Determining the Intrinsic Permeability of Frazil of Frazil Ice. Part 2. Field Investigations

The intrinsic permeability of a frazil deposit can be used to describe its flow capacity and structure. Because of the nature of frazil ice, an in-situ test is desirable when determining this parameter in natural frazil deposits. This report describes the application of the borehole dilution test to...

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Bibliographic Details
Main Authors: White, Kathleen D., Lawson, Daniel E.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1992
Subjects:
Snow
Ice and Permafrost
*PERMEABILITY
*ICE FORMATION
*ESTIMATES
TEST AND EVALUATION
CONDUCTIVITY
DEPOSITS
ICE
FLOW
DILUTION
PERMEAMETERS
SEEPAGE
HYDRAULICS
LABORATORIES
FLOW RATE
BOREHOLES
POROSITY
GRAIN SIZE
VELOCITY
FRAZIL ICE
HYDRAULIC CONDUCTIVITY
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA255410
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA255410
Description
Summary:The intrinsic permeability of a frazil deposit can be used to describe its flow capacity and structure. Because of the nature of frazil ice, an in-situ test is desirable when determining this parameter in natural frazil deposits. This report describes the application of the borehole dilution test to determine seepage velocity, which is then used to calculate intrinsic permeability and estimate porosity. Seepage velocities ranged from 0.29 x 10-3 to 5.98 x 10-3 cm/s (2.56 x l0-3 cm/s average), with an average intrinsic permeability of 2.75 x 10-4 cm2. Porosities for d10 grain sizes of 0.5 and 3.5 were 82.9 and 47.5 %, respectively. Seepage velocity and porosity data are also compared to laboratory data from borehole dilution tests, data measured previously at the same location with an in-situ groundwater flow meter, and to permeameter test results on remolded samples. See also Part 1, AD-A248 325.

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