Modeling of radon transport in unsaturated soil
Identifieur interne : 002D81 ( Istex/Corpus ); précédent : 002D80; suivant : 002D82Modeling of radon transport in unsaturated soil
Auteurs : Chuan Chen ; Donald M. Thomas ; Richard E. GreenSource :
- Journal of Geophysical Research: Solid Earth [ 0148-0227 ] ; 1995-08-10.
Abstract
This study applies a recently developed model, LEACHV, to simulate transport of radon through unsaturated soil and compares calculated soil radon activities against field‐measured values. For volatile and gas phase transport, LEACHV is modified from LEACHP, a pesticide version of LEACHM, a well‐documented one‐dimensional model for water and chemical movement through unsaturated soil. LEACHV adds consideration of air temperature changes and air flow driven by barometric pressure change to the other soil variables currently used in LEACHP. It applies diurnal barometric pressure and air temperature changes to reflect more accurately the typical field conditions. Sensitivity analysis and simulated results have clearly demonstrated the relative importance of barometric pressure change, rainfall events, changes in water content, gas advection, and radon source term in radon transport process. Comparisons among simulated results illustrated that the importance of barometric pressure change and its pumping phenomenon produces both fluctuation in soil gas radon activities and an elevation of the long‐term average radon activity in the shallow soil. Barometric pressure pumping was found to produce an effect on radon activity in shallow soils of an equal magnitude to the distributed source parameter. Comparison between measured and simulated soil radon activities showed that LEACHV can provide realistic estimates of radon activity concentration in the soil profile.
Url:
DOI: 10.1029/95JB01290
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Green</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:3E8E8F2C788C7167AE4D6A8970B0A610F2814C17</idno><date when="1995" year="1995">1995</date><idno type="doi">10.1029/95JB01290</idno><idno type="url">https://api.istex.fr/document/3E8E8F2C788C7167AE4D6A8970B0A610F2814C17/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002D81</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Modeling of radon transport in unsaturated soil</title><author wicri:is="90%"><name sortKey="Chen, Chuan" sort="Chen, Chuan" uniqKey="Chen C" first="Chuan" last="Chen">Chuan Chen</name></author><author wicri:is="90%"><name sortKey="Thomas, Donald M" sort="Thomas, Donald M" uniqKey="Thomas D" first="Donald M." last="Thomas">Donald M. Thomas</name></author><author wicri:is="90%"><name sortKey="Green, Richard E" sort="Green, Richard E" uniqKey="Green R" first="Richard E." last="Green">Richard E. Green</name></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Solid Earth</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="1995-08-10">1995-08-10</date><biblScope unit="volume">100</biblScope><biblScope unit="issue">B8</biblScope><biblScope unit="page" from="15517">15517</biblScope><biblScope unit="page" to="15525">15525</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">3E8E8F2C788C7167AE4D6A8970B0A610F2814C17</idno><idno type="DOI">10.1029/95JB01290</idno><idno type="ArticleID">95JB01290</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">This study applies a recently developed model, LEACHV, to simulate transport of radon through unsaturated soil and compares calculated soil radon activities against field‐measured values. For volatile and gas phase transport, LEACHV is modified from LEACHP, a pesticide version of LEACHM, a well‐documented one‐dimensional model for water and chemical movement through unsaturated soil. LEACHV adds consideration of air temperature changes and air flow driven by barometric pressure change to the other soil variables currently used in LEACHP. It applies diurnal barometric pressure and air temperature changes to reflect more accurately the typical field conditions. Sensitivity analysis and simulated results have clearly demonstrated the relative importance of barometric pressure change, rainfall events, changes in water content, gas advection, and radon source term in radon transport process. Comparisons among simulated results illustrated that the importance of barometric pressure change and its pumping phenomenon produces both fluctuation in soil gas radon activities and an elevation of the long‐term average radon activity in the shallow soil. Barometric pressure pumping was found to produce an effect on radon activity in shallow soils of an equal magnitude to the distributed source parameter. Comparison between measured and simulated soil radon activities showed that LEACHV can provide realistic estimates of radon activity concentration in the soil profile.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Chuan Chen</name></json:item><json:item><name>Donald M. Thomas</name></json:item><json:item><name>Richard E. Green</name></json:item></author><articleId><json:string>95JB01290</json:string></articleId><language><json:string>eng</json:string></language><abstract>This study applies a recently developed model, LEACHV, to simulate transport of radon through unsaturated soil and compares calculated soil radon activities against field‐measured values. For volatile and gas phase transport, LEACHV is modified from LEACHP, a pesticide version of LEACHM, a well‐documented one‐dimensional model for water and chemical movement through unsaturated soil. LEACHV adds consideration of air temperature changes and air flow driven by barometric pressure change to the other soil variables currently used in LEACHP. It applies diurnal barometric pressure and air temperature changes to reflect more accurately the typical field conditions. Sensitivity analysis and simulated results have clearly demonstrated the relative importance of barometric pressure change, rainfall events, changes in water content, gas advection, and radon source term in radon transport process. Comparisons among simulated results illustrated that the importance of barometric pressure change and its pumping phenomenon produces both fluctuation in soil gas radon activities and an elevation of the long‐term average radon activity in the shallow soil. Barometric pressure pumping was found to produce an effect on radon activity in shallow soils of an equal magnitude to the distributed source parameter. Comparison between measured and simulated soil radon activities showed that LEACHV can provide realistic estimates of radon activity concentration in the soil profile.