energy does enter the bays properly, and the marigrams calculated within 

 Pamlico and Albemarle Sounds (Plate 3) agree with the information in the tide 

 tables. While the NOAA tide tables do not list highs and lows for the bays, 

 they note that "In Albemarle and Pamlico Sounds, except rear the ir.-ets, the 

 periodic tide has a mean range less than one-half foot'' (p. 226, 1962 Tide 

 Tables). 



33. After calibration of the offshore model with the March 1962 tide, 

 boundary conditions were developed to simulate the predicted tides ior Hur- 

 ricane Dcnna. The starting time of this ';imulacion was noon CMT on il Septem- 

 ber 1960, and WIFM computed 33 lir of tides with a 3-min time-step. The bound- 

 ary refinement process was cycled through again, but no minor parareters w^re 

 changed in WIFM. PJate 4 show;- that the ^ompvited air-.pl i tudes at Cape Fear fail 

 about 1 ft below predictions. This result comes as a compromise: when 

 boundary amplitudtj were increased in Lhe offshore model near Cape Fear to 

 raise the computed peaks, the tide rang." tbroug.iout '..he model became too larg-: 

 to match predictions at other statlonp. t'la.'fs 5 and 6 compare computations 

 with predictions for c-chrr stations along th^ Outer Banks and illustrate the 

 tides within the bays. As with the March 19b2 tide, rhest plates show agree- 

 ment at Virginia Beach and Turricuck, local mcreises at the inlets, and the 

 proper tides within the bays. 



Nearsh ore Model 



34. The calibration of the nearshore model was £;crmplished using 

 constituent tide data resulting; from harmonic aii^iysis o.: gige records at 

 lA stations within the grid coverage. Although no data collection was per- 

 formed for this study, data from ;,reviou£i collection efforts were available at 

 10 stations in the vicinity of Orep,on Inlet, and these were supplemented by 

 NOAA data at four additional open-coast locations. Because of its predomi- 

 nance, the M,. (lonar-seinidiurnai) constituent was selected as a representative 

 parameter for model calibration. A summary of gage locations with M^ ampli- 

 tudes and epochs Is presented in Table 1. Gage locations are depicted in 

 Figures 7 and 8. 



35. Initial efforts at calibrating the nearshore model were performed 

 using a mean tide from January 1981. First estimates for bathymetry and open 

 boundary adjustments were determined using this simulation period. Grid 



23 • 



