Journal ArticleDOI
Bar Resistance of Gravel-Bed Streams
Gary Parker,Allan W. Peterson +1 more
TLDR
In this article, the authors quantified bar resistance empirically using data from rivers in Alberta, Canada, and used the device of slope division of reach-averaged bed stress.Abstract:
Gravel-bed streams with bankfull channels of low sinuosity are considered. At flood stages, most of the resistance is grain resistance. Thus, depth-discharge relations can be predicted with existing method, although the inherent scatter is large. At lower stages, however, from resistance due to the presence of bars becomes increasingly important. Bar resistance is quantified empirically using data from rivers in Alberta, Canada, and the device of slope division of reach-averaged bed stress. Further reduction leads to predictive design graphs for depth-discharge relations. A numerical example is provided.read more
Citations
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Journal ArticleDOI
A systematic analysis of eight decades of incipient motion studies, with special reference to gravel-bedded rivers
TL;DR: In this article, the authors used data compiled from eight decades of incipient motion studies to calculate dimensionless critical shear stress values of the median grain size, t* c 50.
Journal ArticleDOI
Surface-based bedload transport relation for gravel rivers
TL;DR: In this paper, an empirical substrate-based bedload relation for gravel mixtures, developed solely with reference to field data, is transformed into a surface-based relation, based on the availability of each size range in the surface layer.
Journal ArticleDOI
On why gravel bed streams are paved
Gary Parker,Peter C. Klingeman +1 more
TL;DR: In this paper, the authors investigated the effect of road pavement in poorly sorted gravel bed streams downstream of dams and found that the coarse half of the subpavement moves through a reach at a rate near that of the fine half.
Journal ArticleDOI
Is the critical Shields stress for incipient sediment motion dependent on channel‐bed slope?
TL;DR: In this paper, a force-balance model was used to investigate the relationship between the critical Shields stress and the relative roughness of the sediment in laboratory flumes and natural streams.
Journal ArticleDOI
Physical basis for quasi-universal relations describing bankfull hydraulic geometry of single-thread gravel bed rivers
TL;DR: In this article, the authors examined relations for hydraulic geometry of alluvial, single-thread gravel bed rivers with definable bankfull geometries and showed that these relations show a considerable degree of universality.