{"@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/1390282680433876864.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5917/jagh1987.46.37"}},{"identifier":{"@type":"NAID","@value":"130004600883"}}],"dc:title":[{"@language":"ja","@value":"地下水中の硝酸イオンに対するシルト,粘土層の役割"},{"@language":"en","@value":"The role of silt and clay layer on nitrate concentration in groundwater"}],"dcterms:alternative":[{"@language":"ja","@value":"水理学的バリアか生物化学的バリアか"},{"@language":"en","@value":"hydraulic barrier or biochemical barrier"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"The authors conducted the study to clarify the role of aquitard on nitrate in groundwater in Tsukuba upland and the slope. The groundwater flow pattern was primarily horizontal in the sand and gravel layer and vertical (downward) through the underlying aquitard with dark greenish gray color. Groundwater in the sand and gravel layer contained nitrate of 0.350-1.150mM and in the aquitard with dark greenish gray color did below 0.015mM. The groundwater flow pattern and the simple chemical mass balance showed that biochemical barrier such as denitrification led to the decrease of NO<SUB>3</SUB><SUP>-</SUP> concentration in the silt and clay layer with dark greenish gray color of the slope. On the other hand, in the upland, the results of the measurement of electrical conductivity in groundwater and the observation of water level indicated that the clay layer with dark greenish gray color filled the role of hydraulic barrier."},{"@language":"ja","@value":"地下水中のNO<SUB>3</SUB>-に対する難透水層の役割を明らかにするために,筑波台地とその縁辺斜面の2地点において観測を行った.両地点において,地下水流動形態は対象とした暗緑灰色難透水層において鉛直下方であった.地下水中のNO<SUB>3</SUB><SUP>-</SUP>濃度は,礫混じり砂層で0.350から1.150mM,暗緑灰色難透水層で0.015mM以下であった.地下水流動形態と地下水水質の化学収支の結果は,斜面における暗緑灰色シルト・粘土層中では生物化学バリアとして脱窒作用が働いていることを示した.一方,台地では暗緑灰色粘土層が,NO<SUB>3</SUB><SUP>-</SUP>に対して水理学的バリアの役割を果たしていることが,地下水の電気伝導度測定,水位観測結果から明らかになった."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420001326220756352","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"40598520"},{"@type":"NRID","@value":"1000040598520"},{"@type":"NRID","@value":"9000006192321"},{"@type":"NRID","@value":"9000022980935"},{"@type":"NRID","@value":"9000022980974"},{"@type":"NRID","@value":"9000400159948"},{"@type":"NRID","@value":"9000018766329"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/_ioka"}],"foaf:name":[{"@language":"ja","@value":"井岡 聖一郎"},{"@language":"en","@value":"IOKA Sei-ichiro"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Doctoral Program in Geoscience, University of Tsukuba"},{"@language":"ja","@value":"筑波大学大学院地球科学研究科"}]},{"@id":"https://cir.nii.ac.jp/crid/1030003658350130816","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"40133011"},{"@type":"NRID","@value":"1000040133011"},{"@type":"NRID","@value":"9000107373915"},{"@type":"NRID","@value":"9000413536760"},{"@type":"NRID","@value":"9000413536763"},{"@type":"NRID","@value":"9000258432064"},{"@type":"NRID","@value":"9000403874241"},{"@type":"NRID","@value":"9000403874237"},{"@type":"NRID","@value":"9000413529931"},{"@type":"NRID","@value":"9000413529934"},{"@type":"NRID","@value":"9000021848826"},{"@type":"NRID","@value":"9000021841699"},{"@type":"NRID","@value":"9000253275184"},{"@type":"NRID","@value":"9000403897138"},{"@type":"NRID","@value":"9000018430337"},{"@type":"NRID","@value":"9000021833277"},{"@type":"NRID","@value":"9000392038798"},{"@type":"NRID","@value":"9000020172171"},{"@type":"NRID","@value":"9000020665584"},{"@type":"NRID","@value":"9000019177457"},{"@type":"NRID","@value":"9000413528300"},{"@type":"NRID","@value":"9000413528297"},{"@type":"NRID","@value":"9000413527270"},{"@type":"NRID","@value":"9000413527268"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0018421"}],"foaf:name":[{"@language":"ja","@value":"田瀬 則雄"},{"@language":"en","@value":"TASE Norio"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Institute of Geoscience, University of