Comparison of Observed Estuarine Tide Data with Hydraulic Model Data by Use of Cross-Spectral Density Functions.

by Jan J. Leendertse, David Shiao-Kung Liu

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An analysis of observed tide level data in Jamaica Bay, New York, by use of cross-spectral density functions and similar analyses of tide data measured in a physical model of that bay at the Waterways Experiment Station of the U.S. Army Corps of Engineers in Vicksburg, Mississippi. Conclusions are (1) the tidal amplification and phase lag between two observation series in the prototype or in a hydraulic model can be determined accurately by cross-spectral analysis; (2) the technique can be used effectively for adjusting hydraulic models driven by periodic tides only, and is particularly effective for adjusting models with many branches; and (3) the phase lags and amplification of the semidiurnal tide in the Jamaica Bay model, after adjustments by use of the cross-spectral method, agree well with those obtained from field measurements. 74 pp. Ref.

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