U vector stnn of longshore current velocity v and bottom wave 



orbital velocity D 



u wave orbital velocity component on horizontal plane 



Up wave orbital velocity at the bottom 



iL mean wave orbital velocity near the bottom 



I VL I the absolute value, maximum, wave orbital velocity near the 



bottom for sinusoidal motion 



V dimensionless longshore current velocity (v/v ) 



V,v the wave orbital velocity in the YY-direction parallel to 



the wave crests 



V a dimensionless longshore current velocity using V as 

 velocity scale 



v local longshore current velocity 



v mean velocity across the surf zone 



v longshore current velocity 



V, the breaker velocity, dimensionless 



Vj the midsurf velocity, dimensionless 



V maximum V at X , dimensionless 

 max max 



v horizontal (y) component of local fluid velocity (water 



particle velocity) 



v, time-averaged velocity at breaker line, dimensional 



v time-averaged maximum current velocity, dimensional 



m 



Vi time-average midsurf velocity, dimensional 



-1 



V velocity fluctuation in the y-direction 



V* longshore current velocity neglecting lateral turbulent 



mixing stresses 



■V* reference longshore current velocity at the breaker line 



neglecting lateral turbulent mixing 



V* modified v* from theory of Longuet-Higgins (1970) 



LtH. 



17 



