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Title: Effects of wave action on a hurricane protection structure for London Avenue Outfall Canal, Lake Pontchartran, New Orleans, LA
Authors: Bottin, Robert R.
Mize, Marvin G.
Keywords: Hurricane protection
Hydraulic models
London Avenue Outfall Canal
Water waves
Publisher: Coastal Engineering Research Center (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; CERC-87-14.
Description: Miscellaneous paper
Abstract: Statistical trends of the duration of extreme wave conditions, as characterized by hindcast wave information, are investigated at five sites along the coastline of the United States (three on the Atlantic coast and two on the Pacific coast). A review of pertinent statistical concepts and water wave characterization conventions and terminology is followed by a description of the Wave Information Studies Program of the US Army Engineer Waterways Experiment Station,Vicksburg, Miss. The database of hindcast wave information in shallow water created by this program is applied to develop a method of identification of extreme events and definition of their duration, based on exceedance of a threshold for zero moment wave heights. The number of events identified is found to be proportional to the percent exceedance of the specified threshold, regardless of geographical location. The Extremal Type I distribution is found to be superior to the Weibull distribution as a model for both distribution of durations and peak zero moment wave heights of extreme events identified. A regression analysis of duration with various parameters representing peak wave conditions reveals only a weak linear relation with peak zero moment wave height and little evidence of a linear relation with any other parameter investigated. The assumption of independence of duration from peak wave conditions is proposed as an expedient method for estimating durations above a specified threshold, given a peak wave condition.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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