waters. The procedure accounts for the external energy dissipation by 

 considering the seaward slope to be essentially impermeable. Subtracting 

 the externally dissipated energy the partition of the remaining energy 

 among reflected, transmitted, and internally dissipated energy is deter- 

 mined by considering the interaction of an equivalent incident wave 

 (representing the remaining wave energy), with a homogeneous rectangular 

 breakwater which is hydraulically equivalent to the trapezoidal, multi- 

 layered breakwater. This procedure which attempts to account for the 

 energy dissipation where it takes place, in contrast to the procedure 

 developed by Sollitt and Cross (1972), yields excellent predictions of 

 the reflection and transmission coefficients obtained experimentally by 

 Sollitt and Cross. 



