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Influence of Water-Level Variation on the Performance of Great Lakes Beach Nourishments

by Leonard J. Madalon, Jr., U.S. Army Corps of Engineers, San Francisco, United States,
William L. Wood, U.S. Army Corps of Engineers, San Francisco, United States,
M. Todd Stockberger, U.S. Army Corps of Engineers, San Francisco, United States,



Document Type: Proceeding Paper

Part of: Coastal Sediments

Abstract:

In an effort to evaluate the influence of Great Lakes water level change on beach nourishment profile adjustment, an extensive ten year monitoring study was conducted in southern Lake Michigan. Analysis showed that beach nourishment profile adjustment was consistant with the concept of an equilibrium profile. However, equilibrium profile adjustment was found to lag lake level for both rising and falling conditions. No significant relation was found between sediment size and the A parameter for beach nourishment profiles. Applications of the equilibrium concept through a modified version of Dean's (1983) shoreline extension model showed good agreement between predicted and observed beach nourishment shoreline positions.

Subject Headings: Beach protection and nourishment | Beach profiles | Lakes | Water level | Equilibrium | Shoreline protection | Sediment | Great Lakes | Lake Michigan

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