Effects of atmospheric pressures on gas transport in the vadose zone
Temporal variations in barometric pressure due to weather patterns may induce air intrusion into the subsurface. This air intrusion can affect monitoring activities aimed at characterizing the composition and movement of gases in the vadose zone. Expressions are presented to estimate gas fluxes due...
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Veröffentlicht in: | Water resources research 1992-03, Vol.28 (3), p.777-791 |
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description | Temporal variations in barometric pressure due to weather patterns may induce air intrusion into the subsurface. This air intrusion can affect monitoring activities aimed at characterizing the composition and movement of gases in the vadose zone. Expressions are presented to estimate gas fluxes due to the combined effects of Knudsen diffusion, multicomponent molecular diffusion, and viscous flow. These expressions are used to evaluate the validity of the single‐component advection‐dispersion equation for simulating gas transport in the presence of atmospheric pressure variations. The single‐component equation provides reasonable results when used to simulate transport in media with relatively high gas permeability. Computer simulations of vertical transport at sites with homogeneous soils indicate that “fresh” air can migrate several meters into the subsurface during a typical barometric pressure cycle. Horizontal pressure gradients can develop at sites with near‐surface heterogeneities. These gradients may cause fresh air to intrude meters or tens of meters into the vadose zone during a storm event. |
doi_str_mv | 10.1029/91WR02766 |
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This air intrusion can affect monitoring activities aimed at characterizing the composition and movement of gases in the vadose zone. Expressions are presented to estimate gas fluxes due to the combined effects of Knudsen diffusion, multicomponent molecular diffusion, and viscous flow. These expressions are used to evaluate the validity of the single‐component advection‐dispersion equation for simulating gas transport in the presence of atmospheric pressure variations. The single‐component equation provides reasonable results when used to simulate transport in media with relatively high gas permeability. Computer simulations of vertical transport at sites with homogeneous soils indicate that “fresh” air can migrate several meters into the subsurface during a typical barometric pressure cycle. Horizontal pressure gradients can develop at sites with near‐surface heterogeneities. These gradients may cause fresh air to intrude meters or tens of meters into the vadose zone during a storm event.</description><identifier>ISSN: 0043-1397</identifier><identifier>EISSN: 1944-7973</identifier><identifier>DOI: 10.1029/91WR02766</identifier><language>eng</language><publisher>United States: Blackwell Publishing Ltd</publisher><subject>540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-) ; ATMOSPHERIC PRESSURE ; COMPUTERIZED SIMULATION ; ENVIRONMENTAL SCIENCES ; ENVIRONMENTAL TRANSPORT ; FLUID FLOW ; GAS FLOW ; MASS TRANSFER ; MATHEMATICAL MODELS ; PERMEABILITY ; PRESSURE EFFECTS ; SIMULATION ; SOILS ; SUBSURFACE ENVIRONMENTS</subject><ispartof>Water resources research, 1992-03, Vol.28 (3), p.777-791</ispartof><rights>Copyright 1992 by the American Geophysical Union.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4520-65eab97b0a58a5d650faecfea2dc2e9af7180815c8358f82c617164b585e1e1d3</citedby><cites>FETCH-LOGICAL-a4520-65eab97b0a58a5d650faecfea2dc2e9af7180815c8358f82c617164b585e1e1d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F91WR02766$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F91WR02766$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/5245238$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Massmann, Joel</creatorcontrib><creatorcontrib>Farrier, Daniel F.</creatorcontrib><title>Effects of atmospheric pressures on gas transport in the vadose zone</title><title>Water resources research</title><addtitle>Water Resour. 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Horizontal pressure gradients can develop at sites with near‐surface heterogeneities. These gradients may cause fresh air to intrude meters or tens of meters into the vadose zone during a storm event.