APPENDIX A: NOTATION 



7 Spectral shape parameter 



7 r Unit weight (saturated surface dry) of individual stone, pcf 

 7 W Unit weight of water in which stone are placed, pcf 



8 Angle measured relative to horizontal 



low Shape parameter for face of spectral energy density curve for f 

 less than f 



Shape parameter for face of spectral energy density curve for f 

 greater than f 



'high 



B Berm length 



C r Wave reflection coefficient equal to H iy /H r 



d s Water depth at structure toe, ft 



f Frequency, Hz 



f Peak frequency, Hz 



d 1 Water depth at top of berm stone or buttressing stone, ft 



H Test wave height, ft 



H D Design wave height, ft 



E i Incident wave height, ft 



H r Reflected wave height, ft 



k. Armor stone shape coefficient (equal to 1.0 for rough angular stone) 



L s Wave length in water depth d s , ft 



L x Wave length in water depth d x , ft 



N s Toe berm stone and toe buttressing stone stability number 



S r Specific gravity of armor stone relative to water in which it is 

 placed 



t Thickness of armor, ft 



T Wave period, sec 



W Weight of individual armor stone, lb 



W 50 Weight of median size armor stone, lb 



B/^ Relative berm length 



d-L/d,. Relative berm stone or buttressing stone depth 



dj/I^ Relative water depth at top of berm stone or buttressing stone 



d s /L s Relative water depth at toe 



H D /L S Wave steepness at structure toe 



H D /d s Relative wave height at structure toe 



Al 



