Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704 -0188
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2. REPORT TYPE
1. REPORT DATE (DD-MM-YYYY)
3. DATES COVERED (From - To)
Final report
July 2003
4. TITLE AND SUBTITLE
5a. CONTRACT NUMBER
Flow Table Study of Cook Inlet, Alaska
5b. GRANT NUMBER
5c. PROGRAM ELEMENT NUMBER
6. AUTHOR(S)
5d. PROJECT NUMBER
Steven A. Hughes, Gian-Marco Pizzo
5e. TASK NUMBER
5f. WORK UNIT NUMBER
32935
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION REPORT
NUMBER
U.S. Army Engineer Research and Development Center
ERDC/CHL TR-03-6
3909 Halls Ferry Road, Vicksburg, MS 39180-6199;
Department of Civil and Environmental Engineering
University of California at Berkeley, Berkeley, CA 34720
9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSOR/MONITOR'S ACRONYM(S)
U.S. Army Corps of Engineers
11. SPONSOR/MONITOR'S REPORT
Washington, DC 20314-1000
NUMBER(S)
12. DISTRIBUTION / AVAILABILITY STATEMENT
Approved for public release; distribution is unlimited.
13. SUPPLEMENTARY NOTES
14. ABSTRACT
Complex flow patterns in upper Cook Inlet in the vicinity of the Port of Anchorage were simulated using a flow table. Initially, two
idealized models of the inlet were constructed with terraced layers representing the bathymetry. Encouraging test results prompted
construction of a model with three-dimensional bathymetry. Both ebb and flood maximum tide flows could be examined by reversing
the models on the flow table. The intriguing flow patterns of Cook Inlet were visualized using floating particles and by dye injectio n.
Strong horizontal and vertical mixing was evident through the model, particularly in the lee of headlands. The flow table models
indicated that deposition of fine sediment at the Port of Anchorage may be caused, in part, by ebb flow separation at the upstream Cairn
Point that creates a low-flow region at the port. Experimentation with the models also provided insight into potential improvements to
dredge material disposal practices .
Theoretical analyses examined potential turbulence scale effects caused by geometric model distortion, and extensive experiments
were conducted on the flow table to gauge the scale effects. Various jet flow geometries were tested at different model distortions, and
velocity measurements in the region of flow separation were co mpared and evaluated. Results indicated that turbulence generated by
(Continued)
15. SUBJECT TERMS
Cook Inlet
Geometrical distortion
Alaska
Flow table
Port of Anchorage
Alaska District
Physical model
19a. NAME OF RESPONSIBLE
16. SECURITY CLASSIFICATION OF:
17. LIMITATION
18. NUMBER
PERSON
OF ABSTRACT
OF PAGES
a. REPORT
b. ABSTRACT
c. THIS PAGE
19b. TELEPHONE NUMBER (include
area code)
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Standard Form 298 (Rev. 8-98)
Prescribed by ANSI Std. 239.18