SYMBOLS AND DEFINITIONS 
incident wave amplitude at a spectral line 
reflected wave amplitude at a spectral line 
real and imaginary spectral coefficients from an FFT analysis 
representative armor diameter = (w/y) 1/3 
water depth at the toe of the structure 
acceleration due to gravity 
a representative breaking wave height at the toe of the structure 
incident wave height (use Hg for irregular waves) 
deepwater wave height 
reflected wave height 
significant wave height 
transmitted wave height 
wave dissipation coefficient 
wave reflection coefficient 
wave transmission coefficient 
wave number = 27/L 
wavelength at the toe of the structure 
deepwater wavelength from linear theory = gT?/(2n) 
offshore slope seaward of the structure 
number of layers of armor 
wave runup 
Reynolds number 
wave period (use period of peak energy density for irregular waves) 
period of peak energy density 
weight of armor material 
empirical wave reflection parameters 
specific weight of armor unit material 
wave gage spacing 
average root-mean-square surface water level 
angle of the seaward structure face 
kinematic viscosity of water 
surf similarity parameter = tan 6/VHj/Lo 
