Xs/Hb 



0.0 0.5 



Figure 48. X s /H b as a function of £ 



plane-sloped beaches. Values of Xp/X s tended to be greater for smaller 

 £ -values as shown in Figure 49. Plunge distance was also longer for smaller 

 values of £ , which may explain this trend. The dashed line in Figure 49 

 represents the empirical relation of Galvin (1968) , and the solid line is 

 given by the following visually fit equation 



Xp 



0.14&; 1 - 50 + 0.70 



(91) 



for 0.29 < £ < 3.46 . Figure 50 shows Xp/X s as a function of £ b , with 

 the empirical equation of Galvin shown by the dashed line. The solid line was 

 visually fit to the data and is identical to Equation 91 with £ b substituted 

 for £ , for 0.31 < £ b < 2.74 . Equation 91 may be rewritten as: 



102 



