UNCLASSIFIED 
SECURITY CLASSIFICATION OF THIS PAGE (When Date Entered) 
REPORT DOCUMENTATION PAGE 
1. REPORT NUMBER 2. GOVT ACCESSION NO.| 3. RECIPIENT'S CATALOG NUMBER 
TR. 774 
4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED 
SEDIMENT SUSPENSION AND TURBULENCE IN AN 
OSCILLATING FLUME Technical Paper 
6. PERFORMING ORG. REPORT NUMBER 
HEL 2-39 
7. AUTHOR(s) 8. CONTRACT OR GRANT NUMBER(s) 
Thomas C. MacDonald DACW7 2-71-C-0024 
9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT, PROJECT, TASK 
1 1 i H AREA & WOR Ti 
University of California ORK UNIT NUMBERS 
Hydraulic Engineering Laboratory 
Berkeley, California ~94720 D31193 
CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE 
Department of the Army April 1977 
Coastal Engineering Research Center (CERRE-CP) 13. NUMBER OF PAGES 
Kingman Building, Fort Belvoir, Virginia 22060 
- MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 15. SECURITY CLASS. (of this report) 
UNCLASSIFIED 
15a, DECL ASSIFICATION/ DOWNGRADING 
SCHEDULE 
DISTRIBUTION STATEMENT (of this Report) 
Approved for public release; distribution unlimited. 
DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) 
SUPPLEMENTARY NOTES 
KEY WORDS (Continue on reverse side if necessary and identify by block number) 
Oscillating flume Sediment suspension Turbulence Waves 
20. ABSTRACT (Continue on reverse side if necesaary and identify by block number) 
An experimental study measured suspended-sediment concentrations and tur- 
bulence above the bottom of a specially designed oscillating flume. A total 
of 73 concentration distributions was measured for a single fixed-bottom 
roughness and the same specific gravity (1.25) of sediment. Three different 
sediment sizes were used, 65 experiments with the same size, These experi- 
ments show a simple exponential distribution, except near the bottom, as 
previously found by other investigators. The slope of the concentration 
Continued 
DD en, 1473  Evrtion oF 1 Nov 65 1s OBSOLETE UNCLASSIFIED 
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