DUCK94 Sediments


During DUCK94 sediment samples were collected using a clamshell grabber along three profile lines in August and October 1994. The samples were sieved using a sonic sifter at quarter-phi ( phi) intervals, ranging from -3 phi (8.0 mm) to 4.25 phi (0.53 mm), and weight percentages for each interval were computed.

Donald K. Stauble and Mary A. Cialone analyzed and presented the sediment data taken during October. Their presentation, 'Sediment Dynamics and Profile Interactions: DUCK94', was printed in Coastal Engineering 1996 - Proceedings of the twenty-fifth international conference, Vol. 4, copyright 1997 by the ASCE. The following is the abstract from that paper and the paper in PDF format (700K) can be obtained here. You need a PDF reader to view this document - a free Adobe Acrobat Reader can be obtained here.


Donald K. Stauble and Mary A. Cialone


Beach profiles and sediment samples were collected on a daily basis along three cross-shore transect lines during the DUCK94 nearshore experiment lasting for 18 days in October 1994. Conditions ranged from near calm during the first week of the experiment to full storm conditions during the second and third weeks, with a two day initiation of beach recovery at the end of the experiment. The profiles responded with similar elevation change, with little morphologic variability during the calm period. During the storm, the bar migrated seaward 70 to 100 m, but the foreshore exhibited little change. The bar began to migrate shoreward at initiation of recovery. Sediment grain-size distributions vary in the cross-shore direction, with medium size grains on the upper foreshore, coarse gravel deposits on the lower foreshore and progressively finer sands in the offshore direction. After the storm, the foreshore and bar/trough samples were coarser with little change in the nearshore sediment distributions.


Here is a picture of Don Stauble hard at work with all that sand.




The highlighted lines in the following DUCK94 mini-grid plots show which profile lines the sediment samples were taken along. The tables that follow them show exactly what data is available for August and October 1994. 

Each sediment sample is given a unique 8-character 'sample number'. The first three characters show which profile line the sample was taken from. The next three characters actually number the sample (August data starts with 10 on 8/4 and increases by increments of 5 each day, October data starts with 110 and increases by increments of 10 each day). The last two characters describe the location along the profile, which is shown here. The location for each sample is given in meters in local the FRF coordinate system. All elevations are relative to the National Geodetic Vertical Datum (NGVD) of 1929.


DB - Dune Base

MB - Mid Berm

HT - High Tide Mark

MT - Mid Tide Mark

LT - Low Tide Mark

TR - Bar Trough

BC - Bar Crest

- # - Depth , m, NGVD



The data is presented in three formats:

  1. Print format - These text files give all the information calculated for each of the samples (location, phi & mm %, wentoworth %, unified %, trask values, moment and folk statistics, etc.). These are good for viewing all the statistics for one sample on a single page. d94aug.prn (512K) d94oct.prn (636K)
  2. Tab-deliminated - These text files show the same data but the samples are arranged in tab-deliminated rows. These are good for opening into a spreadsheet. d94aug.txt (65K) d94oct.txt (80K)
  3. Data files - The following are text files of the raw data with phi scale percents calculated but nothing is labeled. This text file that will explain the format. These data files are good for reading with your own Fortran, C, Pascal, etc. program. d94aug.dat (136K) d94oct.dat (165K)






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