distribution examples from the nearshore group showing a well- sorted unimodal 

 distribution prevalent at all stations from 11 to 17. This group had the 

 least variability during the study period. Since all the distributions were 

 similar, only examples from Stations 12, 15, and 17 are shown. Each station 

 exhibited a small tail of fine-grained sand in the 0.074 mm (3.75 <j>) range. 

 The profile elevation below NGVD ranged from around -4 m at Station 11 to -8m 

 at Station 17. The grain-size data suggest that the environment of deposition 

 was relatively uniform over the entire 16 -month length of the study. 



41. Figure 19 shows the distribution of mean grain size and sorting 

 values from the nearshore group. There is very little variation in the 

 tightly packed groupings when compared with the more active swash and wave 

 breaker zone groups of the beach and bar/trough. A slight shift in means can 

 be seen from around 0.165 mm (2.6 <j>) at Station 11 to around 0.117 mm (3.1 <j>) 

 at Station 17. The sorting range decreases as one moves offshore into deeper 

 water with samples being more well sorted. The data points with the "poorest" 

 sorting and "coarsest" mean grain size were collected after storm events, 

 indicating some active transport under extreme events. The variation in depo- 

 sition and resulting grain-size distributions, however, decreases with 

 increasing depth. 



42. Combining the individual mean grain-size and sorting values into 

 the four groups shows the relationship of the cross -shore change in sediment 

 data (Figure 20) . The coarser and more poorly sorted sediment distributions 

 occurred during the winter months at the beginning of the study. The coarsest 

 and most poorly sorted samples in all groups correspond to the first sampling 

 day on 20 March 1984. This survey was taken after a series of high wave 

 events when the bar was in one of its farthermost positions seaward of the 

 baseline. Samples collected in October 1984 also exhibited coarse and more 

 poorly sorted distributions after the largest waves that were measured during 

 the study period. The widest spread in data was seen in the beach group. The 

 next widest spread was in the bar/trough group. The tightest grouping was 

 found in the dune and the nearshore groups. Each of these groups were in 

 lower energy environments and thus showed less variation in grain- size 

 distribution. 



51 



