UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE(Tt7i«n Data Bntend) 



samples away from the bottom, but near-bottom concentration was higher than 

 the extrapolated log trend. Concentration increased as local height-to- 

 depth ratio increased, to a maximum near the theoretically predicted maxi- 

 mum height-to-depth ratio. Plunging breakers appear to suspend more 

 sediment than spilling breakers. Median sand size at Ventnor ranged from 

 0.12 to 0.15 millimeter and at Nags Head averaged about 0.21 millimeter. 

 The median size of suspended-sediment samples was lower than bottom samples, 

 Potential applications, including an example on longshore transport, are 

 discussed. The results of this report are based on a total of 850 samples, 

 each pumped for 2.5 to 3 minutes and more than half collected in the 0.2 to 

 0.5 foot range above the bottom. 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGEfmien Data Entered) 



