Coastal Engineering Significance. Field data from and near an important 

 ocean current are examined and show reasonable agreement with theory. 

 Wave-current interaction in the Agulhas Current has been suspected as 

 the cause of giant waves that endanger shipping (see MALLORY, 1974). 



50. SHAW, T.L., ed., Mechanics of Wave-Induced Forces on Cylinders, 

 Publishing Ltd., London, England, 1979. 



Keywords. Forces on Structures; Review. 



Discussion. This book of conference proceedings provides an overview of 

 the current state-of-the-art in predicting forces on cylinders due to 

 water-wave motion. There are some papers solely on water waves review- 

 ing aspects such as wave-current interactions, wave breaking, and wave 

 generation in the laboratory. 



The bulk of the papers describe experiments, some giving details of 

 flow fields about cylinders, others on the effect of cylinders on waves, 

 but the majority are concerned with forces on cylinders. These 

 cylinders are mostly circular in shape and are usually either vertical 

 or horizontal. 



The variety of objects that come under the heading of "cylinders" 

 includes cables and pontoons as well as the more obvious pipes and 

 elements of large structures. 



Coastal Engineering Significance. This book provides a collection of 

 recent work on wave-induced forces, including forces due to wave-current 

 interactions, by the leading workers on the subject. 



51. SKODA, J.D., "The Interaction of Waves and Turbulence in Water," 

 Government Reports Announcements, Vol. 73, No. 6, Mar. 1973, pp. 

 73. 



Keywords. Experiment; Spectra; Turbulence; Waves, Wind. 



Discussion. The report investigates a system in which water waves are 

 generated and propagated in a turbulent flow field. The growth of wind 

 wave spectra and the decay of monochromatic waves are considered. For 

 monochromatic waves the turbulence in the water can greatly increase the 

 rate of wave energy dissipation and the data can be fitted by an 

 equation with an eddy viscosity term proportional to the wave height, 

 the phase speed of the waves, and the intensity of the large-scale 

 turbulence. Growth of wind waves in turbulent water is faster than in 

 still water; however, maximum wave height in turbulent water is always 

 lower than in still water. Wave energy spectra at the longer fetches in 

 turbulent water show more wave energy at low frequency and less at high 

 frequency than those for still water. Turbulence in water alters the 



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