Table 4 presents the Dynamic Shape Factor for samples from the 3rd 

 Street transect. These were computed using Equation 8. The average DSF 

 for the transect is 0.57 (S = 0.03). It was not possible to correlate 

 this DSF value to our calculated S.F. of 0.7 using the regression formula 

 for mixed Zingg groups given by Briggs, et al. (1962). Their equation, 



DSF = 1.37 S.F. - 0.08 (22) 



resulted in a DSF = 0.87 when S.F. = 0.7 was introduced into the equation 

 and a S.F. = 0.47 when DSF = 0.57 was used. The discrepancy is more than 

 likely due to the apparent use by Briggs, et al. (1962) of correction 

 factors for S.F., as stated previously. It was impossible to ascertain 

 these correction factors or their use from the data available. However, 

 comparison of Reynolds number (R p ) back calculated using Equation 21 

 (Table 4), with the Re computed for the same data using Equation 2 (Table 

 5) shows that they are very close. Thus, computations using either the 

 Corey Shape Factor or the Dynamic Shape Factor yield almost identical 

 Reynolds numbers values. 



Size Analysis 



Table 5 summarizes the data on size parameters for each of the samples 

 collected. Figures 7, 8, and 9 graphically depict trends in values for the 

 parameters. It is to be noted that the mean and median nominal diameters 

 are very close in value in all transects. In all, the shoaling zone 

 presents a more or less constant mean size throughout its extent. There is 

 an abrupt increase in mean size in the breaker zone with a subsequent in- 

 crease thereon inshore into the swash-berm zone. Nevertheless, some 

 interesting differences in the distribution of mean size along the three 

 transects are noticed. The greatest increase at the breaker zone is found 

 at the 15th Street pier transect, while the smallest increase is found at 

 the 3rd Street transect. The Pendleton Line transect presents an inter- 

 mediate increase. However, the 15th Street transect shows the smallest 

 mean size at the swash-berm zone with sizes much smaller than those at the 

 breakers, while the 3rd Street transect evidences the greatest increase in 

 mean size between the breaker and swash-berm zones with the swash-berm 

 sizes much larger than those both at the breakers and at the swash-berm 

 zoTle at the 15th Street transect. The Pendleton Line transect shows a 

 pattern similar to that of the 3rd Street pier transect, but the largest 

 mean size at the swash-berm zone is approximately the same as in the 

 breakers. 



The curves for sorting show the poorest sorting in the breaker zone 

 at the 15th Street transect and Pendleton Line transect, but not at the 

 3rd Street transect. In the latter, sorting is relatively uniform through- 

 out the length of the transect, with the poorest sorting found at the 

 halfway point in the shoaling zone. The best sorting is found in all 

 transects generally just inshore of the breaker zone, with good sorting 

 present near the top of the swash-berm zone. 



12 



