Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/12931
Title: Tidal elevations and currents at Ponce de Leon Inlet, Florida
Authors: United States. Army. Corps of Engineers. Jacksonville District
Hemsley, J. Michael (James Michael), 1944-
Briggs, Michael Jeffrey
Keywords: Currents
Tides
Publisher: Coastal Engineering Research Center (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; CERC-88-8.
Description: Miscellaneous paper
Tidal elevation and current data were measured and analyzed at Ponce de Leon Inlet for use in calibrating model studies that will evaluate alternative improvements to the weir jetty system. Data were successfully obtained from four of six Sea Data TDR-2 pressure sensors and 14 Endeco 174 current meters during the period September to November 1983. Quality of the data was excellent with very few spikes or missing points. Hardware-related problems occurred on the TDR for Gage T7 due to flooding. Two of the Endeco gages at sta 2B lost their impellors due to high sediment and current flows and/or fishing activity in the inlet throat. (Tidal harmonic analysis of 56 days of National Ocean Survey (NOS) tide data, using Coastal Engineering Research Center's software, verified the accuracy of the program and provided a reference for tidal elevation and current harmonic analysis results. The root mean square (rms) error was 0.11 ft. Constituent amplitudes and local epochs for 10 constituents agreed quite well with NOS'S data for the full calendar year of 1974 from Daytona Beach Pier using 37 constituents. Pressure and surface elevation time series and harmonic analysis plots are presented for tidal elevation data collected in Ranges 3 through 6. Mean water depths ranged from 5.46 to 23.00 ft. The maximum tidal range was 3.5 ft at Range 4. The harmonic analysis results were very good for Ranges 3 and 4 with rms errors of 0.07 and 0.08 ft, respectively. For Ranges 5 and 6, the rms errors were higher at 0.35 and 0,28, respectively, but still very good. For the tidal current data, current roses, vector (stick) plots, current velocity magnitude time-series, current direction time-series, and harmonic analysis plots are presented. The maximum velocity recorded was 3.0 ft/sec at Range 3 for flood flow and 4.6 ft/sec at Range 2 for ebb flow. In general, these values are consistent with those reported earlier. Temperature data were remarkably consistent between TDR and Endeco gages, showing the same general trends. The range of temperatures was approximately 22.5" to 28.5OC.
Rights: Approved for public release; distribution is unlimited.
URI: http://hdl.handle.net/11681/12931
Appears in Collections:Miscellaneous Paper

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