freshwater discharge offshore and determining the dispersal of freshwater in the ECS. Analysis of 10-year simulation demonstrates that a northeastward freshwater transport to Jeju Island across the northwestern shelf of the ECS dominates during the summer period due to the surface Ekman flow by the southeasterly along-shore wind. Meanwhile, there is virtually no relationship between the amount of the summer discharge and the freshwater pathway toward Jeju Island. Our analysis also suggests that when the summer wind is relatively weak, another freshwater pathway toward the central ECS appears with the ambient along-shelf current between the Taiwan Strait and the Korea Strait.

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“…Different factor effects at different location where tidal pressure is the physical factor affecting the estuary. While, wind or tides shows significant impact on far field plume depending on the season and the strength of the wind [19].…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of Pahang River plume

Taher

Lihan²,

Mustapha³

2013

AIP Conference Proceedings

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Abstract. Large rivers transported high amount of discharge towards the sea and induced the river plume formation. The contents of the plume consist of suspended solids, nutrients, pollutants and other particles. Productivity at estuary depends on the organic and nutrient contents from the river discharge. Due to many possible factors, the dispersal of the plume shows spatial variation horizontally and vertically. The monsoonal wind is a factor that effecting plume vertical profile pattern. This study determines the vertical distribution pattern of the plumeat Pahang River through field observation. Several water parameters were measured during cruises conducted at respective monsoon. Data collected includes depth, chlorophyll-a, salinity, temperature and suspended particulate matter. Depth at Pahang's offshore usually does not reached more than 15 m depth because of the shallow continental shelf at South China Sea. The plume has higher concentration at the mouth of the river which causes the area to be less saline and it decreases as the station furthers from the river. Chlorophyll-a is distributed mainly at the surface level where the area is warmer and received freshwater runoff. Suspended particulate matter shows downward distribution from the front of the estuary towards deep water column depth (10 m). Temperature pattern shows warmer surface layer with depth less than 5 m while deeper water column has lower temperature. Vertical profile pattern of Pahang River plume generally shows slight difference between each monsoon by referring to particular parameter.

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A model study of tide- and wind-induced mixing in the Columbia River Estuary and plume

Cited by 154 publications

References 57 publications

Three-dimensional numerical simulations on wind- and tide-induced currents: The case of Augusta Harbour (Italy)

Three-dimensional numerical simulations on wind- and tide-induced currents: The case of Augusta Harbour (Italy)

Modeling Offshore Freshwater Dispersal from the Changjiang River and Controlling Factors During Summer

Vertical distribution of Pahang River plume

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