0.14ft 1 - 50 + 0.70 



X. 



(92) 



This implies that either surf similarity parameter may be used. Equations 91 

 and 92 give good indications of the trend; however, variability in the data is 

 large. From observations of the video recordings, splash distance appeared to 

 be a function of not only breaker type, but also of the angle at which the 

 plunging wave entered the water column. 



Penetration Distance 



150. A wave crest continues to travel shoreward upon entering the water 

 column until its forward momentum ceases. The penetration distance X t was 

 defined as the total travel distance of the wave crest from the break point. 

 Values of X t were estimated from videotape by observing the maximum forward 

 travel of bubbles caused by the turbulence of the wave crest plunging into the 

 water column. Figure 51 shows penetration distance normalized by breaking 



8.0 



Xt/Hb 



0.0 0.5 1.0 



Figure 51. X t /H b as a function of ft 



1.5 2.0 2.5 3.0 3.5 



4 



104 



