Accession Number : ADA483149


Title :   Analytical Model of Incipient Breaching of Coastal Barriers


Descriptive Note : Journal article


Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB


Personal Author(s) : Kraus, Nicholas C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a483149.pdf


Report Date : 29 Sep 2003


Pagination or Media Count : 22


Abstract : A mathematical model is formulated to describe incipient breaching of coastal barrier islands. The model is based on the assumptions of idealized breach morphology and is in- tended to describe the growth of breaches prior to possible closure by longshore sediment transport. The two coupled, non-linear equations governing breach width and depth are solved analytically for special cases. The analytical solutions explicitly exhibit an expo- nential behavior in breach dimensions and reveal that the macroscale process of breach growth is controlled by seven variables: initial width and depth of the breach, equilibrium width and depth of the breach, width of the barrier island, and maximum or initial net sediment transport rates at the bottom and sides of the breach. The literature is reviewed to compile general properties of coastal breaches, and sensitivity testing shows the model to be compatible with those observations.


Descriptors :   *BARRIERS , *COASTAL REGIONS , WATER FLOW , INLETS(WATERWAYS) , MORPHOLOGY(BIOLOGY) , COASTAL ENGINEERING , ISLANDS , REPRINTS , MATHEMATICAL MODELS


Subject Categories : Geography


Distribution Statement : APPROVED FOR PUBLIC RELEASE