



Run e0311a 



"o-s 





Gage 6 







Hmo - 0.63 





iff S 



Hl/3 - 0.67 



e : 







X 







E V 







— O-. 













3) : 







O) 







8 Si 







T 







2 



0.0 0.2 0.4 0.6 0.8 



i i i 



1.0 1.2 1.4 



°°-a 



Frequency (Hz) 



Low Pass 













Hmo - 0.12 



N V-, 





Hl/3 - 0.11 



e : 







X 



HI 





E V 



n i 





— O. 



A 







■ 





3) : 



M Wll . 





O) 



r V lA 





L. r> ■ 



iBu. 





go, 



n 





LJ *"■ : 



\ 





T 



i 





° 



i i i ■ 



0.0 0.2 0.4 0.6 0.8 



i i i 



1.0 1.2 1.4 



°0-! 



Frequency (Hz) 



HLgh Pass 







Hmo - 0.62 



v. " : 



iff S 



Hl/3 - 0.67 



e : 







X 







E ? 







— Oi 













3) 







O) 







L n " 







g'o, 







CJ *"■ : 









3.0 0.2 0.4 0.6 0.8 



Frequency (Hz) 



i i i 



1.0 1.2 1.4 



Figure 3-5. Wave spectra for the raw, low-pass, and high-pass water 

 surface elevation for Gauge 16, Run S031 1 A 



offshore, the positive (offshore) velocities correspond to the passage of a wave 

 trough (negative elevations), and the negative (onshore) velocities correspond 

 to the passage of a wave crest (positive elevations). The mean velocity at this 

 gauge was 0.13 m/sec, directed offshore. The energy spectrum of the veloci- 

 ty is similar to the wave spectrum in Figure 3-5. The primary peak is at 

 0.33 Hz with harmonics at 0.7 Hz and 1.0 Hz. Approximately 14 percent of 

 the energy is contained in the low-pass signal (the current meter is located 

 24 ft shoreward of wave measurement at Gauge 6) and the low-frequency 

 peak is at 0.02 Hz (50 sec). 



Chapter 3 SUPERTANK Hydrodynamics 



69 



