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Role of near-bed turbulence in bedload transport

January 1, 1995

Bedload transport by a turbulent fluid moving over an erodible sediment bed results from complex interactions between flow field of the overlying fluid and the grains making up the bed. To develop a better view of these interactions, a method that combines high-speed photography with laser-Doppler velocimetry was devised. The methodology permits correlation of bedload transport with local turbulence structure at a frequency resolution of 10 hz. By making a suite of measurements at varying distances from a backward step, data were obtained for a variety of flows with different turbulence characteristics ranging from steady, uniform boundary layers to highly intermittent, nonuniform wake-like flows.

Publication Year 1995
Title Role of near-bed turbulence in bedload transport
Authors Jonathan M. Nelson, Ronald L. Shreve, Stephen R. McLean
Publication Type Conference Paper
Publication Subtype Conference Paper
Index ID 70018825
Record Source USGS Publications Warehouse