Symbol 



Definition 



o 

 en 



d. 



1 



50 



Wave celerity; phase velocity 

 # Volumetric particle concentra- 

 tion (eq. 4-10) 

 • Empirical overtopping coeffi- 

 cient (eq. 7-18) 



Wave speed at breaking 



Friction factor (eq. 4-51) 



Drag coefficient 



Group velocity 



Lift coefficient 



Mass or inertia coefficient 



Deepwater wave velocity 



Jacobian elliptical cosine 

 function 



Total water depth, including 

 surge 



9 Depth one wavelength in front 

 of wall (eq. 7-85) 



• Duration of an observation 



• Decay distance 



• Pile diameter 



• Percent damage to rubble struc- 

 ture (Table 7-9) 



• Area perpendicular to flow 

 direction per unit length 

 of pile 



• Quarrystone diameter 



Water depth (bed to SWL) 



• Grain diameter 



• Undisturbed water depth 



Depth of water at breaking wave 



Water depth at seaward limit to 

 extreme surf-related effects 



Equivalent stone diameter 



Water depth at seaward limit to 

 sand agitation by the median 

 annual wave condition (eq. 4-28) 



• Water depth at seaward edge of 

 structure 



Water depth at toe of structure 



• Sphere diameter (eq. 4-6) 



Depth below SWL of rubble foun- 

 dation crest (Fig. 7-120) 



Size of 50 percentile of sedi- 

 ment sample (d,. = M.) 



Total energy in one wavelength 

 per unit crest width 

 • Crest elevation of structure 

 above MLW or other datum plane 



Dimension 



L/T 



L/T 



L/T 



L/T 



LF/L 

 L 



Example Units 



Metric 



m/s 



m/s 



n/s 



m/s 



English 



ft/s 



ft/s 



ft/s 



ft/s 



ft 

 ft 



hr 



nmi 

 ft 



ft' 

 ft 



ft 



ft 



ft 



ft 

 ft 



ft 

 ft 

 ft 



Units consistent with units of gravita- 

 tional acceleration and viscosity in 

 equation (4-6) 



ft 



N-m/m crest width 



ft-lb/ft crest 



width 

 ft 



(Continued) 



B2 



