Bedform Migration and Related Sediment Transport in a Meander Bend

  1. M. Marzo and
  2. C. Puigdefábregas
  1. J. Kisling-Møller

Published Online: 14 APR 2009

DOI: 10.1002/9781444303995.ch5

Alluvial Sedimentation

Alluvial Sedimentation

How to Cite

Kisling-Møller, J. (2009) Bedform Migration and Related Sediment Transport in a Meander Bend, in Alluvial Sedimentation (eds M. Marzo and C. Puigdefábregas), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303995.ch5

Editor Information

  1. Barcelona, Spain

Author Information

  1. Institute of Geography, University of Copenhagen, 1350, Copenhagen K, Denmark

Publication History

  1. Published Online: 14 APR 2009
  2. Published Print: 16 SEP 1993

ISBN Information

Print ISBN: 9780632035458

Online ISBN: 9781444303995

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Keywords:

  • bedform transport and dynamics of bedforms;
  • Change of dune height during migration;
  • Bedform migration on the point bar platform;
  • bedforms are moving downstream on the platform;
  • sediment transportation across the point bar platform;
  • NO sediment transport at the bend exit

Summary

This case study deals with bedform transport and the dynamics of bedforms in an alluvial, sand bedded meander bend in the river Gels Å, western Jutland, Denmark.

The sediment transport in meander bends is found to be greatly influenced by the existence of bedforms. If the dune crests are oblique to the near-bed flow direction, a net transverse current is created in the separation cell in front of the dune. This process is of special importance to the direction and degree of material transport through meander bends. The use of dune orthogonals is presented to describe and quantify the transverse sediment transport in the leeside troughs in front of migrating dunes, and the method is tested with field data. On the basis of repeated surveys of the bed configuration the migration pattern, the rate of the transverse sediment transport and its variation through the meander bend are investigated.