Keywords
levee
storm surge
overtopping
hydraulic load
back slope strength
grass
hydraulic fill
breach development
breach intensity
length effect
hurricane Katrina
New Orleans
inundation
risk analysis
reliability analysis
How to Cite
Abstract
Risk Analysis of sea dikes is a fundamental tool for protection of human health and safety, private and public property and cultural heritage. The modern risk concept defines risk as the product of inundation probability times the consequences of inundation. The risk concept is a versatile tool for any matter, public, private or environmental endangered by storm surges. The hydraulic task in a sea dike risk analysis is the determination of the internal water level. The present breaching intensity model, is part of a connected complex of models for transforming an external surge to an internal inundation. The complex is calibrated on the New Orleans East Back Levee breaches blown by hurricane Katrina in 2005.References
Bernitt, L.M. (2005). Risikoanalyse af digebeskyttede områder (In Danish), Danish Coastal Authority, Lemvig, December 2005.
Bernitt, L.M. and WL Delft. (2008). Risk Analysis of Dike Protected Areas, rough translation of Risikoanalyse af digebeskyttede områder, WL Delft and Danish Coastal Authority, Lemvig, May 2008.
Bernitt, L.M. and Madsen, H.T. (2008). Temporal Development of a Sea Dike Breach, Proceedings of 31 th
International Conference on Coastal Engineering, ICCE 2008, Hamburg, ASCE, 3237-3249.
IPET - Interagency Performance Evaluation Task Force. (2006). Performance Evaluation of the New Orleans and Southeast Louisiana Hurricane Protection System, Volume V - The Performance -Levees and Floodwalls, Appendix 18 Erosion of New Orleans and St. Bernard Levees, Attachment A - New Orleans East Back Levee, Attachment B - Chalmette Levee, US Army Corps of Engineers, 1. June 2006, Final Draft.
IPET - Interagency Performance Evaluation Task Force. 2007-2009. Performance Evaluation of the New Orleans and Southeast Louisiana Hurricane Protection System, Final Reports, Volume I to IIIV, US Army Corps of Engineers.
Rijkswaterstaat, ComCoast and Zeeweringen. (2008). Erosion strength of inner slopes of dikes against wave overtopping. Preliminary conclusion after two years of testing with the Wave Overtopping
Simulator, Deltares, Van der Meer Consulting B.V., Royal Haskoning, Alterra and Infram, Versie 1. 1, August 2008.
Van der Meer, J. W. and Janssen, J.P.F.M. (1994). Wave Run-up and Wave Overtopping at Dikes and Revetments, Delft Hydraulics, August 1994.
Vrouwenvelder, A. C. W. M. and Steenbergen, H. M. G. M. (2003). Theoriehandleiding PC-ring, Deel B: Statistische modellen, TNO Bouw, 2003-CI-R0021, DG Rijkswaterstaat, April 2003.