A long-term flood record from the Buffels River, the largest ephemeral river of NW South Africa (9250 km2), was reconstructed based on interpretation of palaeoflood, documentary and instrumental rainfall data. Palaeoflood data were obtained at three study reaches, with preserved sedimentary evidence...

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Fecha de publicación:
2011
Institución:
Universidad de Medellín
Repositorio:
Repositorio UDEM
Idioma:
eng
OAI Identifier:
oai:repository.udem.edu.co:11407/1382
Acceso en línea:
http://hdl.handle.net/11407/1382
Palabra clave:
Buffels River
Palaeoclimate
Palaeofloods
Palaeohydrology
Southern Africa
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restrictedAccess
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http://purl.org/coar/access_right/c_16ec
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oai_identifier_str oai:repository.udem.edu.co:11407/1382
network_acronym_str REPOUDEM2
network_name_str Repositorio UDEM
repository_id_str
spelling 2015-10-09T13:18:22Z2015-10-09T13:18:22Z2011335894http://hdl.handle.net/11407/138210.1016/j.yqres.2011.01.004A long-term flood record from the Buffels River, the largest ephemeral river of NW South Africa (9250 km2), was reconstructed based on interpretation of palaeoflood, documentary and instrumental rainfall data. Palaeoflood data were obtained at three study reaches, with preserved sedimentary evidence indicating at least 25 large floods during the last 700yr. Geochronological control for the palaeoflood record was provided by radiocarbon and optically stimulated luminescence (OSL) dating. Annual resolution was obtained since the 19th century using the overlapping documentary and instrumental records. Large floods coincided in the past within three main hydroclimatic settings: (1) periods of regular large flood occurrence (1 large flood/~30yr) under wetter and cooler prevailing climatic conditions (AD 1600-1800), (2) decreasing occurrence of large floods (1 large flood/~100yr) during warmer conditions (e.g., AD 1425-1600 and after 1925), and (3) periods of high frequency of large floods (~4-5 large floods in 20-30yr) coinciding with wetter conditions of decadal duration, namely at AD 1390-1425, 1800-1825 and 1915-1925. These decadal-scale periods of the highest flood frequency seem to correspond in time with changes in atmospheric circulation patterns, as inferred when comparing their onset and distribution with temperature proxies in southern Africa. © 2011 University of Washington.enghttp://www.sciencedirect.com/science/article/pii/S0033589411000159Quaternary Research, mayo de 2011, volume 75, issue 3, pp 471-482ScopusArticleinfo:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1info:eu-repo/semantics/restrictedAccesshttp://purl.org/coar/access_right/c_16ecMuseo Nacional de Ciencias Naturales, CSIC, Serrano 115bis, 28006 Madrid, SpainDepartment of Geography, Royal Holloway University of London, Egham, Surrey TW20 0EX, United KingdomPyrenean Institute of Ecology CSIC, Avda. Montañana 1005, 50059 Zaragoza, SpainInstitute of Geosciences, CSIC-Universidad Complutense, 28040 Madrid, SpainFacultad de Ingeniería, Universidad de Medellín, Medellín, ColombiaInstitute of Earth Sciences, The Hebrew University of Jerusalem Givat Ram, Jerusalem 91904, IsraelGeological Survey of Israel, 30, Malkhe Israel St, Jerusalem, 95501, IsraelCenieh-National Research Centre on Human Evolution, Paseo de la Sierra de Atapuerca s/n, 09002 Burgos, SpainBenito G.Thorndycraft V.R.Rico M.T.Sanchez-Moya Y.Sopena A.Botero B.A.Machado M.J.Davis M.Perez-Gonzalez A.Buffels RiverPalaeoclimatePalaeofloodsPalaeohydrologySouthern AfricaHydrological response of a dryland ephemeral river to southern African climatic variability during the last millennium11407/1382oai:repository.udem.edu.co:11407/13822020-05-27 18:28:52.86Repositorio Institucional Universidad de Medellinrepositorio@udem.edu.co
