Abstract
Quantitative procedures provide the eroded dune geometries expected during an extreme storm on U.S. Atlantic and Gulf coasts. A criterion for either duneface retreat or dune removal is based on measured erosion cross sections in many cases where the pre-storm dune proved to be a durable barrier to wave effects. After that decision, the eroded profile is constructed using specified planar segments cut into or across the existing dune. This empirical treatment appears appropriately detailed for assessing hazards due to the 100-year event considered within the U.S. National Flood Insurance Program, and an example assessment is outlined. Additional discussion addresses other site-specific factors possibly affecting dune erosion, along with another potential application for this simplified methodology.
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