Sand Transport Studies with Radioactive Tracers

by D. W. Hubbell,
William W. Sayre,


Serial Information: Journal of the Hydraulics Division, 1964, Vol. 90, Issue 3, Pg. 39-68


Document Type: Journal Paper

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Abstract: Experimental results show that radioactive tracer techniques provide a feasible means for applying Lagrangian techniques to the observation of sediment transport processes in natural rivers and laboratory flumes. The transport of bed-material particles can be described as a sequence of alternating steps and rest periods of random length and duration. The assumption of exponentially and identically distributed incremental step lengths and rest periods leads to a longitudinal concentration-distribution function that agrees with experimental results obtained in the North Loup River, Nebr., and in a laboratory flume. Bed-material discharge can be computed from a continuity equation in which the velocity is defined by the rate of movement of the mean position of a group of tracer particles, and the area is defined as the average cross-sectional area of the bed through which the tracer particles are distributed.

Subject Headings: Probe instruments | Sediment transport | Particle velocity | Flumes | Bed materials | Particle size distribution | Lagrangian functions

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