During SandyDuck sediment samples were collected in the
surf zone using short diver-collected tube cores. These samples
were collected near instruments where the locations were
known and repeatable. Foreshore grab samples were also
collected along the same instrument lines. The samples were
sieved using a sonic sifter at quarter-phi intervals, ranging
from -3 phi (8.0 mm) to 4.25 phi (0.53 mm), and weight
percentages for each interval were computed.
Data
Each sediment sample is given a unique sample number which
appears in the sediment data files and adheres to the followingscheme:
Location (2 to 4 characters); Month ('s' for September
or 'o' for October ); Day (1 or 2 characters). Sample 'Locations'
are given in this text file. The locations refer to FRF local
coordinates and/or to the instrument frame at that location. For
example b11s1 refers to the sample collected at FRF
cross-shore/longshore coordinates 385.0/827.5 (next to instrument location: spuv62) on September 1, 1997. Labeled blue
circles in this contour plot of the SandyDuck mini-grid area show where samples were collected within the minigrid area.
The data are available in three formats:
- Print format - These text files give all the information calculated for each of the samples (location, distribution by 1/4 phi
interval, Wentworth and Unified system %, moment and folk statistics in phi and mm, etc.). These are good for viewing all
the statistics for one sample on a single page. sd-sed.prn (265K)
- Tab-delimited - These text files show the same data but the samples are arranged in tab-delimited rows, one row per sample
with a multi-row header. These are good for opening into programs that require columnar data. sd-sed.txt (40K)
- Data files - The raw data file uses an 80 character multi-line record for each sample according to the format described Here.
This format is good for use with your own Fortran, C, Pascal, etc. program. sd-sed.dat (76K)
Credits
The sampling program was led by J. Bailey Smith. Samples were collected by JB Smith, Rebecca Beavers, Steve Elgar, Britt
Raubenheimer, Alex Hay and others. Volunteers from the Corps of Engineers and the Virginia Institute of Marine Science
collected the beach samples and processed and analyzed all them. This group included Wendy Thompson, Arno de Kruif, Daan
Rijks, Chuck Mesa, Lihwa Lin, Jonas White, Lyle Thompson. The picture above shows Danny Otero, a contract student from
Florida Tech, working hard in the sediment lab. Mel Pollock (NCSU) also helped to re-analyze samples.
(this page and final data formats created by David Thompson, July 1998)
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