IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
SAND TRANSPORT ON AN ESTUARINE SUBMARINE DUNE FIELD
Autor/es:
GÓMEZ E.A.; CUADRADO D.G.; PIERINI J.O.
Revista:
GEOMORPHOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Liverpool; Año: 2010 vol. 121 p. 257 - 265
ISSN:
0169-555X
Resumen:
By means of surveys carried out with a Phase Measuring Bathymetric System and
current profiles obtained through an ADCP of the internal area of the Bahía Blanca
estuary, a field of large dunes was analysed. There are two different and well-defined
zones characterized by particular dune morphology and differing hydrodynamics.
The reduction in the channel cross-section by a geological control leads to the
increase in tidal current velocity, which together with the available sediment leads to
the formation of Very Large Dunes (H>4 m and L> 100 m) with the typical
morphology of a limited amount of sediment overlying a rigid substrate. The
migration rate of these dunes, between 65 and 130 m yr-1, decreases as the bedform
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error
-1, decreases as the bedform
height increases. Differing sediment transport rates across the channel result in a
non-uniform migration rate, which is responsible for the formation of dunes with
linear crests oblique to the tidal current direction. This fact indicates that
determination of the sediment transport direction by using only large bedform
orientation may be subject to a significant error