Earlier studios had indicated that moored flexible bags positioned slightly below the water surface and filled with a liquid or a gas could at¬tenuate the height of gravity water waves„ The studies reported herein de-scribe large and small scale laboratory tests evaluating the attenuation ef¬fects and mooring forces for various bag configurations,, A breakwater composed of a mooredrow of lean, floating cylindrical bags filled with water provided excellent wave attenuation with moderate mooring forces. This type of break¬water appeared suitable for practical development of temporary wave protection works, Submerged bags filled with air also provide good, attenuation action but involved a substantial structural system for mooring.
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