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dc.contributor.author
Cisneros, Julia
dc.contributor.author
Best, Jim
dc.contributor.author
van Dijk, Thaiënne
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Almeida, Renato Paes de
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Amsler, Mario Luis
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Boldt, Justin
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Freitas, Bernardo
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Galeazzi, Cristiano
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Huizinga, Richard
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Ianniruberto, Marco
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Ma, Hongbo
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Nittrouer, Jeffrey A.
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Oberg, Kevin
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Orfeo, Oscar
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Parsons, Dan
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Szupiany, Ricardo Nicolas
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Wang, Ping
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Zhang, Yuanfeng
dc.date.available
2021-07-29T13:44:59Z
dc.date.issued
2020-02
dc.identifier.citation
Cisneros, Julia; Best, Jim; van Dijk, Thaiënne; Almeida, Renato Paes de; Amsler, Mario Luis; et al.; Dunes in the world’s big rivers are characterized by low-angle lee-side slopes and a complex shape; Nature Publishing Group; Nature Geoscience; 13; 2; 2-2020; 156-162
dc.identifier.issn
1752-0894
dc.identifier.uri
http://hdl.handle.net/11336/137311
dc.description.abstract
Dunes form critical agents of bedload transport in all of the world’s big rivers, and constitute appreciable sources of bed roughness and flow resistance. Dunes also generate stratification that is the most common depositional feature of ancient riverine sediments. However, current models of dune dynamics and stratification are conditioned by bedform geometries observed in small rivers and laboratory experiments. For these dunes, the downstream lee-side is often assumed to be simple in shape and sloping at the angle of repose. Here we show, using a unique compilation of high-resolution bathymetry from a range of large rivers, that dunes are instead characterized predominantly by low-angle lee-side slopes (<10°), complex lee-side shapes with the steepest portion near the base of the lee-side slope and a height that is often only 10% of the local flow depth. This radically different shape of river dunes demands that such geometries are incorporated into predictions of flow resistance, water levels and flood risk and calls for rethinking of dune scaling relationships when reconstructing palaeoflow depths and a fundamental reappraisal of the character, and origin, of low-angle cross-stratification within interpretations of ancient alluvial sediments.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Nature Publishing Group
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
DUNES
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WORLD LARGEST RIVERS
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LOW LEE-SIDE ANGLES
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REAPPRAISAL OF RIVER FLOW METRICS
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Oceanografía, Hidrología, Recursos Hídricos
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Dunes in the world’s big rivers are characterized by low-angle lee-side slopes and a complex shape
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-07-01T17:10:01Z
dc.journal.volume
13
dc.journal.number
2
dc.journal.pagination
156-162
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Cisneros, Julia. University of Illinois. Urbana - Champaign; Estados Unidos
dc.description.fil
Fil: Best, Jim. University of Illinois. Urbana - Champaign; Estados Unidos
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Fil: van Dijk, Thaiënne. University of Illinois. Urbana - Champaign; Estados Unidos
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Fil: Almeida, Renato Paes de. Universidade de Sao Paulo; Brasil
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Fil: Amsler, Mario Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
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Fil: Boldt, Justin. United States Geological Survey; Estados Unidos
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Fil: Freitas, Bernardo. Universidade Estadual de Campinas; Brasil
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Fil: Galeazzi, Cristiano. Universidade de Sao Paulo; Brasil
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Fil: Huizinga, Richard. United States Geological Survey; Estados Unidos
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Fil: Ianniruberto, Marco. Universidade do Brasília; Brasil
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Fil: Ma, Hongbo. Rice University; Estados Unidos
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Fil: Nittrouer, Jeffrey A.. Rice University; Estados Unidos
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Fil: Oberg, Kevin. United States Geological Survey; Estados Unidos
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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
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Fil: Parsons, Dan. University of Hull; Reino Unido
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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; Argentina
dc.description.fil
Fil: Wang, Ping. Yellow River Conservancy Commission; China
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Fil: Zhang, Yuanfeng. Yellow River Conservancy Commission; China
dc.journal.title
Nature Geoscience
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41561-019-0511-7
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1038/s41561-019-0511-7
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