WAVE DIFFRACTION AROUND BREAKWATER

A three-dimensional, physical model study of diffraction around a semi -infinite breakwater was conducted using a directional spectral wave g enerator. Both regular and irregular waves with narrow and broad frequ ency and directional spreading were simulated. Surface elevations were measured in the lee of the breakwater, within a radius of three wavel engths of the tip. Comparisons with regular and irregular wave predict ion methods indicate the strengths and limitations of the methods for various wave conditions, and the importance of directional spreading. Data are given to assist other investigators in testing numerical mode ls.