Cryogenic Sampling of Frazil Ice Deposits

Studies of cold regions rivers have indicated the importance of frazil ice deposits in determining their winter regime. Frazil ice commonly deposits as hanging dams, anchor ice or longitudinal bars. A frazil ice deposit may contain variable distributions of ice particle size, density or porosity, an...

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Bibliographic Details
Main Authors: Chacho, Edward F., Jr., Brockett, Bruce E., Lawson, Daniel E.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1989
Subjects:
Snow
Ice and Permafrost
*ICE
DAMS
DISTRIBUTION
ALASKA
PROTOTYPES
COLD REGIONS
DEPTH
POROSITY
VARIABLES
DEPOSITION
WINTER
SAMPLING
CONCENTRATION(COMPOSITION)
RIVERS
SAMPLERS
CRYOGENICS
SEDIMENTS
DENSITY
PARTICLE SIZE
FRAZIL ICE
RIVER ICE
TANANA RIVER
ICE DAMS
RIVER ICE SAMPLERS
Fairbanks
Ice
permafrost
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADA212207
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA212207
Description
Summary:Studies of cold regions rivers have indicated the importance of frazil ice deposits in determining their winter regime. Frazil ice commonly deposits as hanging dams, anchor ice or longitudinal bars. A frazil ice deposit may contain variable distributions of ice particle size, density or porosity, and sediment concentration. A prototype cryogenic sampler has been used to examine frazil ice deposits beneath the ice-covered Tanana River near Fairbanks, Alaska. Modification of a streambed sediment sampler has provided full depth, in situ samples of frazil ice deposits, which are suitable for determining structure and overall composition.

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