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SandyDuck '97 Sediments
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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.


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:

  1. 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)
  2. 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)
  3. 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)


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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