Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile
An automated data logging system designed to measure gas pressures within a 15‐m‐high waste rock test pile was installed at a diamond mine site in the Northwest Territories, Canada. Data collected from 12 Aug. 2007 to 15 Oct. 2007 shows distinct gas pressure gradients within the waste rock pile. The...
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crwiley:10.2136/vzj2009.0002 2024-09-09T20:00:08+00:00 Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile Amos, Richard T. Blowes, David W. Smith, Leslie Sego, David C. Natural Science and Engineering Research Council of Canada 2009 http://dx.doi.org/10.2136/vzj2009.0002 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2136%2Fvzj2009.0002 http://onlinelibrary.wiley.com/wol1/doi/10.2136/vzj2009.0002/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Vadose Zone Journal volume 8, issue 4, page 953-962 ISSN 1539-1663 1539-1663 journal-article 2009 crwiley https://doi.org/10.2136/vzj2009.0002 2024-08-01T04:22:01Z An automated data logging system designed to measure gas pressures within a 15‐m‐high waste rock test pile was installed at a diamond mine site in the Northwest Territories, Canada. Data collected from 12 Aug. 2007 to 15 Oct. 2007 shows distinct gas pressure gradients within the waste rock pile. The magnitude of the gradients within the pile shows a clear response to wind speed external to the pile. The direction of the gradients shows a response to the wind direction. The results demonstrate the ability to measure wind‐induced gas pressure gradients within a waste rock pile or other similar porous structures. The general pattern of the observed gradients is inconsistent with the results of numerical modeling assuming homogeneous permeability within the pile. This inconsistency suggests that heterogeneity within the pile and an irregular landscape surrounding the pile affect the way in which the wind flows around and air flows through the rock pile. Calculations of O 2 fluxes using the observed gradients show that wind‐induced air flow through the pile has the potential to be a significant mechanism of O 2 transport, similar in magnitude to other mechanism such as diffusion and convection. These results suggest that wind‐driven advection may be an important process in waste rock piles where the supply of oxygen limits the overall rate of sulfide oxidation. Article in Journal/Newspaper Northwest Territories Wiley Online Library Canada Northwest Territories Rock Pile ENVELOPE(-65.167,-65.167,-68.417,-68.417) Vadose Zone Journal 8 4 953 962 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
An automated data logging system designed to measure gas pressures within a 15‐m‐high waste rock test pile was installed at a diamond mine site in the Northwest Territories, Canada. Data collected from 12 Aug. 2007 to 15 Oct. 2007 shows distinct gas pressure gradients within the waste rock pile. The magnitude of the gradients within the pile shows a clear response to wind speed external to the pile. The direction of the gradients shows a response to the wind direction. The results demonstrate the ability to measure wind‐induced gas pressure gradients within a waste rock pile or other similar porous structures. The general pattern of the observed gradients is inconsistent with the results of numerical modeling assuming homogeneous permeability within the pile. This inconsistency suggests that heterogeneity within the pile and an irregular landscape surrounding the pile affect the way in which the wind flows around and air flows through the rock pile. Calculations of O 2 fluxes using the observed gradients show that wind‐induced air flow through the pile has the potential to be a significant mechanism of O 2 transport, similar in magnitude to other mechanism such as diffusion and convection. These results suggest that wind‐driven advection may be an important process in waste rock piles where the supply of oxygen limits the overall rate of sulfide oxidation. |
author2 |
Natural Science and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Amos, Richard T. Blowes, David W. Smith, Leslie Sego, David C. |
spellingShingle |
Amos, Richard T. Blowes, David W. Smith, Leslie Sego, David C. Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile |
author_facet |
Amos, Richard T. Blowes, David W. Smith, Leslie Sego, David C. |
author_sort |
Amos, Richard T. |
title |
Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile |
title_short |
Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile |
title_full |
Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile |
title_fullStr |
Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile |
title_full_unstemmed |
Measurement of Wind‐Induced Pressure Gradients in a Waste Rock Pile |
title_sort |
measurement of wind‐induced pressure gradients in a waste rock pile |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.2136/vzj2009.0002 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2136%2Fvzj2009.0002 http://onlinelibrary.wiley.com/wol1/doi/10.2136/vzj2009.0002/fullpdf |
long_lat |
ENVELOPE(-65.167,-65.167,-68.417,-68.417) |
geographic |
Canada Northwest Territories Rock Pile |
geographic_facet |
Canada Northwest Territories Rock Pile |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Vadose Zone Journal volume 8, issue 4, page 953-962 ISSN 1539-1663 1539-1663 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2136/vzj2009.0002 |
container_title |
Vadose Zone Journal |
container_volume |
8 |
container_issue |
4 |
container_start_page |
953 |
op_container_end_page |
962 |
_version_ |
1809931273963044864 |