Test Procedures and Calculations 



Incident wave conditions 



A range of short and long wave conditions incident to Kahului Harbor was 

 considered. A representative range of wave periods and directions which could 

 cause damaging waves inside the harbor was included, based on field measure- 

 ments. 



The short wave periods and 

 approach directions considered are 

 given in Table 15. These conditions 

 provide reasonable coverage of the 

 field measurements summarized in 

 Figures 18 and 19. The shortest 

 wave period, representative of strong 

 local storms, is 2 sec shorter than the 

 grid design period. Past experience 

 has shown that the model still 

 provides adequate results for small 

 increments below the grid design 

 period. The longest period represents 

 a very long swell condition. Direc- 

 tions were chosen to include likely 

 approach directions to the harbor 

 entrance and to give adequate repre- 

 sentation of the directional spectrum 

 in post-processing. They were also 

 chosen after review of directional 

 response sensitivity runs at a selected 

 swell period. Test directions were 

 reckoned in 1 1-deg increments 

 beginning with 192 deg (coming 



from, relative to true north). Incident wave directions and the angular orientation 

 of the seaward semicircular model boundary are illustrated in Figure 45. 



For the study of existing harbor conditions and comparison of alternatives, 

 HARBD was run with the full set of short wave periods and directions in all 

 possible combinations. Model results were then evaluated for directional spectra 

 with T p and 6 m values equivalent to the period and direction values used in the 

 initial HARBD runs (Table 15). 



Table 15 



Summary of Incident Short 



Wave Conditions 



Wave Period 

 (sec) 



Wave Direction 

 (deg, going toward) 



8 



17 



192 



9 



18 



203 



10 



19 



214 



11 



20 



225 



12 



21 



236 



13 



22 





14 



23 





15 



24 





16 







Chapter 4 Numerical Model 



61 



