Effects of Particle Shape on Bedload Transport

by M. Moore, Virginia Polytechnic Inst and State, Univ, Blacksburg, United States,
P. Diplas, (M.ASCE), Virginia Polytechnic Inst and State, Univ, Blacksburg, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The effects of particle shape on bedload transport in gravel-bed streams are examined using a similarity approach and fractional transport analysis for data from Piceance Creek, Colorado, which contains flat, low density, shale particles. The reference transport critical shear stress for the median surface grain size, ?_r50s, for the flat shale particles in Piceance Creek is approximately 2.5 times higher than those for more spherical particles. This indicates a lower susceptibility of disc-like particles to initial entrainment and lower transport rates for given flow conditions than more rounded particles.

Subject Headings: Sediment transport | Particle size distribution | Shear stress | Particles | Rivers and streams | Transport rates | Bed loads | Colorado | United States

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