Calculating Composite Samples for PHI Sediment Data
To calculate a composite sample, have the Sediment sample theme active and
the specific desired samples selected. Click on the Grain Size Frequency Analysis
button (Figure 6-2). An option choice menu will be displayed; choose either
Calculate Composite Sample (Cumulative Plot) or Calculate Composite Sample
(Frequency Plot) (Figure 6-3). A composite sample will be created in the composite
table and the composite sample will be plotted. If the cumulative plot choice was
selected, then a cumulative frequency weight percent plot will be generated. If the
frequency plot choice was selected, then a frequency weight histogram plo t will be
generated. The plot routines will follow the procedures described in the previous
sections.
Comparing Composites for PHI Sediment data with
Reference Curve
To calculate the adjust fill factor (RA) and the renourishment
factor (RJ) open the composite analysis table. Then, click on the
Perform Composite Analysis tool (Figure 6-7). The user is
prompted to select the composite sample (record) in the
table to calculate the RA and RJ. Click on the desired
record. The user is prompted for the reference PHI 16 and Figure 6-7. Perform
composite analysis tool
PHI 84. Enter the reference PHIs. If the user knows the
reference mean and sorting in PHI, then press cancel, and
be prompted for the mean-PHI and the sorting-PHI. The RA and RJ are calculated
and applied to the respective fields. See Figure 6-8 for an example of the table. See
CETN-II-15 (1986)1 for a discussion of the factors.
Figure 6-8. Composite sample table with RA and RJ factors
Importing Other Sediment Data
To import other sediment sample data, click on the Import/Plot Sediment Data
on the HyPAS menu (Figure 6-8). HyPAS Displays the Sediment Data Options
menu (Figure 6-9). Choose Import CoulterLS Particle Analyzer File(s) to import
data from the Coulter LS Particle Sizer. Choose Import Sieve Samples for sieve
data.
1
Hands, E.B. and Chu, Y. (1986). "Overfill and renourishment factors," Coastal Engineering
Technical Note CETN-II-15, U.S. Army Research and Development Center, Coastal and
Hydraulics Laboratory, Vicksburg, MS, http://chl.wes.army.mil/library/publications/cetn/
6-4
Chapter 6 Sediment Sample Analysis
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