The study analyzes the dune erosion and breaching occurred on the northern Outer Banks of North Carolina in September 2003 during Hurricane Isabel. LIDAR mapping of topography collected by USGS is used to establish pre- and post- storm profiles. Isabel made landfall near the USACE Field Research Facility (FRF) at Duck, North Carolina, where high quality wave and water level measurements are available. With the use of the hydrodynamics data, the bathymetric and topography data have been analyzed to examine the degree and alongshore variability of the dune retreat and breaching as a function of the pre-storm beach and dune characteristics. In addition, the data will be used to calibrate and verify the numerical model CSHORE (Kobayashi et al., 2007) to predict the dune erosion and overwash for obliquely incident waves with longshore currents.
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