Version 1
: Received: 1 August 2018 / Approved: 1 August 2018 / Online: 1 August 2018 (19:56:03 CEST)
How to cite:
Török, G.T.; Józsa, J.; Baranya, S. A Shear Reynolds Number Based Investigation Method of the Bed Load Transport in Large Rivers with Complex Morphodynamics. Preprints2018, 2018080028. https://doi.org/10.20944/preprints201808.0028.v1
Török, G.T.; Józsa, J.; Baranya, S. A Shear Reynolds Number Based Investigation Method of the Bed Load Transport in Large Rivers with Complex Morphodynamics. Preprints 2018, 2018080028. https://doi.org/10.20944/preprints201808.0028.v1
Török, G.T.; Józsa, J.; Baranya, S. A Shear Reynolds Number Based Investigation Method of the Bed Load Transport in Large Rivers with Complex Morphodynamics. Preprints2018, 2018080028. https://doi.org/10.20944/preprints201808.0028.v1
APA Style
Török, G.T., Józsa, J., & Baranya, S. (2018). A Shear Reynolds Number Based Investigation Method of the Bed Load Transport in Large Rivers with Complex Morphodynamics. Preprints. https://doi.org/10.20944/preprints201808.0028.v1
Chicago/Turabian Style
Török, G.T., János Józsa and Sándor Baranya. 2018 "A Shear Reynolds Number Based Investigation Method of the Bed Load Transport in Large Rivers with Complex Morphodynamics" Preprints. https://doi.org/10.20944/preprints201808.0028.v1
Abstract
The aim of this study is to introduce a novel method which can separate sand or gravel dominated bed load transport in rivers with mixed-size bed material. In engineering practice, the Shields-Parker diagram could be used for such purposes, however, the method has certain applicability limits, due to the fact that it is based on uniform bed material and provides information rather on river-scale, instead of reach or local scale. When dealing with large rivers with complex hydrodynamics and morphodynamics the bed load transport modes can also indicate strong variation even locally, which requires a more suitable approach to estimate the locally unique behavior of the sediment transport. Here, we suggest that the decision criteria utilizes the shear Reynolds number (Re*). The method was verified against field and laboratory measurement data, both performed at non-uniform bed material compositions. The comparative assessment of the results show that the shear Reynolds number based method operates more reliably than the Shields-Parker diagram and it is expected to predict the sand or gravel transport domination with a < 5% uncertainty. The introduced results can greatly contribute to the improvement of numerical sediment transport modeling as well as to the field implementation of bed load transport measurements.
Keywords
bed load transport; shear Reynolds number; mixed-size bed material; complex morphodynamics
Subject
Environmental and Earth Sciences, Environmental Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
