Caracterización y clasificación de la bahía de Puerto Montt mediante batimetría de multihaz y datos de backscatter

Resultado de la investigación: Article

1 Cita (Scopus)

Resumen

A high resolution multibeam bathymetric survey was carried out in Puerto Montt bay, Chile. Moreover, intensity data derived from acoustic signals reflected by the sea bottom was gathered using the same sonar system; the ratio was calculated between emitted and backscattered energy. The resulting topographic model shows a soft coastal platform and an abrupt slope. There are small submarine channels in the slope zone and a main channel in the central bay zone that could be related to the depression associated with the Tenglo channel. These channels act as conduits for the sediment transport from shallow to deep waters. The backscatter information was used in order to classify seabed sediments, subsequently confirmed by analyzing sediment samples from the respective sites. Coarse sediments feature higher intensities or backscatter signals than fine sediments. Muddy sands generally prevail in the investigation area. However, coarse material tends to concentrate in shallow waters and fine material in deep sectors. Sediment transport in the interior and the mouths of Tenglo channel in strongly influenced by tide currents. This does not hold for material transport occurring on the slope and in the deeper parts of the bay, where other mechanisms, such as turbidity currents, are more important.

Idioma originalSpanish
Páginas (desde-hasta)83-94
Número de páginas12
PublicaciónInvestigaciones Marinas
Volumen34
N.º1
EstadoPublished - 2006

Huella dactilar

bathymetry
backscatter
sediments
sediment transport
sediment
submarine channel
bathymetric survey
turbidity current
sonar
turbidity
tides
Chile
acoustics
mouth
tide
shallow water
deep water
concentrates
sand
energy

ASJC Scopus subject areas

  • Aquatic Science
  • Oceanography

Citar esto

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title = "Caracterizaci{\'o}n y clasificaci{\'o}n de la bah{\'i}a de Puerto Montt mediante batimetr{\'i}a de multihaz y datos de backscatter",
abstract = "A high resolution multibeam bathymetric survey was carried out in Puerto Montt bay, Chile. Moreover, intensity data derived from acoustic signals reflected by the sea bottom was gathered using the same sonar system; the ratio was calculated between emitted and backscattered energy. The resulting topographic model shows a soft coastal platform and an abrupt slope. There are small submarine channels in the slope zone and a main channel in the central bay zone that could be related to the depression associated with the Tenglo channel. These channels act as conduits for the sediment transport from shallow to deep waters. The backscatter information was used in order to classify seabed sediments, subsequently confirmed by analyzing sediment samples from the respective sites. Coarse sediments feature higher intensities or backscatter signals than fine sediments. Muddy sands generally prevail in the investigation area. However, coarse material tends to concentrate in shallow waters and fine material in deep sectors. Sediment transport in the interior and the mouths of Tenglo channel in strongly influenced by tide currents. This does not hold for material transport occurring on the slope and in the deeper parts of the bay, where other mechanisms, such as turbidity currents, are more important.",
keywords = "Backscatter data, Chile, Marine sediments, Multibeam bathymetry, Puerto Montt, Submarine topography",
author = "Cristi{\'a}n Rodrigo",
year = "2006",
language = "Spanish",
volume = "34",
pages = "83--94",
journal = "Latin American Journal of Aquatic Research",
issn = "0718-560X",
publisher = "Pontificia Universidad Catolica de Valparaiso",
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T1 - Caracterización y clasificación de la bahía de Puerto Montt mediante batimetría de multihaz y datos de backscatter

AU - Rodrigo, Cristián

PY - 2006

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N2 - A high resolution multibeam bathymetric survey was carried out in Puerto Montt bay, Chile. Moreover, intensity data derived from acoustic signals reflected by the sea bottom was gathered using the same sonar system; the ratio was calculated between emitted and backscattered energy. The resulting topographic model shows a soft coastal platform and an abrupt slope. There are small submarine channels in the slope zone and a main channel in the central bay zone that could be related to the depression associated with the Tenglo channel. These channels act as conduits for the sediment transport from shallow to deep waters. The backscatter information was used in order to classify seabed sediments, subsequently confirmed by analyzing sediment samples from the respective sites. Coarse sediments feature higher intensities or backscatter signals than fine sediments. Muddy sands generally prevail in the investigation area. However, coarse material tends to concentrate in shallow waters and fine material in deep sectors. Sediment transport in the interior and the mouths of Tenglo channel in strongly influenced by tide currents. This does not hold for material transport occurring on the slope and in the deeper parts of the bay, where other mechanisms, such as turbidity currents, are more important.

AB - A high resolution multibeam bathymetric survey was carried out in Puerto Montt bay, Chile. Moreover, intensity data derived from acoustic signals reflected by the sea bottom was gathered using the same sonar system; the ratio was calculated between emitted and backscattered energy. The resulting topographic model shows a soft coastal platform and an abrupt slope. There are small submarine channels in the slope zone and a main channel in the central bay zone that could be related to the depression associated with the Tenglo channel. These channels act as conduits for the sediment transport from shallow to deep waters. The backscatter information was used in order to classify seabed sediments, subsequently confirmed by analyzing sediment samples from the respective sites. Coarse sediments feature higher intensities or backscatter signals than fine sediments. Muddy sands generally prevail in the investigation area. However, coarse material tends to concentrate in shallow waters and fine material in deep sectors. Sediment transport in the interior and the mouths of Tenglo channel in strongly influenced by tide currents. This does not hold for material transport occurring on the slope and in the deeper parts of the bay, where other mechanisms, such as turbidity currents, are more important.

KW - Backscatter data

KW - Chile

KW - Marine sediments

KW - Multibeam bathymetry

KW - Puerto Montt

KW - Submarine topography

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M3 - Article

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VL - 34

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JO - Latin American Journal of Aquatic Research

JF - Latin American Journal of Aquatic Research

SN - 0718-560X

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