Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends

Bottom sediment samples were collected in June and December 1997 at 166 stations on a rectangular grid in a small port (Lirquén Harbor, BíoBío Region, Central Southern Chile) facing siltation problems with a view to determining local seasonal sediment transport pathways through the application of th...

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Autores principales:	Ríos,Felipe, Cisternas,Marco, Le Roux,jacobus, Corrêa,Iran
Lenguaje:	English
Publicado:	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso 2002
Materias:	sediment transport pathways grain-size trends Lirquén Harbor southern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782002000100001
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spelling	oai:scielo:S0717-717820020001000012003-04-07Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trendsRíos,FelipeCisternas,MarcoLe Roux,jacobusCorrêa,Iran sediment transport pathways grain-size trends Lirquén Harbor southern Chile Bottom sediment samples were collected in June and December 1997 at 166 stations on a rectangular grid in a small port (Lirquén Harbor, BíoBío Region, Central Southern Chile) facing siltation problems with a view to determining local seasonal sediment transport pathways through the application of three different methodologies based on grain-size trends. Measured winds and near-bottom currents together with hindcast wave allowed to establishing the influence of the prevailing meteorological and hydrodynamic conditions on local sediment circulation. The results suggest that transport of deep and shallow water sediments occur rarely under high-energy conditions. The current data suggest that tidal asymmetry would be an important agent of sediment transport in Lirquen Harbor. The sediment transport pathways inferred from grain-size trends are compared with the measured water circulation of the study area and sediment dispersal patterns on aerial photographs. The results yielded by the grain-size trend methodologies of <A HREF="#gao92">Gao-Collins (1992)</A> and <A HREF="#le94b">Le Roux (1994b)</A> indicate a possible seasonal variation in transport pathways agreeing with the prevailing meteo-hydrodynamic conditions, whereas the <A HREF="#mcl85">McLaren-Bowles (1985)</A> approach does not show a significant difference. It is suggested that the latter methodology may represent transport on a spatial macroscale as opposed to the mesoscale patterns yielded by the other two techniques. Based on the results of the three grain-size trend methodologies, the observed current and wind data, the hindcast wave data and aerial photographs a conceptual model of net annual sediment transport is proposed for Lirquén Harbourinfo:eu-repo/semantics/openAccessEscuela de Ciencias del Mar. Pontificia Universidad Católica de ValparaísoInvestigaciones marinas v.30 n.1 20022002-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782002000100001en10.4067/S0717-71782002000100001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	sediment transport pathways grain-size trends Lirquén Harbor southern Chile
spellingShingle	sediment transport pathways grain-size trends Lirquén Harbor southern Chile Ríos,Felipe Cisternas,Marco Le Roux,jacobus Corrêa,Iran Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
description	Bottom sediment samples were collected in June and December 1997 at 166 stations on a rectangular grid in a small port (Lirquén Harbor, BíoBío Region, Central Southern Chile) facing siltation problems with a view to determining local seasonal sediment transport pathways through the application of three different methodologies based on grain-size trends. Measured winds and near-bottom currents together with hindcast wave allowed to establishing the influence of the prevailing meteorological and hydrodynamic conditions on local sediment circulation. The results suggest that transport of deep and shallow water sediments occur rarely under high-energy conditions. The current data suggest that tidal asymmetry would be an important agent of sediment transport in Lirquen Harbor. The sediment transport pathways inferred from grain-size trends are compared with the measured water circulation of the study area and sediment dispersal patterns on aerial photographs. The results yielded by the grain-size trend methodologies of <A HREF="#gao92">Gao-Collins (1992)</A> and <A HREF="#le94b">Le Roux (1994b)</A> indicate a possible seasonal variation in transport pathways agreeing with the prevailing meteo-hydrodynamic conditions, whereas the <A HREF="#mcl85">McLaren-Bowles (1985)</A> approach does not show a significant difference. It is suggested that the latter methodology may represent transport on a spatial macroscale as opposed to the mesoscale patterns yielded by the other two techniques. Based on the results of the three grain-size trend methodologies, the observed current and wind data, the hindcast wave data and aerial photographs a conceptual model of net annual sediment transport is proposed for Lirquén Harbour
author	Ríos,Felipe Cisternas,Marco Le Roux,jacobus Corrêa,Iran
author_facet	Ríos,Felipe Cisternas,Marco Le Roux,jacobus Corrêa,Iran
author_sort	Ríos,Felipe
title	Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
title_short	Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
title_full	Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
title_fullStr	Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
title_full_unstemmed	Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
title_sort	seasonal sediment transport pathways in lirquen harbor, chile, as inferred from grain-size trends
publisher	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782002000100001
work_keys_str_mv	AT riosfelipe seasonalsedimenttransportpathwaysinlirquenharborchileasinferredfromgrainsizetrends AT cisternasmarco seasonalsedimenttransportpathwaysinlirquenharborchileasinferredfromgrainsizetrends AT lerouxjacobus seasonalsedimenttransportpathwaysinlirquenharborchileasinferredfromgrainsizetrends AT correairan seasonalsedimenttransportpathwaysinlirquenharborchileasinferredfromgrainsizetrends
_version_	1718442896905994240

Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends

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