Flow and sediment suspension events over low-angle dunes: Fraser Estuary, Canada

The morphodynamics of large sand‐bedded rivers and estuaries are ultimately controlled by the way bed material is moved and the development of large, subaqueous sand dunes that control hydraulic flow resistance. It is widely thought that the primary mechanism for moving sandy bed material in these c...

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Bibliographic Details
Published in:Journal of geophysical research. Earth surface 2013-09, Vol.118 (3), p.1693-1709
Main Authors: Bradley, R.W., Venditti, J. G., Kostaschuk, R. A., Church, M., Hendershot, M., Allison, M. A.
Format: Article
Language:English
Subjects:
Brackish
Channels
Dunes
Estuaries
Flow resistance
Flow separation
Freshwater
Geomorphology
River beds
Saline water
Saline-freshwater interfaces
Salt water
Salts
Sand
sand-bedded rivers
Sediment transport
Sedimentary structures
Sediments
Suspended sediments
suspension
Tides
Unsteady flow
Upwelling
variable flow
Water column
Wedges
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Summary:The morphodynamics of large sand‐bedded rivers and estuaries are ultimately controlled by the way bed material is moved and the development of large, subaqueous sand dunes that control hydraulic flow resistance. It is widely thought that the primary mechanism for moving sandy bed material in these channels is large‐scale coherent flow structures that cause suspension events whose properties vary with flow, especially in tidally influenced environments. Here, we examine mean flow and sediment suspension events over low‐angle dunes (lee face angle
ISSN:2169-9003
2169-9011
DOI:10.1002/jgrf.20118