Journal
WETLANDS
Volume 29, Issue 1, Pages 44-53Publisher
SOC WETLAND SCIENTISTS
DOI: 10.1672/07-233.1
Keywords
aerial videography; damage assessment; Everglades National Park; Hurricane Andrew; remote sensing; southwest Florida; spatial analysis; Ten Thousand Islands National Wildlife Refuge
Categories
Funding
- Everglades National Park Critical Ecosystem Study Initiative
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The Everglades ecosystem contains the largest contiguous tract of mangrove forest Outside the tropics that were also coincidentally intersected by a major Category 5 hurricane. Airborne videography was flown to Capture the landscape patient and process of forest damage in relation to storm trajectory and circulation. TWO aerial video transects, representing different topographic positions, were used to quantify forest damage from video frame analysis in relation to prevailing wind force, treefall direction, and forest height. A hurricane simulation model wits applied to reconstruct wind fields corresponding to the ground location of each video frame and to correlate observed treefall and destruction patterns with wind speed and direction. Mangrove forests within the storm's eyepath and ill the right-side (forewind) quadrants suffered whole or partial blowdowns, while left-side (backwind) sites South of the eyewall zone incurred moderate canopy reduction and defoliation. Sites along file coastal transect sustained substantially more storm damage than sites along the inland transect which may be attributed to differences in stand exposure and/or Mature. Observed treefall directions were shown to be non-random and associated with hurricane trajectory and simulated forewind azimuths. Wide-area sampling using airborne videography provided an efficient adjunct to limited ground observations and improved our spatial understanding of how hurricanes imprint landscape-scale patterns of disturbance.
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