20 



BOTTOM RETURN VELOCITY IN TERMS 

 OF WAVE PERIOD AND DEPTH 



.ioh« 



.09 h' 



.eeh' 



.07 h' 



OBh* 



_•.«.' 



.03h' 



oeh' 



Oih 



IS 20 25 30 3S 40 45 50 



d - FEET 



FiGUKB 8. 



and as the expression for the wave velocity: 



V2x 



1 + -^+--^) 



and: 



(t)= ! + «'+!«' • • • 



(18) 



