



1 

 LEGEND 





1 





i 





1 





1 



1 





1.0 



+ 



(h/l) I0 2 

 4 to 1.9 





















- 



- 



• 



20 to 6.1 

















+ 







■2 0.8 



o 



X 



6 1 to 10. 1 



















+ 







D/d = 0.51 

















t 







o 





B/D = 12.0 









* 

 + 









+ 

 + 







1 0.6 





G/0 = 3.3 

 D - 102cm 









+ + 



+ 





* 





V 





- 



f 





• 



1/ 



• 

 • 



• _ 



i* 



• 





+ 



o 

 • 



• 





- 



1 0.4 



o 



S 



• • 



h> 



0.2 

 n 





t 



f 



1 





I 





1 





1 



1 



_ 



0.5 



1.5 2.0 2.5 



Relative Wavelength ( L/B ) 



3.5 



Figure 35. Wave transmission data for PT-1 breakwater (d = 2.0 m) . 



in filtering out waves that are shorter than the width of the structure, but 

 becomes increasingly less effective as the wavelength increases. It is evi- 

 dent that the breakwater is significantly more effective at the lower depth, 

 particularly for longer waves. The influence of water depth, or relative 

 draft D/d, becomes particularly apparent in Figure 36 where the transmission 

 curves are compared. 





1 1 1 — 



H/L* 0.04 



■ i 1 1 



— 1.0 





- 



o 

 OOB 





^ 0.22 



o 







E 6 



o 

 1— 





D/d =0.51 



S 04 



X 





. 



«» 



o 0.2 





B/0 6/0 Ofcml " 

 12.0 3.3 102 







1 1 i 



i i i i 



Relative Wavelength (L/B) 



Figure 36. Wave transmission design curves for PT-1 breakwater. 



39 



