2 

 A, Area of damage (cm ) 



2 

 A Cross-sectional area of breakwater (cm ) 



B Bulk number, defined by Equation 3 



n 



C Response slope of reef to wave action, defined by Equation 5 



C Effective "as built" reef slope, defined by Equation 4 



C Dimensionless coefficient 



d Water depth at toe of breakwater (cm) 

 s 



1/3 

 d sf . (W sn /w ) , typical dimension of the median stone (cm) 



F h - d , freeboard of structure which for reef can be either positive 

 c s 



or negative (cm) 



h Crest height of breakwater after wave attack (cm) 

 c 



h' Crest height of breakwater "as built" (cm) 



H Zero-moment wave height at transmitted gage locations with no 

 breakwater in channel (cm) 



H Zero-moment transmitted wave height (cm) 



H Incident zero-moment wave height (cm) 

 mo 



K Reflection coefficient of breakwater as defined and calculated by 



r 



r 



50 



method of Goda and Suzuki (1976) 



K H /H , wave transmission coefficient 

 t t c 



L Airy wave length calculated using T and d (cm) 

 P P s 



N Stability number, defined by Equation 1 

 s 



N* Spectral stability number, defined by Equation 2 



T Wave period of peak energy density of spectrum (sec) 



P 



3 

 Density of stone (g/cra ) 



3 

 Density of water, tests conducted in fresh water, w =1.0 (g/cm ) 



W Median stone weight (subscript indicates percent of total weight of 



gradation contributed by stones of lesser weight) (g) 



C3 