</abstract><qualityIndicators><score>6.959</score><pdfVersion>1.3</pdfVersion><pdfPageSize>626 x 815 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>1478</abstractCharCount><pdfWordCount>4451</pdfWordCount><pdfCharCount>40968</pdfCharCount><pdfPageCount>9</pdfPageCount><abstractWordCount>209</abstractWordCount></qualityIndicators><title>Modeling of radon transport in unsaturated soil</title><genre.original><json:string>article</json:string></genre.original><genre><json:string>article</json:string></genre><host><volume>100</volume><publisherId><json:string>JGRB</json:string></publisherId><pages><total>9</total><last>15525</last><first>15517</first></pages><issn><json:string>0148-0227</json:string></issn><issue>B8</issue><subject><json:item><value>HYDROLOGY</value></json:item><json:item><value>Vadose zone</value></json:item><json:item><value>Evapotranspiration</value></json:item><json:item><value>Soil moisture</value></json:item><json:item><value>Papers on Chemistry and Physics of Minerals and Rocks Volcanology</value></json:item></subject><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>2156-2202</json:string></eissn><title>Journal of Geophysical Research: Solid Earth</title><doi><json:string>10.1002/(ISSN)2156-2202b</json:string></doi></host><publicationDate>1995</publicationDate><copyrightDate>1995</copyrightDate><doi><json:string>10.1029/95JB01290</json:string></doi><id>3E8E8F2C788C7167AE4D6A8970B0A610F2814C17</id><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/3E8E8F2C788C7167AE4D6A8970B0A610F2814C17/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/3E8E8F2C788C7167AE4D6A8970B0A610F2814C17/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/3E8E8F2C788C7167AE4D6A8970B0A610F2814C17/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Modeling of radon transport in unsaturated soil</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><availability><p>WILEY</p></availability><date>1995</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Modeling of radon transport in unsaturated soil</title><author><persName><forename type="first">Chuan</forename><surname>Chen</surname></persName></author><author><persName><forename type="first">Donald M.</forename><surname>Thomas</surname></persName></author><author><persName><forename type="first">Richard E.</forename><surname>Green</surname></persName></author></analytic><monogr><title level="j">Journal of Geophysical Research: Solid Earth</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="pISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><idno type="DOI">10.1002/(ISSN)2156-2202b</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="1995-08-10"></date><biblScope unit="volume">100</biblScope><biblScope unit="issue">B8</biblScope><biblScope unit="page" from="15517">15517</biblScope><biblScope unit="page" to="15525">15525</biblScope></imprint></monogr><idno type="istex">3E8E8F2C788C7167AE4D6A8970B0A610F2814C17</idno><idno type="DOI">10.1029/95JB01290</idno><idno type="ArticleID">95JB01290</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1995</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>This study applies a recently developed model, LEACHV, to simulate transport of radon through unsaturated soil and compares calculated soil radon activities against field‐measured values. For volatile and gas phase transport, LEACHV is modified from LEACHP, a pesticide version of LEACHM, a well‐documented one‐dimensional model for water and chemical movement through unsaturated soil. LEACHV adds consideration of air temperature changes and air flow driven by barometric pressure change to the other soil variables currently used in LEACHP. It applies diurnal barometric pressure and air temperature changes to reflect more accurately the typical field conditions. Sensitivity analysis and simulated results have clearly demonstrated the relative importance of barometric pressure change, rainfall events, changes in water content, gas advection, and radon source term in radon transport process. Comparisons among simulated results illustrated that the importance of barometric pressure change and its pumping phenomenon produces both fluctuation in soil gas radon activities and an elevation of the long‐term average radon activity in the shallow soil. Barometric pressure pumping was found to produce an effect on radon activity in shallow soils of an equal magnitude to the distributed source parameter. Comparison between measured and simulated soil radon activities showed that LEACHV can provide realistic estimates of radon activity concentration in the soil profile.</p></abstract><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>HYDROLOGY</term></item><item><term>Vadose zone</term></item><item><term>Evapotranspiration</term></item><item><term>Soil moisture</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Papers on Chemistry and Physics of Minerals and Rocks Volcanology</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1994-05-25">Received</change><change when="1995-04-18">Registration</change><change when="1995-08-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/3E8E8F2C788C7167AE4D6A8970B0A610F2814C17/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="jgrb10125"><header><publicationMeta level="product"><doi>10.1002/(ISSN)2156-2202b</doi><issn type="print">0148-0227</issn><issn type="electronic">2156-2202</issn><idGroup><id type="product" value="JGRB"></id><id type="coden" value="JGREA2"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH">Journal of Geophysical Research: Solid Earth</title><title type="short">J. 