Northern Section - West Onslow Beach
At the north end of Topsail Island a broad area of erosion is observed. On the
change plot below,
this area shows as an area of bright reds and yellows on the beach adjacent to the remains
of the dune line. The area eroded during Hurricane Bonnie is clearly seen as a
topographically high spot on the beach in the
1997 elevation data.
Overwash can be seen
landward of the area of erosion as a thin blue line. In
profile comparison 1,
2.5 meters of
vertical erosion on the beach face is evident. This profile also shows that a significant
portion of the foredune was also removed. In
profile comparison 2,
the dunes appear to
have been completely eroded away.
Profile comparison 3
shows as much as 3.0 meters of
vertical beach erosion and complete destruction of the foredune.