LABORATORY STUDY OF DEEP-WATER BREAKING WAVES

In an attempt to elucidate the mechanics of deep-water wave breaking, a variety of breaking waves, including spilling and plunging waves, of different length scales and geometries was studied. The waves were ge nerated through wave-wave interactions using wave packets with constan t-steepness components, constant-amplitude components, and also compon ents following the Pierson-Moskowitz distribution. Wave steepening pri or to breaking were found to cause an increase in the high frequency s pectral slope of the wave spectrum. The slopes were correlated to the type of breaking and the intensity of the breaking. The energy loss th rough breaking varied with the spectral characteristics of the wave pa cket. On the other hand, it was also noted that, irrespective of the w ave packet, the losses were from the higher frequency end of the first harmonics. (C) 1998 Elsevier Science Ltd. All rights reserved.