{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282679643264384.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.3208/sandf.48.397"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S003808062030439X?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S003808062030439X?httpAccept=text/plain"}},{"identifier":{"@type":"NAID","@value":"130004552337"}}],"dc:title":[{"@language":"en","@value":"LINEAR MODEL TO PREDICT SOIL-GAS DIFFUSIVITY FROM TWO SOIL-WATER RETENTION POINTS IN UNSATURATED VOLCANIC ASH SOILS"}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"Risk assessment and design of remediation methods at soil sites polluted with gaseous phase contaminant require an accurate description of soil-gas diffusion coefficient (<i>D</i><sub>p</sub>) which is typically governed by the variations in soil air-filled porosity (<i>v</i><sub>a</sub>). For undisturbed volcanic ash soils, recent studies have shown that a linear <i>D</i><sub>p</sub>(<i>v</i><sub>a</sub>) model, taking into account inactive air-filled pore space (threshold soil-air content, <i>v</i><sub>a, th</sub>), captured the <i>D</i><sub>p</sub> data across the total soil moisture range from wet to completely dry conditions. In this study, we developed a simple, easy to apply, and still accurate linear <i>D</i><sub>p</sub>(<i>v</i><sub>a</sub>) model for undisturbed volcanic ash soils. The model slope <i>C</i> and intercept (interpreted as <i>v</i><sub>a, th</sub>) were derived using the classical Buckingham (1904) <i>D</i><sub>p</sub>(<i>v</i><sub>a</sub>) power-law model, <i>v</i><sub>a</sub><sup><i>X</i></sup>, at two soil-water matric potentials of pF 2 (near field capacity condition) and pF 4.1 (near wilting point condition), and assuming the same value for the Buckingham exponent (<i>X</i>=2.3) in agreement with measured data. This linear <i>D</i><sub>p</sub>(<i>v</i><sub>a</sub>) prediction model performed better than the traditionally-used non-linear <i>D</i><sub>p</sub>(<i>v</i><sub>a</sub>) models, especially at dry soil conditions, when tested against several independent data sets from literature. Model parameter sensitivity analysis on soil compaction effects showed that a decrease in slope <i>C</i> and <i>v</i><sub>a, th</sub> due to uniaxial reduction of air-filled pore space in between aggregates markedly affects the magnitude of soil-gas diffusivity. We recommend the new <i>D</i><sub>p</sub>(<i>v</i><sub>a</sub>) model using only the soil-air contents at two soil-water matric potential conditions (field capacity and wilting point) for a rapid assessment of the entire <i>D</i><sub>p</sub>-<i>v</i><sub>a</sub> function.<br>"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410282679643264385","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000258248020"}],"foaf:name":[{"@language":"en","@value":"RESURRECCION AUGUSTUS C."}],"jpcoar:affiliationName":[{"@language":"en","@value":"Dept. of Engineering Sciences, University of the Philippines-Diliman"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679643264388","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000258248023"}],"foaf:name":[{"@language":"en","@value":"ODA MASANOBU"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Graduate School of Science and Engineering, Saitama University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679643264386","@type":"Researcher","foaf:name":[{"@language":"en","@value":"YOSHIKAWA SEIKO"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Hilly Land Agriculture, National Agricultural Research Center for Western Region"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679643264387","@type":"Researcher","foaf:name":[{"@language":"en","@value":"MOLDRUP PER"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Environmental Engineering Section, Dept. of Biotechnology, Chemistry and Environmental Engineering, Aalborg University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410009224813519746","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000006117014"},{"@type":"NRID","@value":"9000382215682"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0102398"}],"foaf:name":[{"@language":"en","@value":"KOMATSU TOSHIKO"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Graduate School of Science and Engineering, Saitama University"}]},{"@id":"https://cir.nii.ac.jp/crid/1420001326210343296","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"50292644"},{"@type":"NRID","@value":"1000050292644"},{"@type":"NRID","@value":"9000256653211"},{"@type":"NRID","@value":"9000413851877"},{"@type":"NRID","@value":"9000257915230"},{"@type":"NRID","@value":"9000283601172"},{"@type":"NRID","@value":"9000399787327"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0072482"}],"foaf:name":[{"@language":"en","@value":"KAWAMOTO KEN"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Graduate School of Science and Engineering, Saitama University"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00380806"},{"@type":"EISSN","@value":"18811418"}],"prism:publicationName":[{"@language":"en","@value":"SOILS AND FOUNDATIONS"},{"@language":"ja","@value":"ＳＯＩＬＳ　ＡＮＤ　ＦＯＵＮＤＡＴＩＯＮＳ"},{"@language":"en","@value":"S&F"},{"@language":"en","@value":"SOILS FOUND"},{"@language":"en","@value":"SOILS AND FOUNDATIONS"},{"@language":"ja","@value":"ＳＯＩＬＳ　ＡＮＤ　ＦＯＵＮＤＡＴＩＯＮＳ"}],"dc:publisher":[{"@language":"en","@value":"The Japanese Geotechnical Society"},{"@language":"ja","@value":"公益社団法人 地盤工学会"}],"prism:publicationDate":"2008","prism:volume":"48","prism:number":"3","prism:startingPage":"397","prism:endingPage":"406"},"reviewed":"false","url":[{"@id":"https://api.elsevier.com/content/article/PII:S003808062030439X?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S003808062030439X?httpAccept=text/plain"}],"availableAt":"2008","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=air-filled%20porosity","dc:title":"air-filled porosity"},{"@id":"https://cir.nii.ac.jp/all?q=soil-gas%20diffusion%20coefficient","dc:title":"soil-gas diffusion coefficient"},{"@id":"https://cir.nii.ac.jp/all?q=soil-gas%20diffusivity","dc:title":"soil-gas diffusivity"},{"@id":"https://cir.nii.ac.jp/all?q=soil-water%20retention","dc:title":"soil-water retention"},{"@id":"https://cir.nii.ac.jp/all?q=volcanic%20ash%20soil","dc:title":"volcanic ash soil"},{"@id":"https://cir.nii.ac.jp/all?q=(%3Cb%3EIGC%3C/b%3E:%20D4/E14)","dc:title":"(<b>IGC</b>: D4/E14)"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360011143592227072","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Soil fumigation. 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