Shape and Dimensions of Stationary Dunes in Rivers

by Jorgen Fredsoe, Assoc. Prof.; Inst. of Hydrodynamics and Hydraulic Engrg., Technical Univ. of Denmark, Lyngby, Denmark,

Serial Information: Journal of the Hydraulics Division, 1982, Vol. 108, Issue 8, Pg. 932-947

Document Type: Journal Paper


The shape and dimensions (length, height) of sand dunes in rivers are calculated by use of the measured bed shear stress distribution downstream a rearward-facing step. The transport of sediment is split up into bed load and suspended load, which makes it possible to explain the transition to plane bed. The model can predict flow-resistance curves in alluvial streams.

Subject Headings: Bed materials | Bed loads | Suspended loads | Dunes | Rivers and streams | Shear stress | Stress distribution | Sediment transport

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