Observations of Bedform Migration and Bedload Sediment Transport in Combined Wave‐Current Flows.
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| Title: | Observations of Bedform Migration and Bedload Sediment Transport in Combined Wave‐Current Flows. |
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| Authors: | Wengrove, M. E.1 meagan.wengrove@oregonstate.edu, Foster, D. L.2, Lippmann, T. C.3, de Schipper, M. A.4, Calantoni, J.5 |
| Source: | Journal of Geophysical Research. Oceans. Jul2019, Vol. 124 Issue 7, p4572-4590. 19p. |
| Subject Terms: | *Sediment transport, Meteorological observations, Bed load, Wave-current interaction, Kinetic energy |
| Abstract: | Bedload transport is an important mechanism for sediment flux in the nearshore. Yet few studies examine the relationship between bedform evolution and net sediment transport. Our work contributes concurrent observations of bedform mobility and bedload transport in response to wave dominant, current dominant, and combined wave‐current flows in the nearshore. Bedload sediment flux from migrating bedforms during combined wave‐current conditions accounted for at least 20% more bedload transport when compared with wave dominant flows and at least 80% more than current‐dominant flows. Bedforms were observed to transport the most sediment during periods with strong currents, with high‐energy skewed waves, and while bedform orientation and transport direction were aligned. Regardless of flow type, bedform migration rates were directly proportional to the total kinetic energy contained in the flow field. Eleven bedload transport models formulated to be used in combined flows (both shear and energetics based) were compared with sediment flux estimated from measured bedform migration. An energetics based sediment transport model was most representative for our data. Key Points: The total kinetic energy in the flow field and the bedform migration rate are directly proportionalSediment flux in combined wave currents was found to be greater than in wave dominant flows with comparable kinetic energyData and comparison with bedload sediment flux models shows that energetics may be most representative of system physics [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Oceans 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: | GreenFILE |
| FullText | Text: Availability: 0 |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 138151130 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Observations of Bedform Migration and Bedload Sediment Transport in Combined Wave‐Current Flows. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wengrove%2C+M%2E+E%2E%22">Wengrove, M. E.</searchLink><relatesTo>1</relatesTo><i> meagan.wengrove@oregonstate.edu</i><br /><searchLink fieldCode="AR" term="%22Foster%2C+D%2E+L%2E%22">Foster, D. L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lippmann%2C+T%2E+C%2E%22">Lippmann, T. C.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22de Schipper%2C+M%2E+A%2E%22">de Schipper, M. A.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Calantoni%2C+J%2E%22">Calantoni, J.</searchLink><relatesTo>5</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Oceans%22">Journal of Geophysical Research. Oceans</searchLink>. Jul2019, Vol. 124 Issue 7, p4572-4590. 19p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Sediment+transport%22">Sediment transport</searchLink><br /><searchLink fieldCode="DE" term="%22Meteorological+observations%22">Meteorological observations</searchLink><br /><searchLink fieldCode="DE" term="%22Bed+load%22">Bed load</searchLink><br /><searchLink fieldCode="DE" term="%22Wave-current+interaction%22">Wave-current interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Kinetic+energy%22">Kinetic energy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Bedload transport is an important mechanism for sediment flux in the nearshore. Yet few studies examine the relationship between bedform evolution and net sediment transport. Our work contributes concurrent observations of bedform mobility and bedload transport in response to wave dominant, current dominant, and combined wave‐current flows in the nearshore. Bedload sediment flux from migrating bedforms during combined wave‐current conditions accounted for at least 20% more bedload transport when compared with wave dominant flows and at least 80% more than current‐dominant flows. Bedforms were observed to transport the most sediment during periods with strong currents, with high‐energy skewed waves, and while bedform orientation and transport direction were aligned. Regardless of flow type, bedform migration rates were directly proportional to the total kinetic energy contained in the flow field. Eleven bedload transport models formulated to be used in combined flows (both shear and energetics based) were compared with sediment flux estimated from measured bedform migration. An energetics based sediment transport model was most representative for our data. Key Points: The total kinetic energy in the flow field and the bedform migration rate are directly proportionalSediment flux in combined wave currents was found to be greater than in wave dominant flows with comparable kinetic energyData and comparison with bedload sediment flux models shows that energetics may be most representative of system physics [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Oceans 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: 10.1029/2018JC014555 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 4572 Subjects: – SubjectFull: Sediment transport Type: general – SubjectFull: Meteorological observations Type: general – SubjectFull: Bed load Type: general – SubjectFull: Wave-current interaction Type: general – SubjectFull: Kinetic energy Type: general Titles: – TitleFull: Observations of Bedform Migration and Bedload Sediment Transport in Combined Wave‐Current Flows. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wengrove, M. E. – PersonEntity: Name: NameFull: Foster, D. L. – PersonEntity: Name: NameFull: Lippmann, T. C. – PersonEntity: Name: NameFull: de Schipper, M. A. – PersonEntity: Name: NameFull: Calantoni, J. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 21699275 Numbering: – Type: volume Value: 124 – Type: issue Value: 7 Titles: – TitleFull: Journal of Geophysical Research. Oceans Type: main |
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