zero position wovt board 

 i 



wav* guid* 



tot of clept 1:10 



— 35 l/ste 

 (edjuttid) 



mecn wave sel-up line mean breaker line 



distribution system 



Figure 10. Uniform, depth-averaged longshore current profiles and cir- 

 culation velocities under optimum conditions of minimum cir- 

 culations (Q^ = 19.2 liters per second), adjusted return 

 flows (Qj. = 35 liters per second) and upstream distribution 

 system (from Visser, 1980). 



wave guide ■ 



zero position wave board 



1 



/--=—;-, 



mean wove set-up line 



mean breaker line 



Figure 11. Measurements in wave basin with only surf zone openings in 

 both waveguides and free recirculation (no pump) (from 

 Visser, 1980). 



40 



