SYMBOLS AND DEFINITIONS 



C overlay stone weight per square meter of embankment surface (kilograms 

 per square meter) 



D typical dimension of a stone (meters) 



d water depth (meters) 



d s water depth at toe of structure (meters) 



g acceleration of gravity (9.80 meters (32.2 feet) per second squared) 



H wave height at toe of structure (meters) 



Hjnax maximum wave height at toe of structure (meters) 



H deepwater unrefracted wave height (meters) 



H s significant wave height at toe of structure (meters) 



Krr stability coefficient for riprap (eq. 6) 



L deepwater wavelength, L = gT 2 /2iT (meters) 



&£ lower limit of damage (meters) 



^u upper limit of damage (meters) 



N s stability number (eq. 4) 



R wave runup (meters) 



Rnjgx maximum wave runup for irregular wave conditions (meters) 



R s runup of a wave with the significant height and period of maximum 

 energy density (meters) 



r thickness of the armor layer when used with respect to runup; the ratio 

 of the runup on riprap to the runup on a smooth surface for the same 

 slope and wave conditions 



T wave period of a monochromatic wave (seconds) 



Tp wave period of maximum energy density of the spectrum (seconds) 



W average stone weight (kilograms) 



W50 median stone weight (kilograms) 



w r unit weight of stone (kilograms per cubic meter) 



w w unit weight of water (kilograms per cubic meter) 



G angle between the embankment slope and the horizontal 



a standard deviation 



