Using bedform migration and orientation to infer sediment transport pathways in a sandy braided river

C. A. Unsworth; A. P. Nicholas; P. J. Ashworth; C. J. Simpson; J. L. Best; S. N. Lane; D. R. Parsons; G. H. Sambrook Smith

Using bedform migration and orientation to infer sediment transport pathways in a sandy braided river

C. A. Unsworth, A. P. Nicholas, P. J. Ashworth, C. J. Simpson, J. L. Best, S. N. Lane, D. R. Parsons, G. H. Sambrook Smith

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Abstract

The morphodynamics of sandy braided rivers are complicated by the presence of bedforms, which alter the spatial distribution of momentum, shear and sediment transport. These effects are not understood well and are typically simplified in morphodynamic models. This paper presents acoustic Doppler Current Profiler (aDcp) measurements of flow, and Unmanned Aerial Vehicle (UAV) photogrammetric surveys of a 600 m reach of the sandy braided South Saskatchewan River, Canada. The response of alluvial bedforms to varying flow direction, bed-slope and sediment availability is examined, and the use of bedform crestline tracking to estimate sediment transport direction is discussed.

Original language	English (US)
Title of host publication	River Flow 2016
Subtitle of host publication	Iowa City, USA, July 11-14, 2016
Publisher	CRC Press
Pages	1138-1143
Number of pages	6
ISBN (Electronic)	9781317289128
ISBN (Print)	9781315644479
State	Published - Jun 22 2016

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General Engineering

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abstract = "The morphodynamics of sandy braided rivers are complicated by the presence of bedforms, which alter the spatial distribution of momentum, shear and sediment transport. These effects are not understood well and are typically simplified in morphodynamic models. This paper presents acoustic Doppler Current Profiler (aDcp) measurements of flow, and Unmanned Aerial Vehicle (UAV) photogrammetric surveys of a 600 m reach of the sandy braided South Saskatchewan River, Canada. The response of alluvial bedforms to varying flow direction, bed-slope and sediment availability is examined, and the use of bedform crestline tracking to estimate sediment transport direction is discussed.",

author = "Unsworth, {C. A.} and Nicholas, {A. P.} and Ashworth, {P. J.} and Simpson, {C. J.} and Best, {J. L.} and Lane, {S. N.} and Parsons, {D. R.} and {Sambrook Smith}, {G. H.}",

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AU - Unsworth, C. A.

AU - Nicholas, A. P.

AU - Ashworth, P. J.

AU - Simpson, C. J.

AU - Best, J. L.

AU - Lane, S. N.

AU - Parsons, D. R.

AU - Sambrook Smith, G. H.

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AB - The morphodynamics of sandy braided rivers are complicated by the presence of bedforms, which alter the spatial distribution of momentum, shear and sediment transport. These effects are not understood well and are typically simplified in morphodynamic models. This paper presents acoustic Doppler Current Profiler (aDcp) measurements of flow, and Unmanned Aerial Vehicle (UAV) photogrammetric surveys of a 600 m reach of the sandy braided South Saskatchewan River, Canada. The response of alluvial bedforms to varying flow direction, bed-slope and sediment availability is examined, and the use of bedform crestline tracking to estimate sediment transport direction is discussed.

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Using bedform migration and orientation to infer sediment transport pathways in a sandy braided river

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