SYMBOLS AND DEFINITIONS 



d water depth 



dg water depth at toe of structure 



g acceleration of gravity 



H wave height 



ti[)=0 zero damage wave height 



tig unrefracted deepwater wave height; R* is the deepwater 



equivalent of the wave height, H, measured in a given water 

 depth; H is related to H^ by the shoaling coefficient, H/H£ 



h a height of core above toe of rubble-mound structure 



K s shoaling coefficient 



k runup correction factor for scale effect 



k p roughness dimension, expressed as an armor unit length 



L wavelength in a water depth, d 



L Q deepwater wavelength; wavelength in water of depth, d, 

 where d/L > 0.5 



t horizontal length of slope (beach slope) fronting toe of 



structure 



q empirical exponent used in runup equation 



R runup; the vertical rise of water on structure face resulting 



from wave action 



R e Reynolds number 



r ratio of rough-slope runup to smooth-slope runup; rough-slope 



runup correction factor 



T wave period 



W armor stone weight 



8 beach slope, used for slope fronting a structure; different 

 from structure slope 



9 structure slope 



v kinematic viscosity 



