0.20 



0.15 



0.10 



0.05 



Av/Ho 



0.00 



0.0 



2.5 



Figure 54. Exponential relation for Ay/H^ as 

 a function of £ 



Av 



= 0.16(1 - <T°- 85 ?o) 



(95) 



for 0.29 < £ < 2.06 . A linear regression was also made for spilling and 

 plunging waves only, shown in Figure 55, which gave: 



Av 

 = 0.005 + 0.089£ o 



(96) 



The coefficient of determination was 0.69, and the equation is limited to 

 0.29 < £ < 1.07 . Vortex area was also plotted versus £ b , Figure 56. The 

 line drawn through the data represents 



107 



