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

Coastal Change Hazards: Hurricanes and Extreme Storms

Hurricane Gustav

Post-Landfall Assessment of Potential Coastal-Change Impacts

Posted: 09/05/2008 7pm

Note: The post-landfall assessment of potential coastal-change impacts is done by comparing pre-storm dune/berm elevations to updated surge elevations obtained from model simulations based on the actual storm scenario.

Prior to hurricane landfall, the potential inundation of the beach system and associated coastal changes were initially assessed by comparing pre-storm dune/berm elevations to maximum surge elevations obtained from model simulations of hypothetical storm scenarios.

After landfall, updated surge elevations were obtained from model simulations based on the actual storm scenario. The potential for inundation was then re-assessed for the same five focus areas: Galveston Bay, Chenier Plain (southwest coast of LA), Isles Dernieres, Chandeleur Islands, and Dauphin Island. Extreme coastal change is expected to occur in areas where the updated surge levels indicate inundation (indicated by red on the maps).

Location map for five areas of focus with track of Hurricane Gustav.
Dauphin IslandChandeleur IslandsIsles DernieresChenier PlainGalveston Bay
Location map for five areas of focus and the track of Hurricane Gustav. Click on any of the five areas to see the updated potential inundation map for that area.

Galveston Bay, TX

Inundation potential (storm surge minus dune elevation) for for the barrier island beaches near Galveston Bay
Updated assessment of inundation potential (I, storm surge minus dune elevation) for Galveston Bay, TX. Reds indicate areas where modeled surge, specific to Hurricane Gustav storm conditions and landfall location, exceeds the elevation of the primary dune, suggesting greater potential for inundation of the beach system and for severe coastal changes. [larger version]

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Western Louisiana Chenier Plain

Inundation potential for the Chenier Plain of southwest Louisiana.
Updated assessment of inundation potential (I, storm surge minus dune elevation) for the southwest Chenier Plain of LA. Reds indicate areas where modeled surge, specific to Hurricane Gustav storm conditions and landfall location, exceeds the elevation of the primary dune, suggesting greater potential for inundation of the beach system and for severe coastal changes. [larger version]

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Isles Dernieres, LA

Inundation potential for Isles Dernieres, LA.
Updated assessment of inundation potential (I, storm surge minus dune elevation) for the Isles Dernieres, LA. Reds indicate areas where modeled surge, specific to Hurricane Gustav storm conditions and landfall location, exceeds the elevation of the primary dune, suggesting greater potential for inundation of the beach system and for severe coastal changes. [larger version]

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Chandeleur Islands, LA

Inundation potential for the Chandeleur Islands, LA.
Updated assessment of inundation potential (I, storm surge minus dune elevation) for the Chandeleur Islands, LA. Red indicates areas where modeled surge, specific to Hurricane Gustav storm conditions and landfall location, exceeds the elevation of the primary dune, suggesting greater potential for inundation of the beach system and for severe coastal changes. [larger version]

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Dauphin Island, AL

Inundation potential for Dauphin Island.
Updated assessment of inundation potential (I, storm surge minus dune elevation) for Dauphin Island, AL. Reds indicate areas where modeled surge, specific to Hurricane Gustav storm conditions and landfall location, exceeds the elevation of the primary dune, suggesting greater potential for inundation of the beach system and for severe coastal changes. [larger version]

For more information about the storm-impact scale and coastal changes expected during hurricane landfall, see the Storm-Impact Scale and Storm-Induced Coastal Change sections. Details on the experimental Tropical Cyclone Storm Surge Probabilities product can be obtained from NOAA/NWS Meteorological Development Laboratory.

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Related links:

Storm-Impact Scale
USGS

Storm-Induced Coastal Change
USGS

USGS Mendenhall Postdoctoral Research Fellowship
USGS

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

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