One Dimensional Water Flow through Snow.
A theory is developed to describe the percolation of water through isothermal snow with a vertical porosity gradient. While the necessary laboratory experiments have not been done for snow, concepts from the general theory of two phase flow through porous media are used in the development. The gener...
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ftdtic:AD0730304 2023-05-15T15:05:24+02:00 One Dimensional Water Flow through Snow. Colbeck,Samuel C. COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H 1971-08 text/html http://www.dtic.mil/docs/citations/AD0730304 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0730304 en eng http://www.dtic.mil/docs/citations/AD0730304 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost Fluid Mechanics *SNOW FLUID FLOW ARCTIC REGIONS ONE DIMENSIONAL FLOW MATHEMATICAL ANALYSIS GLACIERS WATER Text 1971 ftdtic 2016-02-21T19:47:27Z A theory is developed to describe the percolation of water through isothermal snow with a vertical porosity gradient. While the necessary laboratory experiments have not been done for snow, concepts from the general theory of two phase flow through porous media are used in the development. The general solution for the one-dimensional problem is given, which, when combined with any periodic boundary condition, can be used to make quantitative predictions. The theory is applied to water percolation through firn on the upper Seward Glacier. Using appropriate values for the parameters, theory shows a wave of volume flux which travels down into the firn and develops features similar to those observed by Sharp. These include an initially symmetric wave which distorts with depth, continuous (rather than intermittent) downward flow beneath the surface, and a decreasing value for the wave crest with depth. The theory predicts that the waves advance with a shock front which grows with depth. The shock front is thought to be only an approximation to the actual physical process. (Author) Text Arctic Ice permafrost Defense Technical Information Center: DTIC Technical Reports database Arctic Seward Glacier ENVELOPE(-140.304,-140.304,60.266,60.266) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Fluid Mechanics *SNOW FLUID FLOW ARCTIC REGIONS ONE DIMENSIONAL FLOW MATHEMATICAL ANALYSIS GLACIERS WATER |
spellingShingle |
Snow Ice and Permafrost Fluid Mechanics *SNOW FLUID FLOW ARCTIC REGIONS ONE DIMENSIONAL FLOW MATHEMATICAL ANALYSIS GLACIERS WATER Colbeck,Samuel C. One Dimensional Water Flow through Snow. |
topic_facet |
Snow Ice and Permafrost Fluid Mechanics *SNOW FLUID FLOW ARCTIC REGIONS ONE DIMENSIONAL FLOW MATHEMATICAL ANALYSIS GLACIERS WATER |
description |
A theory is developed to describe the percolation of water through isothermal snow with a vertical porosity gradient. While the necessary laboratory experiments have not been done for snow, concepts from the general theory of two phase flow through porous media are used in the development. The general solution for the one-dimensional problem is given, which, when combined with any periodic boundary condition, can be used to make quantitative predictions. The theory is applied to water percolation through firn on the upper Seward Glacier. Using appropriate values for the parameters, theory shows a wave of volume flux which travels down into the firn and develops features similar to those observed by Sharp. These include an initially symmetric wave which distorts with depth, continuous (rather than intermittent) downward flow beneath the surface, and a decreasing value for the wave crest with depth. The theory predicts that the waves advance with a shock front which grows with depth. The shock front is thought to be only an approximation to the actual physical process. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H |
format |
Text |
author |
Colbeck,Samuel C. |
author_facet |
Colbeck,Samuel C. |
author_sort |
Colbeck,Samuel C. |
title |
One Dimensional Water Flow through Snow. |
title_short |
One Dimensional Water Flow through Snow. |
title_full |
One Dimensional Water Flow through Snow. |
title_fullStr |
One Dimensional Water Flow through Snow. |
title_full_unstemmed |
One Dimensional Water Flow through Snow. |
title_sort |
one dimensional water flow through snow. |
publishDate |
1971 |
url |
http://www.dtic.mil/docs/citations/AD0730304 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0730304 |
long_lat |
ENVELOPE(-140.304,-140.304,60.266,60.266) |
geographic |
Arctic Seward Glacier |
geographic_facet |
Arctic Seward Glacier |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0730304 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766337116405497856 |