The Seawall Road. April 17, 2007 Terms Used Setup + Swash = R 2.

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Presentation transcript:

The Seawall Road

April 17, 2007

Terms Used Setup + Swash = R 2

Parameterization for Runup Elevation Dr. Hilary Stockdon Ground truthed extensively Tested in Hurricanes Bonnie, Floyd, Ike, and Ivan Tested in Hurricanes Bonnie, Floyd, Ike, and Ivan Real time forecasts done every season since Hurricane Ivan Real time forecasts done every season since Hurricane Ivan

Parameterizing Runup Elevation Foreshore Beach Slope Slope of the swash zone

Parameterizing Runup Elevation Foreshore Beach Slope Deepwater Wave Height

Parameterizing Runup Elevation Before Shore Beach Slope Deepwater Wave Height Wave Length

Parameterizing Runup Elevation Wave Setup Elevated water level along shore This is a time averaged water level Results from breaking waves producing radiation stress

Parameterizing Runup Elevation Wave Setup Swash This is a time varying water level Large waves making incursions up the beach

Parameterizing Runup Elevation Infra-Gravity waves Long period waves of 3 to 30 minutes Generated in areas of differential Radiation stress in swell groups in transit from the fetch area to the coast.

Coastal Impact Tool = Dune Toe = Dune Crest

Coastal Impact Tool If runup greater than dune base Erosion: If runup greater than dune crest Overwash: If surge greater than dune crest Inundation: Total Water level: Rlo…is total surge level. Total Water level: Rhi…is total runup level. R2% is the height of the Setup + Swash. Expected Not Expected 5.7 M M M

SRF Forecast