WAVE OF TRANSLATION. A wave in which the water particles are permanently 

 displaced to a significant degree in the direction of wave travel. 

 Distinguished from an OSCILLATORY WAVE. 



WAVE, TROCHOIDAL. See TROCHOIDAL WAVE. 



WAVE TROUGH. The lowest part of a wave form between successive crests. Also 

 that part of a wave below still-water level. 



WAVE VARIABILITY. See VARIABILITY OF WAVES. 



WAVE VELOCITY. The speed at which an individual wave advances. 



WAVE, WIND. See WIND WAVES. 



WAVELENGTH. The horizontal distance between similar points on two successive 

 waves measured perpendicular to the crest. (See Figure A-3.) 



WAVES, INTERNAL. See INTERNAL WAVES. 



WEIR JETTY. An updrift jetty with a low section or weir over which littoral 

 drift moves into a predredged deposition basin which is dredged 

 periodically. 



WHARF. A structure built on the shore of a harbor, river, or canal, so that 

 vessels may lie alongside to receive and discharge cargo and passengers. 



WHITECAP. On the crest of a wave, the white froth caused by wind. 



WIND CHOP. See CHOP. 



WIND, FOLLOWING. See FOLLOWING WIND. 



WIND, OFFSHORE. A wind blowing seaward from the land in a coastal area. 



WIND, ONSHORE. A wind blowing landward from the sea in a coastal area. 



WIND, OPPOSING. See OPPOSING WIND. 



WIND SETUP. On reservoirs and smaller bodies of water (1) the vertical rise 

 in the still-water level on the leeward side of a body of water caused by 

 wind stresses on the surface of the water; (2) the difference in still- 

 water levels on the windward and the leeward sides of a body of water 

 caused by wind stresses on the surface of the water. STORM SURGE (usually 

 reserved for use on the ocean and large bodies of water). (See Figure 

 A-11.) 



WIND TIDE. See WIND SETUP, STORM SURGE. 



WIND WAVES. (1) Waves being formed and,, built up by the wind. (2) Loosely, 

 any wave generated by wind. 



WINDWARD. The direction from which the wind is blowing. 



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