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Update to the tidal data in VDatum for eastern Florida, Georgia, and South Carolina
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Update to the tidal data in VDatum for eastern Florida, Georgia, and South Carolina
  • Description:
    The tidal component of VDatum for east Florida, Georgia, and South Carolina has been updated to include tidal datum values derived from the most recent water level observations. Also, additional coastline detail has been introduced to allow the incorporation of all tide stations in the region, including many in the uppermost portions of rivers and streams that were not previously in VDatum. Other improvements include modified non-tidal areas and the use of the EEZ for the outer boundary of the region. This third revision of the area features higher resolution of the marine grid (spacing of 0.001 deg in both directions), covers the shelf out to 75 nm (up from the previous 25 nm), and an altered boundary near the North Carolina VDatum region (which was also revised). Multiple unstructured grids were added to the original hydrodynamic model grid mesh to cover the rivers, but no additional model runs were carried out. Instead, datum fields were extrapolated over the new grid cells, and later corrected using the TCARI method. Revised uncertainty values were calculated using both the direct comparison between observed values and hydrodynamic-modeled values, and in the case of additional grids, a jackknifing procedure. [ (]
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