</description><subject>540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)</subject><subject>ATMOSPHERIC PRESSURE</subject><subject>COMPUTERIZED SIMULATION</subject><subject>ENVIRONMENTAL SCIENCES</subject><subject>ENVIRONMENTAL TRANSPORT</subject><subject>FLUID FLOW</subject><subject>GAS FLOW</subject><subject>MASS TRANSFER</subject><subject>MATHEMATICAL MODELS</subject><subject>PERMEABILITY</subject><subject>PRESSURE EFFECTS</subject><subject>SIMULATION</subject><subject>SOILS</subject><subject>SUBSURFACE ENVIRONMENTS</subject><issn>0043-1397</issn><issn>1944-7973</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><recordid>eNp1kE1PGzEQhi0EUsPHgX9gcajUw4JnvV7vHquUhkoIogiUo-U4Y7I0WW89Tvn49XW1FbdeZi7P-47mYewcxCWIsr1qYbkQpa7rAzaBtqoK3Wp5yCZCVLIA2epP7JjoWQioVK0n7Nu19-gS8eC5TbtAwwZj5_gQkWifBw89f7LEU7Q9DSEm3vU8bZD_tutAyN9Dj6fsyNst4dm_fcIev18_TG-K2_vZj-nX28JWqhRFrdCuWr0SVjVWrWslvEXn0ZZrV2JrvYZGNKBcI1Xjm9LVoKGuVqpRCAhrecIuxt5AqTPkuoRu40Lf5w-MKvMR2WTo8wgNMfzaIyWz68jhdmt7DHsyIDWILCKDX0bQxUAU0Zshdjsb3wwI81em-ZCZ2auRfem2-PZ_0CwX00UWK3KiGBMdJXz9SNj409RaamWWdzMzh3YOcCfMQv4BaW2Ddg</recordid><startdate>199203</startdate><enddate>199203</enddate><creator>Massmann, Joel</creator><creator>Farrier, Daniel F.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>OTOTI</scope></search><sort><creationdate>199203</creationdate><title>Effects of atmospheric pressures on gas transport in the vadose zone</title><author>Massmann, Joel ; Farrier, Daniel F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4520-65eab97b0a58a5d650faecfea2dc2e9af7180815c8358f82c617164b585e1e1d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)</topic><topic>ATMOSPHERIC PRESSURE</topic><topic>COMPUTERIZED SIMULATION</topic><topic>ENVIRONMENTAL SCIENCES</topic><topic>ENVIRONMENTAL TRANSPORT</topic><topic>FLUID FLOW</topic><topic>GAS FLOW</topic><topic>MASS TRANSFER</topic><topic>MATHEMATICAL MODELS</topic><topic>PERMEABILITY</topic><topic>PRESSURE EFFECTS</topic><topic>SIMULATION</topic><topic>SOILS</topic><topic>SUBSURFACE ENVIRONMENTS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Massmann, Joel</creatorcontrib><creatorcontrib>Farrier, Daniel F.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Aqualine</collection><collection>OSTI.GOV</collection><jtitle>Water resources research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Massmann, Joel</au><au>Farrier, Daniel F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of atmospheric pressures on gas transport in the vadose zone</atitle><jtitle>Water resources research</jtitle><addtitle>Water Resour. Res</addtitle><date>1992-03</date><risdate>1992</risdate><volume>28</volume><issue>3</issue><spage>777</spage><epage>791</epage><pages>777-791</pages><issn>0043-1397</issn><eissn>1944-7973</eissn><abstract>Temporal variations in barometric pressure due to weather patterns may induce air intrusion into the subsurface. This air intrusion can affect monitoring activities aimed at characterizing the composition and movement of gases in the vadose zone. Expressions are presented to estimate gas fluxes due to the combined effects of Knudsen diffusion, multicomponent molecular diffusion, and viscous flow. These expressions are used to evaluate the validity of the single‐component advection‐dispersion equation for simulating gas transport in the presence of atmospheric pressure variations. The single‐component equation provides reasonable results when used to simulate transport in media with relatively high gas permeability. Computer simulations of vertical transport at sites with homogeneous soils indicate that “fresh” air can migrate several meters into the subsurface during a typical barometric pressure cycle. Horizontal pressure gradients can develop at sites with near‐surface heterogeneities. These gradients may cause fresh air to intrude meters or tens of meters into the vadose zone during a storm event.</abstract><cop>United States</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/91WR02766</doi><tpages>15</tpages></addata></record> |
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subjects | 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-) ATMOSPHERIC PRESSURE COMPUTERIZED SIMULATION ENVIRONMENTAL SCIENCES ENVIRONMENTAL TRANSPORT FLUID FLOW GAS FLOW MASS TRANSFER MATHEMATICAL MODELS PERMEABILITY PRESSURE EFFECTS SIMULATION SOILS SUBSURFACE ENVIRONMENTS |
title | Effects of atmospheric pressures on gas transport in the vadose zone |
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