Transport Prediction in Partially Stratified Tidal Water

Wang, John D.; Blumberg, Alan F.; Butler, H. Lee; Hamilton, Pat B.

doi:10.1061/(asce)0733-9429(1990)116:3(380)

Cited by 12 publications

(4 citation statements)

References 26 publications

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“…Therefore, the model is expected to be a useful tool for water quality modeling and water resources management of the modeled region. The paper attempts to rectify the lack of information on constructing open boundary conditions for hydrodynamic models (Wang et al 1990) and statistical evaluation of model performance (ASCE Task Committee 1988) in most of the published papers and reports.…”

Section: Discussionmentioning

confidence: 99%

“…At present, there is no uniform practice in specifying necessary and sufficient boundary conditions for hydrodynamic models. Therefore, the ASCE Task Committee (Wang et al 1990) suggested that all ''boundary conditions be accurately stated with their associated assumptions. '' In this section, boundary conditions and model forcing functions for the simulation periods of October 1988 to September 1989 and October 1994 to September 1995 are presented.…”

Section: Model Forcing Functionsmentioning

confidence: 99%

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Three-Dimensional Hydrodynamic Model of New York Harbor Region

1999

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Three-dimensional simulations of estuarine circulation in the New York Harbor complex, Long Island Sound, and the New York Bight have been conducted using the Estuarine, Coastal and Ocean Model (ECOM) within the framework of a single grid system. The model grid is curvilinear and orthogonal, with resolution from 100 m in rivers to about 50 km in the bight. The model forcing functions consist of (1) meteorological data; (2) water level elevation and temperature and salinity fields along the open boundary; and (3) freshwater inflows from 30 rivers, 110 wastewater treatment plants, and 268 point sources from combined sewer overflows and surface runoffs. Because the goal of this study is to maximize, to the extent possible, the predictive skill of the modeling system, the motivation for and a detailed description of the construction of these boundary forcing functions are presented. Two 12-month periods are considered: (1) October 1988 to September 1989 for model calibration; and (2) October 1994 to September 1995 for model validation. For model calibration, the results are compared with water levels at 14 stations, currents at six stations, and temperature and salinity at 35 stations. Model validation is accomplished using data from an extensive hydrodynamic monitoring program. Mean errors in predicted elevations and currents are less than 10% and 15%, respectively. Correlation coefficients for salinity and temperature are as high as 0.86 and 1.0, respectively. The level of skill shown by these statistical measures suggests that the model is capable of describing the entire spectrum of time scales for the computed quantities, from the semidiurnal to the annual scales.

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Section: Discussionmentioning

confidence: 99%

Section: Model Forcing Functionsmentioning

confidence: 99%

Three-Dimensional Hydrodynamic Model of New York Harbor Region

1999

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“…In a report of the ASCE Task Committee on Transport Prediction in Partially Stratified Tidal Water, Wang et al (1990) addressed the subjects of model calibration and verification, among many other subjects. They recommend that a model be initially calibrated to surface elevations and currents of astronomical tides, followed by calibration of exchange processes and turbulence closures.…”

Section: Introductionmentioning

confidence: 99%

“…Ditmars et al (1987) also recommended testing the validity of an estuarine circulation model against current data as well as tidal height. Wang et al (1990) further emphasized quantitative measures of model performance in comparison with prototype data; however, they did not propose any procedure for carrying out model calibration and verification.…”

Section: Introductionmentioning

confidence: 99%

Procedure to Calibrate and Verify Numerical Models of Estuarine Hydrodynamics

et al. 1999

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In most hydrodynamic models, friction and turbulent diffusion/dispersion coefficients are the important calibration parameters affecting the calculation of surface elevation, velocity and salinity distribution. This paper presents a rational approach to calibrate and verify a hydrodynamic model of partially stratified estuaries. The calibration procedures and verification requirements are demonstrated with the application of a vertical (laterally averaged) two-dimensional model to a branched estuarine river system. The friction coefficient is calibrated and verified with model simulation of barotropic flow, and the turbulent diffusion and dispersion coefficients are calibrated through comparison of salinity distributions. The overall model verification is suggested to be achieved with comparisons of Eulerian residual circulation and salinity distribution. In the case of the Tanshui River system, the available prototype current records are too short to calculate slowly varying residual currents. The snapshots of the model-computed and field-measured residual currents are provided to qualitatively agree with theoretical analysis. The overall performance of the model is verified with an additional set of salinity data.

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