Progress in Surface Water Modeling

Westerink, Joannes J.; Gray, William G.

doi:10.1002/rog.1991.29.s1.210

Cited by 36 publications

(15 citation statements)

References 76 publications

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“…Adoption of a limited-area model was dictated by the need for relatively high spatial resolution inside the model domain and computational constraints imposed by available resources. However, adequate specification of the required open boundary conditions (OBCs) along these boundaries has been, and continues to be, a serious problem (e.g., Westerink and Gray, 1991). Numerous methods have been used to address this problem with varying degrees of success.…”

Section: Problems: Past and Presentmentioning

confidence: 98%

Development of a Real-Time Regional Ocean Forecast System with Application to a Domain off the U.S. East Coast

Breaker¹,

Rao²,

Kelley³

et al. 2004

mar technol soc j

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A B S T R A C TThis paper discusses the needs to establish a capability to provide real-time regional ocean forecasts and the feasibility of producing them on an operational basis. Specifically, the development of a Regional Ocean Forecast System using the Princeton Ocean Model (POM) as a prototype and its application to the East Coast of the U.S. are presented. The ocean forecasts are produced using surface forcing from the Eta model, the operational mesoscale weather prediction model at the National Centers for Environmental Prediction (NCEP). At present, the ocean forecast model, called the East Coast-Regional Ocean Forecast System (EC-ROFS) includes assimilation of sea surface temperatures from in situ and satellite data and sea surface height anomalies from satellite altimeters. Examples of forecast products, their evaluation, problems that arose during the development of the system, and solutions to some of those problems are also discussed. Even though work is still in progress to improve the performance of EC-ROFS, it became clear that the forecast products which are generated can be used by marine forecasters if allowances for known model deficiencies are taken into account. The EC-ROFS became fully operational at NCEP in March 2002, and is the first forecast system of its type to become operational in the civil sector of the United States.

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Section: Problems: Past and Presentmentioning

confidence: 98%

Development of a Real-Time Regional Ocean Forecast System with Application to a Domain off the U.S. East Coast

Breaker¹,

Rao²,

Kelley³

et al. 2004

mar technol soc j

View full text Add to dashboard Cite

show abstract

“…The development of better implicit solution techniques and the avoidance of spurious solutions through introduction of non-linear triangular elements gave a new stimulus to using finite elements for practical applications (see e.g. Gray and Lynch 1977;1979;Westerink and Gray, 1991).…”

Section: Numerical Flow Modelling In the (Coastal) Oceanmentioning

confidence: 99%

A unified formulation for the three-dimensional shallow water equations using orthogonal co-ordinates: theory and application

et al. 2005

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In this paper, the formulations of the primitive equations for shallow water flow in various horizontal co-ordinate systems and the associated finite difference grid options used in shallow water flow modelling are reviewed. It is observed that horizontal co-ordinate transformations do not affect the chosen co-ordinate system and representation in the vertical, and are the same for the three-and two-dimensional cases. A systematic derivation of the equations in tensor notation is presented, resulting in a unified formulation for the shallow water equations that covers all orthogonal horizontal grid types of practical interest. This includes spherical curvilinear orthogonal co-ordinate systems on the globe. Computational efficiency can be achieved in a single computer code. Furthermore, a single numerical algorithmic code implementation satisfies. All co-ordinate system specific metrics are determined as part of a computer-aided model grid design, which supports all four orthogonal grid types. Existing intuitive grid design and visual interpretation is conserved by appropriate conformal mappings, which conserve spherical orthogonality in planar representation. A spherical curvilinear co-ordinate solution of wind driven steady channel flow applying a strongly distorted grid is shown to give good agreement with a regular spherical co-ordinate model approach and the solution based on a b-plane approximation. Especially designed spherical curvilinear boundary fitted model grids are shown for typhoon surge propagation in the South China Sea and for ocean-driven flows through Malacca Straits. By using spherical curvilinear grids the number of grid points in these single model grid applications is reduced by a factor of 50-100 in comparison with regular spherical grids that have the same horizontal resolution in the area of interest. The spherical curvilinear approach combines the advantages of the various grid approaches, while the overall computational effort remains acceptable for very large model domains.

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“…In the past decades, many researches have been conducted to study tide currents and simulate tidal flow circulation patterns existent across coastal, shallow estuaries, and other small water bodies (e.g. Lynch, 1983;Westerink and Gray, 1991).…”

Section: Introductionmentioning

confidence: 99%

Skill Assessment of a Coast-Ocean Circulation Model in the U.S. East Coast

Gazerzadeh¹,

Ding²

2016

World Environmental and Water Resources Congress 2016

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In the study, an integrated coastal and ocean process model, CCHE2D-Coast, is validated by assessing the model skills in simulating coast-ocean circulations driven by the astronomical tides in the U.S. Northeast and Mid-Atlantic coast. Through the skill assessment, discrepancies between numerically simulated water surface elevations and observed tidal elevations at NOAA tide gages are quantified. The model skill indices such as the Normalized Root-Mean Square, the Coefficient of Determination, the Scatter Index, and the Bias are calculated from comparisons of the errors. On the other hand, statistical errors of the tidal constituent parameters, amplitudes and phases, are also determined by using a newly-developed parameter identification approach. Good agreement between the model-identified phases and amplitudes of the harmonic constituents with the values provided by NOAA is obtained. The skill assessment results reveal that the model can produce accurate tidal elevations in the regional domain covering the US East Coast.

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Progress in Surface Water Modeling

Cited by 36 publications

References 76 publications

Development of a Real-Time Regional Ocean Forecast System with Application to a Domain off the U.S. East Coast

Development of a Real-Time Regional Ocean Forecast System with Application to a Domain off the U.S. East Coast

A unified formulation for the three-dimensional shallow water equations using orthogonal co-ordinates: theory and application

Skill Assessment of a Coast-Ocean Circulation Model in the U.S. East Coast

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