Laboratory Study of Transport of Fine Sand

by Joe C. Willis, Res. Hydr. Engr.; USDA Sedimentation Lab., Oxford, MS,
Neil L. Coleman, Geologist; USDA Sedimentation Lab., Oxford, MS,
Wilbert M. Ellis, Hydr. Engrg. Technician; USDA Sedimentation Lab., Oxford, MS,

Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 3, Pg. 489-501

Document Type: Journal Paper


Laboratory tests were conducted to define the relationships between the transport of fine sand and the flow variables. Data from 105 experiments with sand bed material having a median sieve diameter of 0.1 mm in a 100-ft (30.48 m)-long by 4-ft (1.22 m)-wide recirculating flume show that the concentration of the transported material depends in a rather complex, but consistent way on the basic flow variables. A graphical relationship between the concentration and the flow discharge per unit of channel width defines consistent curves of equal depth and readily delineates the various bed form regimes. A similitude analysis of published transport data for coarser sands suggests a single curve for concentration versus Froude number for each median sediment size. However, the data for the 0.1-mm material suggest separate curves of concentration versus Froude number for the different bed form regimes. The data for depths less than or equal to 0.7 ft (0.21 m) define a continuous relationship like that for coarser sands, but the data for deeper depths define an extended plane bed curve segment that has not been observed for coarser material.

Subject Headings: Bed materials | Laboratory tests | Sand (hydraulic) | Coarse-grained soils | Sand (material) | Soil analysis | Sandy soils | Sediment transport

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