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
Format: Report
Language:English
Subjects:
ALASKA
COLD REGIONS
CONCENTRATION(COMPOSITION)
CRYOGENICS
DAMS
DENSITY
DEPOSITION
DEPTH
DISTRIBUTION
FRAZIL ICE
ICE
ICE DAMS
PARTICLE SIZE
POROSITY
PROTOTYPES
RIVER ICE
RIVER ICE SAMPLERS
RIVERS
SAMPLERS
SAMPLING
SEDIMENTS
Snow, Ice and Permafrost
TANANA RIVER
VARIABLES
WINTER
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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.