Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
September 1996
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Effects of Ice Boom Geometry on Ice Capture Efficiency
CWIS 32587
6. AUTHORS
Gordon Gooch
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Special Report 96-17
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
Office of the Chief of Engineers
Washington, DC 20314-1000
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement consult Standard Practice for Use of the International System of Units (SI),
ASTM Standard E380-93, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa. 19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. ABSTRACT (Maximum 200 words)
An ice boom's geometry is critical to the collection and retention of ice in small, fast-moving streams and rivers.
Ice booms are designed to quickly form a solid ice cover much earlier than the ice cover would form naturally.
Once formed, the ice cover insulates the river, eliminating the production of frazil ice locally. Frazil leads to thick
ice deposits, which reduce the river 's available flow area and contribute to midwinter and spring flooding.
Model experiments, conducted at the Ice Engineering Facility at the Cold Regions Research and Engineering
Laboratory, have varied the ice boom geometry to speed up the process of ice cover formation. Model simula-
tions have used floating plastic beads to simulate real ice particles to determine what ice boom design works
best. Under controlled laboratory conditions, boom geometry clearly affects the boom's ability to captured more
beads. Comparison of field and laboratory tests indicates similar results.
14. SUBJECT TERMS
15. NUMBER OF PAGES
Ice booms
12
Ice jams
16. PRICE CODE
Model tests
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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