Dynamics of Bed Load Transport in the Parsȩta River Channel, Poland

  1. M. Marzo and
  2. C. Puigdefábregas
  1. Zb. Zwoliński

Published Online: 14 APR 2009

DOI: 10.1002/9781444303995.ch7

Alluvial Sedimentation

Alluvial Sedimentation

How to Cite

Zwoliński, Zb. (1993) Dynamics of Bed Load Transport in the Parsȩta River Channel, Poland, in Alluvial Sedimentation (eds M. Marzo and C. Puigdefábregas), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303995.ch7

Editor Information

  1. Barcelona, Spain

Author Information

  1. Quaternary Research Institute, Adam Mickiewicz University, Fredry 10, 61-701 Poznań, Poland

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:

  • Dynamics of bed load transport;
  • average grain diameter-median- grain population of a sediment sample;
  • parameter- in common- hydraulic radius of a channel;
  • mean values of the bed material median- Parseta River-included;
  • No grain sizes morphological types of cross-sections found;
  • The transport rates of bed loads-vary

Summary

Three channel cross-section types have been selected for three Parsȩta River reaches. They represent a variety of channel patterns with straight sections and bends with a high and low curvature ratio. Mean annual discharges are 4.6, 13.6 and 35.7 m3 s-1 for selected reaches. Median particle size is largely medium-grained sand (0.24 ≤ d50 ≤ 0.81 mm), occasionally more coarse-grained. These deposits display moderate and good sorting. The Parsȩta bed load is most often transported in the form of sinuous and linguoid-shaped ripple marks, rarely straight-crested ones, and dunes with occasional streaming lineation. Bed material is transported as large bedforms (side, transverse, point and counterpoint bars). The most dynamic changes in the channel bed position take place within low curvature ratio bends (CW < 1.5), and the least changes along straight reaches. The magnitude of these changes is found to reduce downstream. In all cross-sections, the bed material was mobile across 39–90% (average 70%) of the channel width, irrespective of water stage and discharge phase. The bed load amounts calculated using a modified Meyer-Peter & Müller formula range from 0.15 to 0.78 kg s−1. The analysis of the bed load rates reveals their twofold increase in the longitudinal profile of the river. Moreover, a twofold increase in bed load occurred along straight reaches compared with low and high curvature ratio bends. Finally, function models are offered for hydrotechnical applications.