



Run o0509a 





°1 





Gage I 









Hmo - 0.08 





5 2i 





Hl/3 - 0.08 





e : 









X 









£ T 









— o-= 

















3) : 









CD 









go, 









ID ~* : 









T 









— 



0.0 0.2 0.4 0.6 0.8 



1.0 1.2 



I 

 1.4 



0-. 



frequency (hz) 



Low pass 









Hmo - 0.07 





S T o, 





Hl/3 - 0.07 





^ — • : 









e : 









X 









E T 









— 0-3 



1 















35 : 









OT 









C °1 









<D rt = 









? 









— 



0.0 0.2 0.4 0.6 0.8 



1.0 1.2 



1.4 



"o-= 



frequency (hz) 



high pass 









Hmo - 0.04 







A A 1 . 



Hl/3 - 0.06 





e : 



. yUi it i 







X 



iJiifMLmMflfl/i i 







£ T 



wPlilulrilHihd . 







— o-= 



/» ' i U irLflW L,i 









I ' I WfIUUAMi ■ i 







3) : 



WlfiuM 1 Ad 1 1 1 1 







CD 



■ "1 |»|WW™AUm»Mu 







c » - 



Jo, 



f ' I nf||frj% 



ykAl l/ltllim i. 



1 



0) *"" : 





^HMWii 



iH 



f 



1 



i • U'||f ' U f y 







0.0 0.2 0.4 0.6 0.8 

 frequency (hz) 



i i 

 1.0 1.2 



1 

 1.4 



Figure 4-6. Smoothed wave spectra from Gauge I, Run A0509A 



files were transferred, the bed eroded 10.0 cm, and, at the end of the wave 

 run, the sand bed eroded 13.5 cm at this location. 



The wave record in Figure 4-5 is fairly typical of gauges that were located 

 landward of the still-water shoreline. As shown in Figure 4-5, the first swash 

 event to reach Gauge I occurred after about 77 sec of data recording. Swash 

 events occur intermittently and depend on the group structure of the incident 

 high- and low-frequency waves. Comparison of Figure 4-5 with Figure 4-3 

 indicates that the first swash event corresponds to the first large wave group 



88 



Chapter 4 SUPERTANK Swash Measurements 