Tsukuba"},{"@language":"ja","@value":"筑波大学地球科学系"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"09134182"}],"prism:publicationName":[{"@language":"en","@value":"Journal of Groundwater Hydrology"},{"@value":"地下水学会誌"},{"@language":"en","@value":"Journal of Groundwater Hydrology"},{"@value":"地下水学会誌"}],"dc:publisher":[{"@language":"en","@value":"Japanese Association of Groundwater Hydrology"}],"prism:publicationDate":"2004","prism:volume":"46","prism:number":"1","prism:startingPage":"37","prism:endingPage":"50"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","availableAt":"2004","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=NO%3CSUB%3E3%3C/SUB%3E%3CSUP%3E-%3C/SUP%3E","dc:title":"NO<SUB>3</SUB><SUP>-</SUP>"},{"@id":"https://cir.nii.ac.jp/all?q=%E9%9B%A3%E9%80%8F%E6%B0%B4%E5%B1%A4","dc:title":"難透水層"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%9C%B0%E4%B8%8B%E6%B0%B4%E6%B5%81%E5%8B%95%E5%BD%A2%E6%85%8B","dc:title":"地下水流動形態"},{"@id":"https://cir.nii.ac.jp/all?q=%E6%B0%B4%E7%90%86%E5%AD%A6%E7%9A%84%E3%83%90%E3%83%AA%E3%82%A2","dc:title":"水理学的バリア"},{"@id":"https://cir.nii.ac.jp/all?q=%E7%94%9F%E7%89%A9%E5%8C%96%E5%AD%A6%E7%9A%84%E3%83%90%E3%83%AA%E3%82%A2","dc:title":"生物化学的バリア"},{"@id":"https://cir.nii.ac.jp/all?q=nitrate","dc:title":"nitrate"},{"@id":"https://cir.nii.ac.jp/all?q=aquitard","dc:title":"aquitard"},{"@id":"https://cir.nii.ac.jp/all?q=groundwater%20flow%20pattern","dc:title":"groundwater flow pattern"},{"@id":"https://cir.nii.ac.jp/all?q=hydraulic%20barrier","dc:title":"hydraulic barrier"},{"@id":"https://cir.nii.ac.jp/all?q=biochemical%20barrier","dc:title":"biochemical barrier"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360292621452736896","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Nitrate Removal from Groundwater Using a Denitrification Wall Amended with Sawdust: Field Trial"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574093547561344","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Redox Processes Active in Denitrification"}]},{"@id":"https://cir.nii.ac.jp/crid/1361137045106152448","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Groundwater contamination in Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418519607508736","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Method for Installing Piezometers in Large 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Plume"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233269713591040","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Nitrate Removal in Stream Riparian Zones"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204422791040","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"難透水層中地下水におけるNO<SUB>3</SUB><SUP>-</SUP>濃度のメートルスケールの不均質性"},{"@language":"en","@value":"Meter-scale lateral heterogeneity of nitrate concentrations of groundwater in aquitards"}]},{"@id":"https://cir.nii.ac.jp/crid/1390014648121459072","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Efforts of the Ministry of Environment to Address Groundwater Pollution by Nitrate Nitrogen"},{"@language":"ja","@value":"硝酸性窒素による地下水汚染問題の環境省の取り組み"}]},{"@id":"https://cir.nii.ac.jp/crid/1390014648121499648","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Nitrogen Discharge from Livestock Wastes Thrown in Unlined Pit and Denitrification around the Pit"},{"@language":"ja","@value":"家畜排せつ物の素掘り廃棄ピットからの窒素の流出と周辺における浄化作用"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:1001608087"},{"@type":"CROSSREF","@value":"10.5917/jagh1987.46.37"},{"@type":"CIA","@value":"130004600883"},{"@type":"OPENAIRE","@value":"doi_dedup___::318018be9eb65ec477efdb2f2bf54cd0"},{"@type":"CROSSREF","@value":"10.5026/jgeography.132.93_references_DOI_Z5RlXmA4KCU2r8hbXdRn5tU0Ghx"},{"@type":"CROSSREF","@value":"10.4145/jahs.41.113_references_DOI_Z5RlXmA4KCU2r8hbXdRn5tU0Ghx"},{"@type":"CROSSREF","@value":"10.5026/jgeography.132.169_references_DOI_Z5RlXmA4KCU2r8hbXdRn5tU0Ghx"}]}