,0 

 8 

 6 



4 



DIRECTION OF 

 INCIDENT WAVE 



5 2 



GAP — 1 

 B = L/2 ^ 



y/L 



D 2 4 6 8 10 12 14 16 18 20 









-- 



^ 







K'=0.l 





^ 



^ 





























































^V 



V- 



\ 



^-. 







GEOMETRIC 



1 



SHADOW ^ 







ddd o" 



to 

 d 





CM 

 O 















Fig. 22 CONTOURS OF EQUAL DIFFRACTION COEFFICIENT 

 GAP WIDTH =0.5 WAVE LENGTH (B/L = 0.5) 



Diffracted Wove Height 



Inciclent Wove Height 



^ 



2 § 



r^ to 

 O d 



in 

 d 



o 





ro 

 O 











^_^ 



' J y 



/ 



J 





1 





J 





GAP E ^ 





'^ ^ 



-^ 







y 





GEOMETRIC 



SHADOW 







\^ 



^. 

















DIRECTION OF 

 INCIDENT wave' 



4 









\ 



\ 













K' = 0.2 



^ 



6 

 8 













\ 



\ 



V 

























K'=0.l 









; 



I '■ 



\ i 



5 E 



) l( 



3 1 



2 I' 



i 1 



5 l« 



J 20 



y/L 



CONTOURS OF EQUAL DIFFRACTION COEFFICIENT 

 GAP WIDTH = I WAVE LENGTH (B/L = I) 



Fig. 23 

 DIFFRACTION OF WAVES AT A BREAKWATER GAP 



34 



