Accession Number : ADA582930


Title :   The Modified Bruun Rule Extended for Landward Transport


Descriptive Note : Journal article


Corporate Author : CORPS OF ENGINEERS WASHINGTON DC


Personal Author(s) : Rosati, J D ; Dean, R G ; Walton, T L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a582930.pdf


Report Date : 13 May 2013


Pagination or Media Count : 13


Abstract : The Bruun Rule provides a relationship between sea level rise and shoreline retreat and has been widely applied by the engineering and scientific communities to interpret shoreline changes and to plan for possible future increases in sea level rise rates. The Bruun Rule assumes that all sand removed from the upper profile is deposited offshore as sea level rises although overwash during storms and landward Aeolian transport clearly indicate otherwise. This article examines processes associated with sandy beach evolution in response to relative sea level rise and proposes a modified form of the Bruun Rule that considers the full range of parsing cross-shore transport, from completely seaward to completely landward, depending on the prevailing storm and surge conditions and whether there is a surplus or deficit of sand in the profile with respect to the equilibrium beach profile. A methodology is proposed that more appropriately represents the long-term processes and beach response. However, an improved quantitative understanding of landward transport is required for optimal application of the proposed method.


Descriptors :   *BEACH EROSION , *SEA LEVEL , *SHORES , ISLANDS , SAND , SEDIMENT TRANSPORT , STORMS


Subject Categories : Physical and Dynamic Oceanography
      Geodesy


Distribution Statement : APPROVED FOR PUBLIC RELEASE