The present study analyzes the dune erosion and cross-shore beach profile evolution occurred in Outer Banks, North Carolina, in September 2003 during Hurricane Isabel. Several LIDAR (Light Detection And Ranging) profiles before (August 16, 2003) and after Isabel (September 21, 2003) are used to establish the dune erosion above the mean sea level. Twenty-nine survey profiles in the vicinity of the USACE Field Research Facility (FRF) at Duck, North Carolina, are examined to characterize the dune erosion and the cross-shore beach profile change in water depth less than 10 m and also to calibrate and verify the numerical model CSHORE. The model, based on the time-averaged continuity, cross-shore momentum, longshore momentum and energy equations, predicts the cross-shore variations of the free surface elevation, depth-averaged cross-shore and longshore fluid velocity as well as the suspended sand and bedload transport rates per unit of width.
Beach profile evolution and dune erosion due to the impact of hurricane Isabel
TOMASICCHIO, Giuseppe;
2008-01-01
Abstract
The present study analyzes the dune erosion and cross-shore beach profile evolution occurred in Outer Banks, North Carolina, in September 2003 during Hurricane Isabel. Several LIDAR (Light Detection And Ranging) profiles before (August 16, 2003) and after Isabel (September 21, 2003) are used to establish the dune erosion above the mean sea level. Twenty-nine survey profiles in the vicinity of the USACE Field Research Facility (FRF) at Duck, North Carolina, are examined to characterize the dune erosion and the cross-shore beach profile change in water depth less than 10 m and also to calibrate and verify the numerical model CSHORE. The model, based on the time-averaged continuity, cross-shore momentum, longshore momentum and energy equations, predicts the cross-shore variations of the free surface elevation, depth-averaged cross-shore and longshore fluid velocity as well as the suspended sand and bedload transport rates per unit of width.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
