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Title:	Floating breakwater wave-attenuation tests for East Bay Marina, Olympia Harbor, Washington : hydraulic model investigation
Authors:	United States. Army. Corps of Engineers. Seattle District. Carver, Robert D.
Keywords:	Breakwaters Marinas East Bay, Washington Olympia Harbor, Washington Floating breakwaters Water wave attenuation Hydraulic models Water waves Mobile breakwaters Floating breakwaters
Publisher:	Hydraulics Laboratory (U.S.) Engineer Research and Development Center (U.S.)
Series/Report no.:	Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-79-13.
Description:	Technical Report Abstract: An undistorted-scale hydraulic model study was conducted. Initially, two-dimensional (2-D) flume tests were employed to determine the wave-attenuating properties of four floating breakwater cross sections. Based on results of the 2-D tests and relative costs of the structures, the best plan was selected for three-dimensional (3-D) testing. The 3-D tests investigated the combined effects of angular wave attack, structure alignment, wave transmission, and wave diffraction around the exposed end of the breakwater system. The 2-D tests showed the transmission coefficient (Ct) to be strongly dependent on relative structure width (W/L) and weakly dependent on wave steepness (H/L) . Results of the 3-D tests showed that maximum wave-height attenuation was achieved when incident wave crests were at a 15-degree angle relative to the center line of the breakwater. Also, 3-D test data showed that a large decrease in the water depth (from 25 ft to 10 ft) only produced a slight decrease in transmitted wave heights.
Rights:	Approved for public release; distribution is unlimited.
URI:	http://hdl.handle.net/11681/13620
Appears in Collections:	Technical Report