changes in the western half of the harbor have virtually no effect on the existing 

 pier areas. 



An even more concise description of (A^^at each basin can be obtained by 

 considering wave climate as well. A climate-based amplification factor is 

 calculated for each basin as 



N T N n 



N, 



( A am[)clmuuc £s Is (( A any)cff )j* ~7j (30) 



M *=1 ^ total 



where 



jk = indices denoting they'" 1 period interval and Id* direction interval, 

 where the intervals are based on the incident wave conditions in 

 Table 15 



(( A amp)<ff)jk = spectral amplification factor for they" 1 period and if* direction 



N jk = number of array records with T p and 6 m in they'" 1 and k A period 

 and direction intervals 



Nutai = total number of records from the array gage 



This climate-based amplification factor is given in Appendix F for every basin 

 and harbor plan. Array data used in the calculation were from Nov 93 - Sep 94, 

 as discussed in Chapter 2. 



One complication which arose during the wind wave and swell studies was 

 inconsistent results at the boat ramp (Basin 21) between some of the plans. After 

 investigation, it was discovered that bottom friction has a signficant effect at this 

 location because of the expanse of very shallow water approaching it Rough 

 correction factors were developed from a small number of runs with /5M3.032 and 

 applied to Basin 21 for all plans. Results presented here include that correction. 



Evaluation Against Operational Criteria for Wind 

 Waves and Swell 



Standard operational criteria used by the U.S. Army Corps of Engineers 

 (USACE) for wind waves and swell in shallow draft harbors are: 



a. Wave height in berthing areas will not exceed 1 ft more than 10 percent of 

 the time. 



b. Wave height in entrance and access channels and turning basins will not 

 exceed 2 ft more than 10 percent of the time. 



Chapter 5 Harbor Response to Wind Waves and Swell 71 



