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dc.contributor.author
Repasch, Marisa
dc.contributor.author
Wittmann, Hella
dc.contributor.author
Scheingross, Joel S.
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Sachse, Dirk
dc.contributor.author
Szupiany, Ricardo Nicolas
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dc.contributor.author
Orfeo, Oscar
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dc.contributor.author
Fuchs, Margret
dc.contributor.author
Hovius, Niels
dc.date.available
2022-10-24T16:56:36Z
dc.date.issued
2020-06
dc.identifier.citation
Repasch, Marisa; Wittmann, Hella; Scheingross, Joel S.; Sachse, Dirk; Szupiany, Ricardo Nicolas; et al.; Sediment Transit Time and Floodplain Storage Dynamics in Alluvial Rivers Revealed by Meteoric 10Be; Blackwell Publishing; Journal of Geophysical Research: Earth Surface; 125; 7; 6-2020; 1-19
dc.identifier.issn
2169-9003
dc.identifier.uri
http://hdl.handle.net/11336/174616
dc.description.abstract
Quantifying the time scales of sediment transport and storage through river systems is fundamental for understanding weathering processes, biogeochemical cycling, and improving watershed management, but measuring sediment transit time is challenging. Here we provide the first systematic test of measuring cosmogenic meteoric Beryllium-10 (10Bem) in the sediment load of a large alluvial river to quantify sediment transit times. We take advantage of a natural experiment in the Rio Bermejo, a lowland alluvial river traversing the east Andean foreland basin in northern Argentina. This river has no tributaries along its trunk channel for nearly 1,300 km downstream from the mountain front. We sampled suspended sediment depth profiles along the channel and measured the concentrations of 10Bem in the chemically extracted grain coatings. We calculated depth-integrated 10Bem concentrations using sediment flux data and found that 10Bem concentrations increase 230% from upstream to downstream, indicating a mean total sediment transit time of 8.4 ± 2.2 kyr. Bulk sediment budget-based estimates of channel belt and fan storage times suggest that the 10Bem tracer records mixing of old and young sediment reservoirs. On a reach scale, 10Bem transit times are shorter where the channel is braided and superelevated above the floodplain, and longer where the channel is incised and meandering, suggesting that transit time is controlled by channel morphodynamics. This is the first systematic application of 10Bem as a sediment transit time tracer and highlights the method's potential for inferring sediment routing and storage dynamics in large river systems.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Blackwell Publishing
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
FLOODPLAINS
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METEORIC 10BE
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RIVER SEDIMENT
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SEDIMENT ROUTING
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SEDIMENT TRANSIT TIME
dc.subject.classification
Geoquímica y Geofísica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Sediment Transit Time and Floodplain Storage Dynamics in Alluvial Rivers Revealed by Meteoric 10Be
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-09-22T15:20:37Z
dc.identifier.eissn
2169-9011
dc.journal.volume
125
dc.journal.number
7
dc.journal.pagination
1-19
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Washington
dc.description.fil
Fil: Repasch, Marisa. Gfz German Research Centre For Geosciences; Alemania. Universitat Potsdam; Alemania
dc.description.fil
Fil: Wittmann, Hella. Gfz German Research Centre For Geosciences; Alemania
dc.description.fil
Fil: Scheingross, Joel S.. Gfz German Research Centre For Geosciences; Alemania
dc.description.fil
Fil: Sachse, Dirk. Gfz German Research Centre For Geosciences; Alemania
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Fil: Szupiany, Ricardo Nicolas. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
dc.description.fil
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
dc.description.fil
Fil: Fuchs, Margret. Helmholtz Institute Freiberg For Resourcetechnology; Alemania
dc.description.fil
Fil: Hovius, Niels. Gfz German Research Centre For Geosciences; Alemania
dc.journal.title
Journal of Geophysical Research: Earth Surface
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1029/2019JF005419
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2019JF005419
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