Rate of Deposition of Fine Sediment from Suspension
Publication: Journal of Hydraulic Engineering
Volume 132, Issue 5
Abstract
Standard depth-integrated models of sediment dynamics predict that concentrations of suspended fine sediment should decay at a characteristic rate that is controlled by the particle settling velocity and the depth of the water. In contrast, a model which resolves the processes of settling and dispersion in the water column has suggested that this decay rate should be independent of the settling velocity, and is controlled by dispersive processes in the water column. By revisiting the problem of sediment dispersion and settling following a point release of material, we resolve this discrepancy and confirm that depth-integrated models capture the correct physical behavior.
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Acknowledgment
The writer was supported by an NERC postdoctoral fellowship (Ref. NE/B50188X/1).
References
Bolla Pitaluga, M., and Seminara, G. (2003). “Depth-integrated modelling of suspended sediment transport.” Water Resour. Res., 39(5), 1137.
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Stansby, P. K., and Awang, M. A. O. (1998). “Response time analysis for suspended sediment transport.” J. Hydraul. Res., 36(3), 327–338.
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© 2006 ASCE.
History
Received: Feb 8, 2004
Accepted: Jul 20, 2005
Published online: May 1, 2006
Published in print: May 2006
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