Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends
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| Format: | Artículo científico |
| Langue: | en |
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Pontificia Universidad Católica de Valparaíso
2002
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| _version_ | 1876479496121483264 |
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| author | Marco Cisternas |
| author_facet | Marco Cisternas |
| contents | Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends Marco Cisternas Felipe Ríos Jacobus Le Roux Iran Corrêa Ciencias de la Tierra grain size trends Lirquén Harbor southern Chile sediment transport pathways Bottom sediment samples were collected in June and December 1997 at 166 stations on a rectangulargrid in a small port (Lirquén Harbor, BíoBío Region, Central Southern Chile) facing siltation problems with a view todetermining local seasonal sediment transport pathways through the application of three different methodologiesbased on grain-size trends. Measured winds and near-bottom currents together with hindcast wave allowed to establishingthe influence of the prevailing meteorological and hydrodynamic conditions on local sediment circulation. The resultssuggest that transport of deep and shallow water sediments occur rarely under high-energy conditions. The currentdata 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 ofthe study area and sediment dispersal patterns on aerial photographs. The results yielded by the grain-size trendmethodologies of Gao-Collins (1992) and Le Roux (1994b) indicate a possible seasonal variation in transport pathwaysagreeing with the prevailing meteo-hydrodynamic conditions, whereas the McLaren-Bowles (1985) approach doesnot show a significant difference. It is suggested that the latter methodology may represent transport on a spatialmacroscale as opposed to the mesoscale patterns yielded by the other two techniques. Based on the results of the threegrain-size trend methodologies, the observed current and wind data, the hindcast wave data and aerial photographs aconceptual model of net annual sediment transport is proposed for Lirquén Harbour. 2002 artículo científico 0716-1069 https://www.redalyc.org/articulo.oa?id=45630101 en http://www.redalyc.org/revista.oa?id=456 Investigaciones Marinas application/pdf Pontificia Universidad Católica de Valparaíso Investigaciones Marinas (Chile) Num.1 Vol.30 |
| format | Artículo científico |
| id | redalyc_45630101 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Pontificia Universidad Católica de Valparaíso |
| spellingShingle | Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends Marco Cisternas Ciencias de la Tierra grain size trends Lirquén Harbor southern Chile sediment transport pathways Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends Marco Cisternas Felipe Ríos Jacobus Le Roux Iran Corrêa Ciencias de la Tierra grain size trends Lirquén Harbor southern Chile sediment transport pathways Bottom sediment samples were collected in June and December 1997 at 166 stations on a rectangulargrid in a small port (Lirquén Harbor, BíoBío Region, Central Southern Chile) facing siltation problems with a view todetermining local seasonal sediment transport pathways through the application of three different methodologiesbased on grain-size trends. Measured winds and near-bottom currents together with hindcast wave allowed to establishingthe influence of the prevailing meteorological and hydrodynamic conditions on local sediment circulation. The resultssuggest that transport of deep and shallow water sediments occur rarely under high-energy conditions. The currentdata 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 ofthe study area and sediment dispersal patterns on aerial photographs. The results yielded by the grain-size trendmethodologies of Gao-Collins (1992) and Le Roux (1994b) indicate a possible seasonal variation in transport pathwaysagreeing with the prevailing meteo-hydrodynamic conditions, whereas the McLaren-Bowles (1985) approach doesnot show a significant difference. It is suggested that the latter methodology may represent transport on a spatialmacroscale as opposed to the mesoscale patterns yielded by the other two techniques. Based on the results of the threegrain-size trend methodologies, the observed current and wind data, the hindcast wave data and aerial photographs aconceptual model of net annual sediment transport is proposed for Lirquén Harbour. 2002 artículo científico 0716-1069 https://www.redalyc.org/articulo.oa?id=45630101 en http://www.redalyc.org/revista.oa?id=456 Investigaciones Marinas application/pdf Pontificia Universidad Católica de Valparaíso Investigaciones Marinas (Chile) Num.1 Vol.30 |
| title | Seasonal sediment transport pathways in Lirquen Harbor, Chile, as inferred from grain-size trends |
| topic | Ciencias de la Tierra grain size trends Lirquén Harbor southern Chile sediment transport pathways |
| url | https://www.redalyc.org/articulo.oa?id=45630101 |