Published May 28, 2021
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DRT is a CIRP-developed tool to rapidly simulate dune volume changes in response to waves and wind.  DRT includes a simplified dune profile erosion model based on Palmsten and Holman, 2012, which estimates dune volume loss as a function of wave contact with the dune during storm events.  In addition DRT incorporates an Aeolian Transport Simulation model based on Kawamura (1951) and Delgado-Fernandez (2010), which estimates potential dune volume input as a function of wind speed and dry beach width (fetch). The models incorporate empirical tuning coefficients, which can be varied to generate ensemble predictions, to assess potential uncertainty in results.  Compiled within DRT is a semi-National dune morphology database, making extraction of morphological parameters of interest easy. DRT can be run in a forecast mode, where it couples NOAA Tides, ESTOFS, and WaveWatchIII predictions to estimate total water levels, including wave runup using the Stockdon et al (2006) formulation, with wind forecasts.  DRT can also be run in hindcast mode, using the USACE Wave Information Studies data, and thus used to evaluate different expected storm responses as a function of potential dune design.  DRT is a simplified tool designed to provide Districts with the rapid ability to forecast potential storm impacts and aid in dune design. 

Kate Brodie
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