A general reactive transport modeling framework for simulating and interpreting groundwater 14C age and δ13C.
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| Title: | A general reactive transport modeling framework for simulating and interpreting groundwater 14C age and δ13C. |
|---|---|
| Authors: | Salmon, S. U.1,2, Prommer, H.1,2,3, Park, J.3, Meredith, K. T.4, Turner, J. V.3, McCallum, J. L.2,5 |
| Source: | Water Resources Research. Jan2015, Vol. 51 Issue 1, p359-376. 18p. |
| Subjects: | Groundwater quality, Groundwater, Groundwater flow, Mathematical models, Groundwater mixing, Radioactive decay |
| Abstract: | A reactive transport modeling framework is presented that allows simultaneous assessment of groundwater flow, water quality evolution including δ13C, and 14C activity or 'age'. Through application of this framework, simulated 14C activities can be directly compared with measured 14C activities. This bypasses the need for interpretation of a 14C age prior to flow simulation through factoring out processes other than radioactive decay, which typically involves simplifying assumptions regarding spatial and temporal variability in reactions, flow, and mixing. The utility of the approach is demonstrated for an aquifer system with spatially variable carbonate mineral distribution, multiple organic carbon sources, and transient boundary conditions for 14C activity in the recharge water. In this case, the simulated 14C age was shown to be relatively insensitive to isotopic fractionation during DOC oxidation and variations in assumed DOC degradation behavior. We demonstrate that the model allows quantitative testing of hypotheses regarding controls on groundwater age and water quality evolution for all three carbon isotopes. The approach also facilitates incorporation of multiple environmental tracers and combination with parameter optimization techniques. [ABSTRACT FROM AUTHOR] |
| Copyright of Water Resources Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 101023624 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A general reactive transport modeling framework for simulating and interpreting groundwater <superscript>14</superscript>C age and δ<superscript>13</superscript>C. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Salmon%2C+S%2E+U%2E%22">Salmon, S. U.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Prommer%2C+H%2E%22">Prommer, H.</searchLink><relatesTo>1,2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Park%2C+J%2E%22">Park, J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Meredith%2C+K%2E+T%2E%22">Meredith, K. T.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Turner%2C+J%2E+V%2E%22">Turner, J. V.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22McCallum%2C+J%2E+L%2E%22">McCallum, J. L.</searchLink><relatesTo>2,5</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Water+Resources+Research%22">Water Resources Research</searchLink>. Jan2015, Vol. 51 Issue 1, p359-376. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Groundwater+quality%22">Groundwater quality</searchLink><br /><searchLink fieldCode="DE" term="%22Groundwater%22">Groundwater</searchLink><br /><searchLink fieldCode="DE" term="%22Groundwater+flow%22">Groundwater flow</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models%22">Mathematical models</searchLink><br /><searchLink fieldCode="DE" term="%22Groundwater+mixing%22">Groundwater mixing</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+decay%22">Radioactive decay</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A reactive transport modeling framework is presented that allows simultaneous assessment of groundwater flow, water quality evolution including δ13C, and 14C activity or 'age'. Through application of this framework, simulated 14C activities can be directly compared with measured 14C activities. This bypasses the need for interpretation of a 14C age prior to flow simulation through factoring out processes other than radioactive decay, which typically involves simplifying assumptions regarding spatial and temporal variability in reactions, flow, and mixing. The utility of the approach is demonstrated for an aquifer system with spatially variable carbonate mineral distribution, multiple organic carbon sources, and transient boundary conditions for 14C activity in the recharge water. In this case, the simulated 14C age was shown to be relatively insensitive to isotopic fractionation during DOC oxidation and variations in assumed DOC degradation behavior. We demonstrate that the model allows quantitative testing of hypotheses regarding controls on groundwater age and water quality evolution for all three carbon isotopes. The approach also facilitates incorporation of multiple environmental tracers and combination with parameter optimization techniques. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Water Resources Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/2014WR015779 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 359 Subjects: – SubjectFull: Groundwater quality Type: general – SubjectFull: Groundwater Type: general – SubjectFull: Groundwater flow Type: general – SubjectFull: Mathematical models Type: general – SubjectFull: Groundwater mixing Type: general – SubjectFull: Radioactive decay Type: general Titles: – TitleFull: A general reactive transport modeling framework for simulating and interpreting groundwater 14C age and δ13C. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Salmon, S. U. – PersonEntity: Name: NameFull: Prommer, H. – PersonEntity: Name: NameFull: Park, J. – PersonEntity: Name: NameFull: Meredith, K. T. – PersonEntity: Name: NameFull: Turner, J. V. – PersonEntity: Name: NameFull: McCallum, J. L. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00431397 Numbering: – Type: volume Value: 51 – Type: issue Value: 1 Titles: – TitleFull: Water Resources Research Type: main |
| ResultId | 1 |
