The Transport of Gravels in Boulder-Bed Streams

by Alan F. Barta, Johns Hopkins Univ, Baltimore, United States,
Peter R. Wilcock, Johns Hopkins Univ, Baltimore, United States,
Conor C. C. Shea, Johns Hopkins Univ, Baltimore, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

In boulder-bed streams, gravel is typically found in isolated pockets protected by local flow obstructions. The deposition and entrainment of these gravels depend strongly on the local geometry of boulders and banks, which control the flow and transport fields in the stream. To investigate general features of sediment transport in boulder-bed streams, we observed flow and gravel entrainment from 70 gravel pockets in four boulder-bed streams. Once pocket geometry is accounted for, general relationships between flow discharge, gravel size and gravel transport may be developed.

Subject Headings: Gravels | Sediment transport | Rivers and streams | Fluid flow | Entrainment | Streamflow | Geometrics

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