Effect of initial step height on headcut development in upland concentrated flows

Experiments were conducted to examine the effect of initial step height on growth, development, and upstream migration of headcuts in concentrated flows typical of rills, crop furrows, and ephemeral gullies. In a laboratory channel, packed soil beds were constructed with preformed headcuts ranging i...

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Detalhes bibliográficos
Autores: Bennett, S.J., Casalí Sarasíbar, Javier
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2001
País:España
Recursos:Universidad Pública de Navarra
Repositório:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/31506
Acesso em linha:https://hdl.handle.net/2454/31506
Access Level:Acceso aberto
Palavra-chave:Initial step hight
Headcuts
Upland concentrated flows
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spelling Effect of initial step height on headcut development in upland concentrated flowsBennett, S.J.Casalí Sarasíbar, JavierInitial step hightHeadcutsUpland concentrated flowsExperiments were conducted to examine the effect of initial step height on growth, development, and upstream migration of headcuts in concentrated flows typical of rills, crop furrows, and ephemeral gullies. In a laboratory channel, packed soil beds were constructed with preformed headcuts ranging in height from 5 to 50 mm. Each bed was subjected to the same simulated rain, which produced a protective surface seal, followed by an overland flow, which caused soil erosion exclusively at the headcut. After a brief period of bed adjustment, migration rate, scour hole geometry, and sediment yield reached asymptotic values, but the time and length required to reach these asymptotes decreased as the initial step height increased. Steady state headcut dimensions, sediment yield, and the slope of the sediment deposit increased as initial step height increased, but sediment sorting patterns downstream of the migrating headcut remained unchanged.American Geophysical UnionWileyProyectos e Ingeniería RuralLanda Ingeniaritza eta Proiektuak2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2454/31506reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2001 by the American Geophysical Unioninfo:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/315062026-06-17T12:41:47Z
dc.title.none.fl_str_mv Effect of initial step height on headcut development in upland concentrated flows
title Effect of initial step height on headcut development in upland concentrated flows
spellingShingle Effect of initial step height on headcut development in upland concentrated flows
Bennett, S.J.
Initial step hight
Headcuts
Upland concentrated flows
title_short Effect of initial step height on headcut development in upland concentrated flows
title_full Effect of initial step height on headcut development in upland concentrated flows
title_fullStr Effect of initial step height on headcut development in upland concentrated flows
title_full_unstemmed Effect of initial step height on headcut development in upland concentrated flows
title_sort Effect of initial step height on headcut development in upland concentrated flows
dc.creator.none.fl_str_mv Bennett, S.J.
Casalí Sarasíbar, Javier
author Bennett, S.J.
author_facet Bennett, S.J.
Casalí Sarasíbar, Javier
author_role author
author2 Casalí Sarasíbar, Javier
author2_role author
dc.contributor.none.fl_str_mv Proyectos e Ingeniería Rural
Landa Ingeniaritza eta Proiektuak
dc.subject.none.fl_str_mv Initial step hight
Headcuts
Upland concentrated flows
topic Initial step hight
Headcuts
Upland concentrated flows
description Experiments were conducted to examine the effect of initial step height on growth, development, and upstream migration of headcuts in concentrated flows typical of rills, crop furrows, and ephemeral gullies. In a laboratory channel, packed soil beds were constructed with preformed headcuts ranging in height from 5 to 50 mm. Each bed was subjected to the same simulated rain, which produced a protective surface seal, followed by an overland flow, which caused soil erosion exclusively at the headcut. After a brief period of bed adjustment, migration rate, scour hole geometry, and sediment yield reached asymptotic values, but the time and length required to reach these asymptotes decreased as the initial step height increased. Steady state headcut dimensions, sediment yield, and the slope of the sediment deposit increased as initial step height increased, but sediment sorting patterns downstream of the migrating headcut remained unchanged.
publishDate 2001
dc.date.none.fl_str_mv 2001
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/31506
url https://hdl.handle.net/2454/31506
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv © 2001 by the American Geophysical Union
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © 2001 by the American Geophysical Union
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
Wiley
publisher.none.fl_str_mv American Geophysical Union
Wiley
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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