Table 5. Evaluation of equivalent rectangular breakwater. 



Layer, j 



Ah. 

 ,-1 

 h 







inches 



inches 



^3 

 inches 



inches 



Ah. 



^° 6„ 1/2 



n "^r 



^- u .-1/2 

 (mchesj 



I 



1 

 14 



16.7 











8.35 



0.0247 

 0.0700 

 0.0376 

 0.0366 

 0.0130 



II 



4 

 14 



15.0 



9.2 







16.7 



III 



3 

 14 



15.1 



13.8 



5.6 



32.6 



IV 



4 

 14 







29.7 



15.6 



60.9 



V 



2 

 14 











60.7 



121.4 



E 0.1819 

 J 



by equation (163) for the choice AHg/AH-p = 1. Furthermore, the 

 trapezoidal breakwater shown in Figure 25 has a seaward slope of 

 1 on 1.5 (tanSg = 0.667) which for the most part consists of stones of 

 d = djj = 1.5 inches (3.8 centimeters). These slope characteristics 

 correspond to those assumed in the numerical example presented in 

 Section III, Table 4. 



The present numerical example of the determination of the 

 hydraulically equivalent breakwater together with the numerical examples 

 presented in Sections II and III therefore constitute an example of the 

 computations involved in the procedure described in Section IV . 1 for 

 the determination of the reflection and transmission coefficients of 

 the trapezoidal, multilayered breakwater shown in Figure 25. 



89 



