Symbol Definition 



Q • Discharge of air from the orifices of a 



submerged manifold, per ft of manifold 



(Q ■ ) Discharge of free air delivered by a com- 



pressor to a manifold, per ft of manifold 



Q Discharge of water from the orifices of a 



submerged manifold, per ft of manifold 



q Lateral discharge per unit of horizontal length 



•Arbitrary exponent (Section V only) 



R Hydraulic radius 



•Resultant force on structure (Fig. 6-16) 



•Reynolds number (Section V only) 



R^ Reynolds number 



(Rj,)„ Critical Reynolds number 



R^ Reynolds number for initiation of sediment 



motion (Section V only) 



r Arbitrary exponent (Section V only) 



•Radius of cylindrical plunger (Fig. 6-9) 



S Wave generator stroke (Eq 6-23; Fig. 6-9) 



•Channel slope (Eq 7-9) 



S^ Specific gravity of armor unit 



Sg Slope of energy gradient 



S2 Principal solar semidiurnal tidal harmonic 



constituent 



S.pS,, Maximum runup in x and y directions, 



respectively 



s Salinity concentration 



•ppt = parts per thousand 

 •p/m = parts per million; 



also abbreviated ppm 



sg Specific gravity (Section V only) 



T Time 



•Wave period 



•Period of pendulum (Eq 2-27, 2-28) 

 •Temperature (Eq 3-17, 3-20) 

 •Horizontal component of resultant 

 force on structure (Fig. 6-16) 



Tg Equilibrium temperature 



T^ Turning moment about landside toe of 



parapet (Fig. 6-40) 



Tj .J Significant wave period 



t Time 



•Thickness of n layers of armor units or 

 underlayer stones in rubble-mound 

 structure (Eq 6-40, 6-41) 



Dimension 



Unit 



L^/T/L 



ft-'/sec/ft length 



L^/T/L 



ft-'/sec/ft length 



L^/T/L 



ft^/sec/ft length 



L^/T/L 



ft-'/sec/ft length 



L 



ft 



F 



lb 



L 



ft 



L 



ft 



1./L 



ft/ft 



VL 



ft/ft 



L 



ft 



L 



ft 



_ 



ppt; p/m 



T 



sec 



T 



sec 



T 



% 



F 



lb 



_ 



°F 



J 



ft-lb 



T 



sec 



T 



sec 



L 



ft 



526 



