Beach Changes Along Eastern Bogue Banks, North Carolina, Resulting front the 1996 Hurricane Season

Todd S. Roessler, John T. Wells

Abstract


Thirteen permanent beach transects established prior to the 1996 hurricane season were used to evaluate the effects of two hurricanes on erosion and accretion rates along eastern Bogue Banks, North Carolina. Monthly monitoring for nearly two years showed that erosion patterns exhibited considerable variability and were highly influenced by the hurricanes. Whereas severely eroded sections of beach, up to 20.4 m (53.2 m3/m), had not recovered 1.5 yr after the hurricanes, the areas that accreted immediately following the two storms, up to 17.7 m (12.6 m3/m), remained stable. Application of a numerical model, REF/DIF 1 v. 2.51, was used to test the effects of offshore bathymetry on beach response to the hurricanes. Model results showed that predicted gradients in longshore current velocities correlated well with erosion rates during the two storms.

Keywords


Beach erosion; hurricanes; longshore currents.

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