Table 2 



Summary Statistics, NDBC Buoy 51026, N. Molokai 



Statistical Parameter 



NDBC Buoy 51026' 



WIS Station 31 



Mean H s (ft) 



8.5 



8.2 



Standard deviation of H s (ft) 



2.6 



3.0 



Mean T p (sec) 



10.7 



9.3 



Standard deviation of T p (sec) 



2.9 



2.6 



Most frequent direction (deg coming from) 



90 



45 



Maximum H s (ft) 

 Associated 7), (sec) 

 Associated direction (deg coming from) 



23.9 

 16.7 

 344 



23.3 

 10.0 

 196 



Percent occurrence, period>18.2 sec 



1.2 



0.0 



Percent occurrence, period>l5.4 sec 



7.7 



0.4 



1 Data from Jan 93 through Feb 96 



MEAN WAVE HEIGHT 



I 



1 



LEGEND 



,* 





*. 



0.78 M. 



/ ^k 





yyyzwfyZ"--.. 



1.57 M. 



"" 2"5§"m" 



3.13 M. 



PERCENTAGE 



i if 



^B 



v//aM^L'-- 



OF SAMPLES 



0-02% I 1 



2-10% tr7~A 



10-15% mm 



w : -^"""^P 





^4i B : F 



> 15% MB 



S 







Figure 11. Wave rose, NDBC buoy 51026, N. Molokai 



the harbor at those other times results from lack of problems, or failure of 

 problems to be observed/documented. Thus, a simple, quantifiable threshold for 

 allowable infragravity energy was not determined. Additional measurements 



Chapter 2 Field Wave Measurements 



13 



