Grain sorting is a process observed in fluvial, coastal, and estuarian environments whereby the selective transport of different fractions of a sediment mixture gives rise to a non-uniform spatial distribution of the grain size probability density function. The formation of some fluvial bedforms (bedloadsheets and sand ridges) is shown to be generated or dominantly controlled by grain sorting. However, most bedforms (river dunes, free and forced fluvial bars, coastal ripples) are moderately affected by the sorting mechanism which is invariably found to lead to a damping effect on bedform growth. Recent investigations of the above phenomena are reviewed and new methodologic aspects arising in treating the instability of flow and bed topography in the presence of mixtures are pointed out.
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September 1995
Review Articles
Effect of Grain Sorting on the Formation of Bedforms
Giovanni Seminara
Giovanni Seminara
Istituto di Idraulica, Universita` di Genova, Via Montallegro 1, 16145 Genova, Italy
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Giovanni Seminara
Istituto di Idraulica, Universita` di Genova, Via Montallegro 1, 16145 Genova, Italy
Appl. Mech. Rev. Sep 1995, 48(9): 549-563 (15 pages)
Published Online: September 1, 1995
Article history
Online:
April 29, 2009
Citation
Seminara, G. (September 1, 1995). "Effect of Grain Sorting on the Formation of Bedforms." ASME. Appl. Mech. Rev. September 1995; 48(9): 549–563. https://doi.org/10.1115/1.3023144
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