Sediment Results 



All samples were sieved at quarter-phi QA cp) intervals. Sediment statistics were 

 calculated using the method of moments (Friedman and Sanders 1978). Mean 

 (the average grain size) and standard deviation (a measure of uniformity or sorting 

 of the sediment) values were calculated for each sediment sample. Ponce de Leon 

 Inlet had a narrow range of mean grain sizes, most centered in the fme sand range, 

 with little shell and no gravel size components. Most of these samples were well 

 sorted and the mean and median were similar. Only the few coarser sand samples 

 generally had poorer sorting. Samples from the flood and ebb shoals were 

 relatively finer than the throat and flood channels, and most of the beach samples. 

 For the flood and ebb shoals, the average mean grain size was around 0.15 mm 

 (2.70 (p), for the throat and flood channels and beaches, around 0. 18 mm (2.45 cp). 

 A few low tide samples and the south flood channel (SFC3) sample contained 

 shells and shell fragments and were substantially coarser (up to 0.42 mm, 1.26 (p). 

 Figure 70 shows the sample locations. Table 7 lists data on sample location and 

 sediment statistics. Further details on sediment analysis can be found in Stauble 

 and Cialone (1997). 



58 Chapter 3 Example Results and Discussion 



