Run s0311o 

 Gage 6 

 .mean - 0.00 



l 



Iml 



iLil 



iliklwll 



|J^^ 



ipPn| 



1 



m 





(flWnTp 



nlPPT» 



973.0 

 TLmo (sec) 



Figure 3-3. Time series of raw and low-pass water surface elevation 

 for Gauge 6, Run S0311A 



series, as would be expected with the relatively narrow incident spectrum 

 (7 = 20). 



Smoothed spectra for the raw, low-pass, and high-pass signals for 

 Gauge 6, Run S0311A are given in Figure 3-5. For this example, the spectral 

 peak is located at 0.34 Hz (2.9 sec) and higher harmonics are apparent at 

 approximately 0.7 and 1.0 Hz. A low-frequency peak at 0.04 Hz (23 sec) is 

 also apparent. At Gauge 6, 96 percent of the wave energy is contained in the 

 high-pass signal and only 4 percent in the low-pass signal. The energy in the 

 low-pass signal tends to increase closer to shore. 



Chapter 3 SUPERTANK Hydrodynamics 



67 



