Variability in alluvial river width driven by intermittent bank collapse

10 pages, 5 figures, supporting information https://doi.org/10.1073/pnas.252544212.-- Data, Materials, and Software Availability: Data used to analyze channel width are available on Zenodo (DOI: https://doi.org/10.5281/zenodo.18077121) (94). Additional data are included in the article and/or support...

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Detalhes bibliográficos
Autores: Zhao, Kun, Lanzoni, Stefano, Coco, Giovanni, Xu, Fan, Zhang, Kaili, Gong, Zheng
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2026
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::ccb0de553a3530d217d23106a9f21803
Acesso em linha:http://hdl.handle.net/10261/432382
https://api.elsevier.com/content/abstract/scopus_id/105035305064
Access Level:Acceso aberto
Palavra-chave:Alluvial rivers
Intermittent bank collapse
Meander dynamics
Width variability
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spelling Variability in alluvial river width driven by intermittent bank collapseZhao, KunLanzoni, StefanoCoco, GiovanniXu, FanZhang, KailiGong, ZhengAlluvial riversIntermittent bank collapseMeander dynamicsWidth variability10 pages, 5 figures, supporting information https://doi.org/10.1073/pnas.252544212.-- Data, Materials, and Software Availability: Data used to analyze channel width are available on Zenodo (DOI: https://doi.org/10.5281/zenodo.18077121) (94). Additional data are included in the article and/or supporting informationAlluvial rivers have long been described by hydraulic geometry theory, which links equilibrium channel dimensions to flow discharge. Yet natural rivers are inherently dynamic, with planforms evolving over time and widths fluctuating around an equilibrium state. Despite increasingly refined datasets, the mechanisms underlying river width variability remain poorly understood. Here, we analyze a globally distributed set of alluvial rivers using high-resolution satellite imagery to examine spatial patterns of width variability. When normalized by mean channel width, we identify three characteristic wavelengths of width variability, each associated with a distinct geomorphic feature: meander bends, mid-channel bars, and localized bank-line incisions linked to intermittent bank collapse. Fourier analysis reveals a strong inverse relation between intermittent collapse-driven width variability and bend-average curvature, suggesting that intermittent bank collapse plays a prominent geomorphic role in mildly curved rivers. Numerical modeling further demonstrates that intermittent bank collapse affects the overall river morphodynamics, accelerating lateral migration and enhancing floodplain reworking. By illustrating intermittent bank collapse as a significant mechanism of river width adjustment, our findings refine classical fluvial geomorphology theory and hold implications for river restoration and organic carbon flux estimation in a warming eraThis study was supported by the National Key R&D Program of China (2022YFC3106204) and National Natural Science Foundation of China (52201318 and 42376168). K.Z. acknowledges support from the Horizon Europe Marie SkÅ‚odowska-Curie Actions Postdoctoral Fellowships (Project Name: CarbTMM, 101146339)This work contributes to the Institut de Ciències del Mar "Severo Ochoa Centre of Excellence" accreditation CEX2024-001494-S funded by AEI 10.13039/501100011033 of the Spanish Ministry of Science and InnovationPeer reviewedNational Academy of Sciences (U.S.)Agencia Estatal de Investigación (España)National Natural Science Foundation of ChinaEuropean Commission202620262026info:eu-repo/semantics/articlePublisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/432382https://api.elsevier.com/content/abstract/scopus_id/105035305064reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/HE/101146339Proceedings of the National Academy of Sciences of the United States of AmericaZhao, Kun; Lanzoni, Stefano; Coco, Giovanni; Xu, Fan; Zhang, Kaili; Gong, Zheng; 2026; Supporting information Variability in alluvial river width driven by intermittent bank collapse [Dataset]; National Academy of Sciences; https://doi.org/10.1073/pnas.2525442123https://doi.org/10.1073/pnas.252544212Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::ccb0de553a3530d217d23106a9f218032026-05-22T06:33:51Z
dc.title.none.fl_str_mv Variability in alluvial river width driven by intermittent bank collapse
title Variability in alluvial river width driven by intermittent bank collapse
spellingShingle Variability in alluvial river width driven by intermittent bank collapse
Zhao, Kun
Alluvial rivers
Intermittent bank collapse
Meander dynamics
Width variability
title_short Variability in alluvial river width driven by intermittent bank collapse
title_full Variability in alluvial river width driven by intermittent bank collapse
title_fullStr Variability in alluvial river width driven by intermittent bank collapse
title_full_unstemmed Variability in alluvial river width driven by intermittent bank collapse
title_sort Variability in alluvial river width driven by intermittent bank collapse
dc.creator.none.fl_str_mv Zhao, Kun
Lanzoni, Stefano
Coco, Giovanni
Xu, Fan
Zhang, Kaili
Gong, Zheng
author Zhao, Kun
author_facet Zhao, Kun
Lanzoni, Stefano
Coco, Giovanni
Xu, Fan
Zhang, Kaili
Gong, Zheng
author_role author
author2 Lanzoni, Stefano
Coco, Giovanni
Xu, Fan
Zhang, Kaili
Gong, Zheng
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
National Natural Science Foundation of China
European Commission
dc.subject.none.fl_str_mv Alluvial rivers
Intermittent bank collapse
Meander dynamics
Width variability
topic Alluvial rivers
Intermittent bank collapse
Meander dynamics
Width variability
description 10 pages, 5 figures, supporting information https://doi.org/10.1073/pnas.252544212.-- Data, Materials, and Software Availability: Data used to analyze channel width are available on Zenodo (DOI: https://doi.org/10.5281/zenodo.18077121) (94). Additional data are included in the article and/or supporting information
publishDate 2026
dc.date.none.fl_str_mv 2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/432382
https://api.elsevier.com/content/abstract/scopus_id/105035305064
url http://hdl.handle.net/10261/432382
https://api.elsevier.com/content/abstract/scopus_id/105035305064
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/HE/101146339
Proceedings of the National Academy of Sciences of the United States of America
Zhao, Kun; Lanzoni, Stefano; Coco, Giovanni; Xu, Fan; Zhang, Kaili; Gong, Zheng; 2026; Supporting information Variability in alluvial river width driven by intermittent bank collapse [Dataset]; National Academy of Sciences; https://doi.org/10.1073/pnas.2525442123
https://doi.org/10.1073/pnas.252544212
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv National Academy of Sciences (U.S.)
publisher.none.fl_str_mv National Academy of Sciences (U.S.)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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repository.name.fl_str_mv
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