54. Suh and Dalrymple ' s relationship predicts salient lengths X^ 

 (Equation 42) equal to 72 and 39 m using project parameters obtained from the 

 Diffraction Energy and JMC methods, respectively. These values differ from 

 the design salient length (X^ =26 m) used for both the Diffraction Energy and 

 JMC methods. However, using an average distance offshore for Toyoshima's 

 method X = 29 m results in a predicted salient length equal to 24 m, very 

 close to the prototype response. 



55. Harris and Herbich's (1986) relationship for salient volume (Equa- 

 tion 45) predicted the largest volume of salient accretion if structural pa- 

 rameters obtained from the Diffraction Energy method (4,200 m^) were used, 

 followed by Toyoshima's median-depth system (3,300 m^) (using an average dis- 

 tance offshore equal to 29 m) , then by the JMC method (540 m^) . Since the 

 values of L /X are less than or approximately equal to 0.8, Seiji, Uda, and 

 Tanaka's (1987) ranges to predict gap erosion (Equations 30 through 32) indi- 

 cate that only a slight possibility for gap erosion exists for all sets of 

 structural parameters. 



37 



