Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sacrificial Dune Role in Coastal Barrier Protection
Duxbury Beach is a 5.5 mile long barrier beach system owned by Duxbury Beach Reservation. The barrier beach protects the landward harbors and shorefronts of the Towns of Duxbury, Kingston and Plymouth, Massachusetts and is the only land access to the isolated communities of Gurnet and Saquish in the Town of Plymouth. A critical aspect of the storm protection function of Duxbury Beach is the "sacrificial dune" which was constructed in 1992 after the October 1991 "No Name" storm (also called the "Halloween nor'easter"). As a result of a Presidential declaration of disaster, the Federal Emergency Management Agency (FEMA) concluded that the very low post-storm elevation of the barrier posed a significant public safety concern and urged the Duxbury Beach Reservation to take immediate action to restore the barrier and raise the dune elevation. After consultation with the U.S. Army Corps of Engineers (USACE), FEMA, based on its regulations, recommended that a sacrificial dune consisting of sand should be constructed to a consistent elevation of 16 feet NGVD (National Geodetic Vertical Datum). This is the peak elevation that would be reached during a hypothetical "5-year storm" (an event predicted to occur, on average, once every five years), which includes wave run-up. Following its construction, winter storms eroded and overwashed some of the sacrificial dune; however, most sand from that dune is believed to be contained within the Duxbury Beach barrier system.
Sacrificial Dune Role in Coastal Barrier Protection
Duxbury Beach is a 5.5 mile long barrier beach system owned by Duxbury Beach Reservation. The barrier beach protects the landward harbors and shorefronts of the Towns of Duxbury, Kingston and Plymouth, Massachusetts and is the only land access to the isolated communities of Gurnet and Saquish in the Town of Plymouth. A critical aspect of the storm protection function of Duxbury Beach is the "sacrificial dune" which was constructed in 1992 after the October 1991 "No Name" storm (also called the "Halloween nor'easter"). As a result of a Presidential declaration of disaster, the Federal Emergency Management Agency (FEMA) concluded that the very low post-storm elevation of the barrier posed a significant public safety concern and urged the Duxbury Beach Reservation to take immediate action to restore the barrier and raise the dune elevation. After consultation with the U.S. Army Corps of Engineers (USACE), FEMA, based on its regulations, recommended that a sacrificial dune consisting of sand should be constructed to a consistent elevation of 16 feet NGVD (National Geodetic Vertical Datum). This is the peak elevation that would be reached during a hypothetical "5-year storm" (an event predicted to occur, on average, once every five years), which includes wave run-up. Following its construction, winter storms eroded and overwashed some of the sacrificial dune; however, most sand from that dune is believed to be contained within the Duxbury Beach barrier system.
Sacrificial Dune Role in Coastal Barrier Protection
Smith, Jr., Lester B. (Autor:in) / Vautrinot, Alan (Autor:in) / Rosen, Peter (Autor:in) / FitzGerald, Duncan (Autor:in) / O'Connell, Jim (Autor:in)
Solutions to Coastal Disasters Conference 2005 ; 2005 ; Charleston, South Carolina, United States
Solutions to Coastal Disasters 2005 ; 344-353
02.05.2005
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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