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St. Petersburg Coastal and Marine Science Center > Coastal Change Hazards: Hurricanes and Extreme Storms > Hurricane Dennis

Coastal Change Hazards: Hurricanes and Extreme Storms

Hurricane Dennis (1999)

 
Selected Locations
Location map showing survey locations
Selected Survey Locations: Click on one of the two locations above, Rodanthe, NC or Buxton, NC to see photographs and data plots from lidar.
In terms of peak magnitude, Dennis was a marginal hurricane that deteriorated into a tropical storm before coming ashore in North Carolina. However, its duration was remarkable, sitting off the northern Outer Banks for about a week generating large waves that pounded the coast. In fact, at the U.S. Army Corps of Engineers Field Research Facility at Duck, North Carolina, wave height was the third highest in the 20 years of record, reaching 6.3 m at a buoy in 20 m of water.

Field Surveys

Three types of field surveys were conducted during the week of 9/6 to 9/10/99:

Coastal Change From Lidar: NASA, USGS and NOAA surveyed the Dennis impact zone on the Outer Banks of North Carolina using NASA's Airborne Topographic Mapper (ATM), a scanning airborne laser altimeter. The survey extended from near the North Carolina/Virginia state line to Ocracoke Inlet, about 50 km southwest of Cape Hatteras. The total swath width of the survey was 500-600 m including the beach and the first foredune ridge. Click on one of the locations on the map above (Rodanthe | Buxton) to see examples of lidar results.

 
Oblique Aerial Photography: USGS personnel aboard a small plane acquired oblique video and still photography for the NC coast from Cape Lookout, NC to Sand Bridge, VA. Results from that mission are compared to pre-storm July, 1996 photography on these pages: (see map at right:
[Area 1 | Area 2 | Area 3]).

Ground Survey: A USGS ground crew visited impacted sites and mapped storm features using handheld GPS. They focused on the reach from Cape Hatteras, NC to Oregon Inlet, NC including Hatteras National Seashore and Pea Island National Wildlife Refuge. Rodanthe, North Carolina Buxton, North Carolina Area 1 Area 2 Area 2 Area 3 Area 3


St. Petersburg Coastal and Marine Science Center > Coastal Change Hazards: Hurricanes and Extreme Storms > Hurricane Dennis

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