HR: 13:55h
AN: G33D-02 INVITED [Abstracts]
TI: Beach Recovery Rates Derived From Airborne LIDAR Following Hurricane Ivan
AU: * Robertson, W
EM: wrober01@fiu.edu
AF: Department of Earth Sciences, 11200 SW 8th St.
FIU UP Campus PC 344, Miami, FL 33199
United States
AU: * Robertson, W
EM: wrober01@fiu.edu
AF: International Hurricane Research Center, 11200 SW 8th St.
FIU UP Campus MARC 360, Miami, FL 33199
United States
AU: Zhang, K
EM: zhangk@fiu.edu
AF: International Hurricane Research Center, 11200 SW 8th St.
FIU UP Campus MARC 360, Miami, FL 33199
United States
AU: Zhang, K
EM: zhangk@fiu.edu
AF: Department of Environmental Studies, 11200 SW 8th St., Miami, FL 33199
United States
AU: Whitman, D
EM: whitmand@fiu.edu
AF: Department of Earth Sciences, 11200 SW 8th St.
FIU UP Campus PC 344, Miami, FL 33199
United States
AU: Leatherman, S P
EM: leatherman@fiu.edu
AF: International Hurricane Research Center, 11200 SW 8th St.
FIU UP Campus MARC 360, Miami, FL 33199
United States
AB:
Hurricanes are a major source for erosion and damage along the southeastern US coastline. This study uses airborne LIDAR data
to quantify shoreline change due to Hurricane Ivan. Hurricane Ivan made landfall on the Alabama gulf coast in September,
2004 with maximum sustained winds of 58 m/s. Five separate LIDAR data sets of barrier beaches situated in the front right
quadrant of the hurricane were collected during a six month period before and after landfall allowing an excellent timeline
for analyzing change in shoreline position. Shorelines were extracted and incremental shoreline position differences were
quantified for a 30 km portion of Panama City Beach, Florida. Preliminary results show alternating trends in shoreline
change. The hurricane caused an initial average shoreline retreat of more than 16 m relative to pre-storm positions. Within
three weeks this shoreline position recovered or moved seaward by 10 m. However, during the 2 month interval between October
and December, 2004, the shoreline again retreated 5 m. This 5 m of shoreline retreat in the two months following the initial
recovery could be attributed to the beach profile transition from summer to winter, and will have to be researched further.
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
SC: Geodesy [G]
MN: Fall Meeting 2005