PART III: SEDIMENT DATA 



9. Surface grab sediment samples were collected across 21 of the pro- 

 files during the study period. On the subaerial beach, sediment was collected 

 from the surface at selected sites along the profile. Most of the sampling 

 was done concurrent with the profile survey. On rare occasions, the sediment 

 was collected 1 day after the profile. The subaqueous samples (below wading 

 depth) were collected from the CRAB with the use of a Ponar Grab Sampler. 

 Approximately 100 to 200 g of sample was collected by both methods and bagged 

 for laboratory analysis. 



10. The distribution of sample stations for each profile is shown on 

 Figure 4 along with the profile. Samples were not taken on every profile 

 survey. Samples were first collected on 20 March 1984, but were not collected 

 on a regular basis until 11 August 1984. After that point, samples were col- 

 lected about once a month for the next 13 months, with more frequent collec- 

 tion bracketing storms or other periods of profile change. 



11. Sediment sampling stations consisted of two locations in the dune 

 area, four on the berm and intertidal area, four in the region of the inner 

 bar and trough area, and seven in the nearshore area from the seaward edge of 

 the inner bar to the limit of the profile. Except for the 11 August 1984 

 survey, when no samples below NGVD were collected, this sampling scheme was 

 followed. Occasional sample stations were not collected during the study 

 period for various reasons. A total of 316 individual samples were collected 

 and analyzed. 



12. Laboratory procedures consisted of washing each sample to remove 

 salt content and oven drying and splitting the sample down to approximately 

 20 g. Since the FRF beach is a high-energy open ocean beach, little fine- 

 grained silt and clay material was deposited. Therefore, less than 5 percent 

 of any sample contained silt-size material, and no fine-grained size analysis 

 was needed. The dried, split sample was sieved using a sonic sifter with 

 1/4-phi ($) interval nest of sieves (Underwood 1988) . Table 2 shows the com- 

 parison of standard sieve mesh numbers, millimetre and phi units, along with 

 the Unified Soils and Wentworth Classifications to aid the reader in interpre- 

 tation of the sediment data. 



13. Grain-size distributions and sediment statistics were calculated 

 using the Interactive Sediment Analysis Program (ISAP) , as described in Anders 



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