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...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1989
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA212207 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA212207 |
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. |
---|