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M.</givenNames> <familyName>Thomas</familyName></author>, and <author><givenNames>R. E.</givenNames> <familyName>Green</familyName></author> (<pubYear year="1995">1995</pubYear>), <articleTitle>Modeling of radon transport in unsaturated soil</articleTitle>, <journalTitle>J. Geophys. Res.</journalTitle>, <vol>100</vol>(<issue>B8</issue>), <pageFirst>15517</pageFirst>–<pageLast>15525</pageLast>, doi:<accessionId ref="info:doi/10.1029/95JB01290">10.1029/95JB01290</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:JGRB.JGRB10125.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Modeling of radon transport in unsaturated soil</title><title type="shortAuthors">Chen ET AL.</title></titleGroup><creators><creator xml:id="jgrb10125-cr-0001"><personName><givenNames>Chuan</givenNames><familyName>Chen</familyName></personName></creator><creator xml:id="jgrb10125-cr-0002"><personName><givenNames>Donald M.</givenNames><familyName>Thomas</familyName></personName></creator><creator xml:id="jgrb10125-cr-0003"><personName><givenNames>Richard E.</givenNames><familyName>Green</familyName></personName></creator></creators><abstractGroup><abstract type="main"><p xml:id="jgrb10125-para-0001">This study applies a recently developed model, LEACHV, to simulate transport of radon through unsaturated soil and compares calculated soil radon activities against field‐measured values. For volatile and gas phase transport, LEACHV is modified from LEACHP, a pesticide version of LEACHM, a well‐documented one‐dimensional model for water and chemical movement through unsaturated soil. LEACHV adds consideration of air temperature changes and air flow driven by barometric pressure change to the other soil variables currently used in LEACHP. It applies diurnal barometric pressure and air temperature changes to reflect more accurately the typical field conditions. Sensitivity analysis and simulated results have clearly demonstrated the relative importance of barometric pressure change, rainfall events, changes in water content, gas advection, and radon source term in radon transport process. Comparisons among simulated results illustrated that the importance of barometric pressure change and its pumping phenomenon produces both fluctuation in soil gas radon activities and an elevation of the long‐term average radon activity in the shallow soil. Barometric pressure pumping was found to produce an effect on radon activity in shallow soils of an equal magnitude to the distributed source parameter. Comparison between measured and simulated soil radon activities showed that LEACHV can provide realistic estimates of radon activity concentration in the soil profile.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Modeling of radon transport in unsaturated soil</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Modeling of radon transport in unsaturated soil</title></titleInfo><name type="personal"><namePart type="given">Chuan</namePart><namePart type="family">Chen</namePart></name><name type="personal"><namePart type="given">Donald M.</namePart><namePart type="family">Thomas</namePart></name><name type="personal"><namePart type="given">Richard E.</namePart><namePart type="family">Green</namePart></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">1995-08-10</dateIssued><dateCaptured encoding="w3cdtf">1994-05-25</dateCaptured><dateValid encoding="w3cdtf">1995-04-18</dateValid><edition>Chen, C., D. M. Thomas, and R. E. Green (1995), Modeling of radon transport in unsaturated soil, J. Geophys. Res., 100(B8), 15517–15525, doi:10.1029/95JB01290.</edition><copyrightDate encoding="w3cdtf">1995</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>This study applies a recently developed model, LEACHV, to simulate transport of radon through unsaturated soil and compares calculated soil radon activities against field‐measured values. For volatile and gas phase transport, LEACHV is modified from LEACHP, a pesticide version of LEACHM, a well‐documented one‐dimensional model for water and chemical movement through unsaturated soil. LEACHV adds consideration of air temperature changes and air flow driven by barometric pressure change to the other soil variables currently used in LEACHP. It applies diurnal barometric pressure and air temperature changes to reflect more accurately the typical field conditions. Sensitivity analysis and simulated results have clearly demonstrated the relative importance of barometric pressure change, rainfall events, changes in water content, gas advection, and radon source term in radon transport process. Comparisons among simulated results illustrated that the importance of barometric pressure change and its pumping phenomenon produces both fluctuation in soil gas radon activities and an elevation of the long‐term average radon activity in the shallow soil. Barometric pressure pumping was found to produce an effect on radon activity in shallow soils of an equal magnitude to the distributed source parameter. Comparison between measured and simulated soil radon activities showed that LEACHV can provide realistic estimates of radon activity concentration in the soil profile.</abstract><relatedItem type="host"><titleInfo><title>Journal of Geophysical Research: Solid Earth</title></titleInfo><titleInfo type="abbreviated"><title>J. Geophys. 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