dc.title.english.eng.fl_str_mv Hydrological response of a dryland ephemeral river to southern African climatic variability during the last millennium
dc.contributor.affiliation.spa.fl_str_mv Museo Nacional de Ciencias Naturales, CSIC, Serrano 115bis, 28006 Madrid, Spain
Department of Geography, Royal Holloway University of London, Egham, Surrey TW20 0EX, United Kingdom
Pyrenean Institute of Ecology CSIC, Avda. Montañana 1005, 50059 Zaragoza, Spain
Institute of Geosciences, CSIC-Universidad Complutense, 28040 Madrid, Spain
Facultad de Ingeniería, Universidad de Medellín, Medellín, Colombia
Institute of Earth Sciences, The Hebrew University of Jerusalem Givat Ram, Jerusalem 91904, Israel
Geological Survey of Israel, 30, Malkhe Israel St, Jerusalem, 95501, Israel
Cenieh-National Research Centre on Human Evolution, Paseo de la Sierra de Atapuerca s/n, 09002 Burgos, Spain
dc.subject.keyword.eng.fl_str_mv Buffels River
Palaeoclimate
Palaeofloods
Palaeohydrology
Southern Africa
topic Buffels River
Palaeoclimate
Palaeofloods
Palaeohydrology
Southern Africa
spellingShingle Buffels River
Palaeoclimate
Palaeofloods
Palaeohydrology
Southern Africa
description A long-term flood record from the Buffels River, the largest ephemeral river of NW South Africa (9250 km2), was reconstructed based on interpretation of palaeoflood, documentary and instrumental rainfall data. Palaeoflood data were obtained at three study reaches, with preserved sedimentary evidence indicating at least 25 large floods during the last 700yr. Geochronological control for the palaeoflood record was provided by radiocarbon and optically stimulated luminescence (OSL) dating. Annual resolution was obtained since the 19th century using the overlapping documentary and instrumental records. Large floods coincided in the past within three main hydroclimatic settings: (1) periods of regular large flood occurrence (1 large flood/~30yr) under wetter and cooler prevailing climatic conditions (AD 1600-1800), (2) decreasing occurrence of large floods (1 large flood/~100yr) during warmer conditions (e.g., AD 1425-1600 and after 1925), and (3) periods of high frequency of large floods (~4-5 large floods in 20-30yr) coinciding with wetter conditions of decadal duration, namely at AD 1390-1425, 1800-1825 and 1915-1925. These decadal-scale periods of the highest flood frequency seem to correspond in time with changes in atmospheric circulation patterns, as inferred when comparing their onset and distribution with temperature proxies in southern Africa. © 2011 University of Washington.
publishDate 2011
dc.date.created.none.fl_str_mv 2011
dc.date.accessioned.none.fl_str_mv 2015-10-09T13:18:22Z
dc.date.available.none.fl_str_mv 2015-10-09T13:18:22Z
dc.type.eng.fl_str_mv Article
dc.type.coar.fl_str_mv http://purl.org/coar/resource_type/c_6501
http://purl.org/coar/resource_type/c_2df8fbb1
dc.type.driver.none.fl_str_mv info:eu-repo/semantics/article
dc.identifier.issn.none.fl_str_mv 335894
dc.identifier.uri.none.fl_str_mv http://hdl.handle.net/11407/1382
dc.identifier.doi.none.fl_str_mv 10.1016/j.yqres.2011.01.004
identifier_str_mv 335894
10.1016/j.yqres.2011.01.004
url http://hdl.handle.net/11407/1382
dc.language.iso.none.fl_str_mv eng
language eng
dc.relation.isversionof.spa.fl_str_mv http://www.sciencedirect.com/science/article/pii/S0033589411000159
dc.relation.ispartofen.eng.fl_str_mv Quaternary Research, mayo de 2011, volume 75, issue 3, pp 471-482
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_16ec
dc.rights.accessrights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://purl.org/coar/access_right/c_16ec
dc.source.spa.fl_str_mv Scopus
institution Universidad de Medellín
repository.name.fl_str_mv Repositorio Institucional Universidad de Medellin
repository.mail.fl_str_mv repositorio@udem.edu.co
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