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Alternate Bars in and Meandering of Alluvial Rivers: Communications on Hydraulics
The paper presents a linear perturbation analysis of a horizontal two-dimensional mathematical model for the flow and bed topography in straight alluvial rivers with dominant bed-load. A sediment transport model including effects of transverse bed slope, secondary (helical) flow and secondary flow inertia is employed. The stability and the propagation velocity of an unsteady perturbation is investigated. This stability analysis predicts wave lengths which are in good agreement with the wave lengths of alternate bars in straight laboratory flumes. The analysis predicts rather large propagation velocities of the perturbations. Several investigations have assumed the instability to cause meandering and braiding of rivers.
Alternate Bars in and Meandering of Alluvial Rivers: Communications on Hydraulics
The paper presents a linear perturbation analysis of a horizontal two-dimensional mathematical model for the flow and bed topography in straight alluvial rivers with dominant bed-load. A sediment transport model including effects of transverse bed slope, secondary (helical) flow and secondary flow inertia is employed. The stability and the propagation velocity of an unsteady perturbation is investigated. This stability analysis predicts wave lengths which are in good agreement with the wave lengths of alternate bars in straight laboratory flumes. The analysis predicts rather large propagation velocities of the perturbations. Several investigations have assumed the instability to cause meandering and braiding of rivers.
Alternate Bars in and Meandering of Alluvial Rivers: Communications on Hydraulics
K. W. Olesen (author)
1983
26 pages
Report
No indication
English
Civil Engineering , Hydrology & Limnology , Sediment transport , Stream flow , Submarine topography , Rivers , Alluvium , Mathematical models , Bed load , Slope , Inertia , Flumes , Channels(Waterways) , Steady state , Water waves , Damping , Foreign technology , Meandering rivers , Bars , Alluvial channels
Hydraulics of meandering rivers with flood plains
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