Sensitivity of Storm Response to Antecedent Topography in the XBeach Model

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Publication of "Sensitivity of Storm Response to Antecedent Topography in the XBeach Model" in the Journal of Marine Science and Engineering: Beach-Dune System Morphodynamics Special Issue.

This work introduces the use of the parameterized island Gaussian fit (PIGF) model as a tool for characterizing barrier island profiles as well as a tool for generating idealized profiles based on those derived characteristics. These profiles were used to assess the sensitivity of morphological response in the numerical model XBeach under the same hydrodynamic conditions to determine model uncertainty. This research was done as part of an effort to assess how uncertainty in one model could propagate throughout a coupled model framework; it also established methods that could be applied to a national scale for development of an operational product that predicts magnitudes of morphologic change for approaching storms. Data were derived from LiDAR at Dauphin Island, Alabama.

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Date published: October 16, 2020

Idealized Antecedent Topography Sensitivity Study: Initial Baseline and Modified Profiles Modeled with XBeach

Antecedent topography is an important aspect of coastal morphology when studying and forecasting coastal change hazards. The uncertainty in morphologic response of storm-impact models and their use in short-term hazard forecasting and decadal forecasting is important to account for when considering a coupled model framework. Mickey and others (2020) provided a methodology to investigate uncer...