Nearly pure sorting waves and formation of bedload sheets. (English) Zbl 0877.76020
Different kinds of bedforms (or sandwaves) of a wide variety of spatial scales occur in rivers, estuaries, and coastal areas. Bed materials are found to organize into waves with distinct coarse fronts which are called bedload sheets. This paper deals with the formation of bedload sheets and pure sorting waves which induce spatial variations of the bottom roughness. Consequently, changes in the fluid motions exert a spatially varying stress on the bed. The authors make an interesting study of bedload transport of a sediment mixture composed of two size fractions – one in the sand range, and the other in the gravel range. This study includes the inherent instability of the fluid flow and sediment transport in a straight channel to infinitesimal bottom perturbations. A comparison between the theory and observations is made, and numerical studies of the problem are presented.
Reviewer: L.Debnath (Orlando)
Keywords:
spatial variations of bottom roughness; bedload transport of sediment mixture; varying stress; sand range; gravel range; instability; straight channel; infinitesimal bottom perturbationsReferences:
| [1] | Samaga, J. Hydraul. Engng ASCE 112 pp 1003– (1986) |
| [2] | Richards, J. Fluid Mech. 99 pp 597– (1980) |
| [3] | Jacobs, Z. Angew. Math. Mech. 19 pp 87– (1939) |
| [4] | Iseya, Geografiska Annaler 69 pp 15– (1987) |
| [5] | Hirano, Trans. JSCE 195 pp 55– (1971) |
| [6] | DOI: 10.1146/annurev.fl.14.010182.000305 · doi:10.1146/annurev.fl.14.010182.000305 |
| [7] | Egiazaroff, J. Hydraul. Div. ASCE 91 pp 225– (1965) |
| [8] | Ashida, Trans. JSCE 206 pp 59– (1972) |
| [9] | Antonia, J. Fluid Mech. 49 pp 737– (1972) |
| [10] | Antonia, J. Fluid Mech. 48 pp 721– (1971) |
| [11] | Proffit, J. Hydraul. Res. 21 pp 33– (1983) |
| [12] | Parker, Water Resources Res. 18 pp 1409– (1982) |
| [13] | Parker, J. Hydraul. Engng ASCE 117 pp 131– (1991) |
| [14] | Parker, J. Hydraul. Res. 20 pp 417– (1990) |
| [15] | Nezu, Proc. Hydraul. Engng JSCE 34 pp 505– (1990) · doi:10.2208/prohe.34.505 |
| [16] | Nakagawa, J. Hydraul. Div. ASCE 106 pp 2029– (1980) |
| [17] | Kuhnle, Water Resources Res. 24 pp 247– (1988) |
| [18] | Kennedy, J. Fluid Mech. 16 pp 521– (1963) |
| [19] | DOI: 10.1130/0091-7613(1988)016 2.3.CO;2 · doi:10.1130/0091-7613(1988)016 2.3.CO;2 |
| [20] | Tsujimoto, Proc. Hydraul. Engng JSCE 34 pp 433– (1990) · doi:10.2208/prohe.34.433 |
| [21] | Tsujimoto, J. Hydrosci. Hydr. Engng JSCE 7 pp 69– (1989) |
| [22] | Townsend, J. Fluid Mech. 22 pp 799– (1965) |
| [23] | Townsend, J. Fluid Mech. 11 pp 97– (1961) |
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.
