Table 6 

 Volume Changes-Sediment Trap 



Time Period 

 May 81 -Sep 81 

 Sep 81 -Dec 81 

 Dec 81 -Sep 82 

 Sep 82-Jul 83 

 Jul 83-May 84 



Months 



4 



3 



9 

 10 

 10 



Volume Change 

 cu yd 



+53,600 



+42,100 



+50,200 



+67,200 



+56,900 



Cumulative 



Volume Change 



cu yd 



+53,600 



+95,700 



+145,900 



+213,100 



+270,000 



Rate of 



Volume Change 



cu yd /month 



+13,400 



+14,000 



+5,600 



+6,700 



+5,700 



Table 7 

 Inlet Tidal Current and Discharge Measurement 



Date 



22 Apr 81 



11 Jun 81 



20 Dec 81 



8 Sep 82 



Tide 



Range* 



ft 



3.21 



3.77 



2.51 



3.5tt 



Flow 

 Cross- 

 Sectional 

 Area 

 sq ft 



8,706 



13,504 



12,544 



12,803 



Tidal Prism** 

 cu ft 



Flood 



3.21 x 10° 



3.47 x 10 8 



1.21 x 10 8 f 



3.04 x 10 8 



Ebb 



3.01 

 2.36 

 2.13 

 2.26 



10 c 

 10* 

 10* 

 10* 



Average 

 Maximum 



Velocities 

 fps 



Flood Ebb 



2.38 

 1.47 

 0.78 

 1.55 



2.47 

 1.29 

 1.04 

 1.40 



* Tide range measured at Carolina Inlet Marina. 

 ** Discharge measurements made in trap area, 

 f Relatively small flood-tidal prism apparently due to high water on this 

 date being about 1 ft lower than high water on the other dates, 

 ft Marina gage out of order, tide range estimated from ocean tide range mea- 

 sured at Center Fishing Pier. 



