Probabilistic assessment of beach and dune changes
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
The recent availability of spatially-dense airborne lidar data makes assessment of the vulnerability of beaches and dunes to storm impacts practical over long reaches of coast. As an initial test, elevations of the tops (D high) and bases (Dlow) of foredune ridges along a 55-km reach on the northern Outer Banks, NC were found to have considerable spatial variability suggesting that different parts of the barrier island would respond differently to storms. Comparing statistics of storm wave runup to D high and Dlow, we found that net erosion due to overwash and dune retreat should be greatest at the northern and southern ends of the study area and least in the central section. This predicted spatial pattern of storm-induced erosion is similar to the spatial pattern of long-term erosion of the shoreline which may be controlled by additional processes (such as gradients in longshore transport) as well as the cross-shore processes considered here. However, consider feedback where at erosional hot spots there is a deficit of sand (caused by gradients in longshore transport) which lead to lower dunes and enhanced erosional cross-shore processes, such as overwash. Hence, the erosional hot spots would be exacerbated, further increasing the vulnerability of the beach and dunes to net erosion.
Suggested Citation
Sallenger, A.H., Stockdon, H., Haines, J., Krabill, W., Swift, R., and Brock, J., 2004, Probabilistic assessment of beach and dune changes, in Coastal Engineering 2000 - Proceedings of the 27th International Conference on Coastal Engineering, ICCE 2000, v. 276, Sydney, NSW, 16 July 2000 through 21 July 2000, p. 3035-3047, https://doi.org/10.1061/40549(276)236.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Probabilistic assessment of beach and dune changes |
| ISBN | 0784405492; 9780784405499 |
| DOI | 10.1061/40549(276)236 |
| Volume | 276 |
| Publication Date | April 26, 2012 |
| Year Published | 2004 |
| Language | English |
| Larger Work Title | Coastal Engineering 2000 - Proceedings of the 27th International Conference on Coastal Engineering, ICCE 2000 |
| First page | 3035 |
| Last page | 3047 |
| Conference Title | Coastal Engineering 2000 - 27th International Conference on Coastal Engineering, ICCE 2000 |
| Conference Location | Sydney, NSW |
| Conference Date | 16 July 2000 through 21 July 2000 |