Abstract
A method is presented to consistently tie future mean sea level rise (MSLR) scenario projections to local geodetic and tidal datums. This extends the U.S. Army Corps of Engineer (USACE) guidance for incorporating the effects of future MSLR into coastal projects. While USACE relies on the National Oceanic and Atmospheric Administration (NOAA) 19-year National Tidal Datum Epoch (NTDE) for its datum relationships,theapproachproposedhereingeneralizesthisguidancebychoosingtheappropriate19-yearepochcenteredonthestartyearofthe MSLR scenario under consideration. The procedure takes into account the local annual sea level variability, which confounds the matching to any given single year while generalizing and preserving the 19-year averaging long used by NOAA to calculate the NTDE. Examples of the MSLR scenario matching procedure are given using actual data and projections for La Jolla, California, and Sewells Point (Hampton Roads), Virginia. DOI: 10.1061/(ASCE)WW.1943-5460.0000145. © 2013 American Society of Civil Engineers. CE Database subject headings: Sea level; Datum; Tidal currents. Author keywords: Sea level; Sea level rise projections; Sea level rise scenarios; Geodetic datums; Tidal datums.
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