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A field calibration of the sediment-trapping characteristics of the Helley-Smith bedload sampler

1979; United States Department of the Interior; Linguagem: Inglês

10.3133/ofr79411

2332-4899

William W. Emmett,

Underwater Acoustics Research

1. Sketch of the Helley-Smith bedload sampler 2. Plan and side-elevation drawings of 7.62-cm Helley-Smith bedload sampler 3. Graph showing vertical-velocity profiles upstream of sampler, and in sampler orifice of 7.62-cm Helley-Smith bedload sampler 4. Map of East Fork River drainage area upstream of the project site 5. Planimetric map of East Fork River in vicinity of bedload trap, showing median diameter of bed material at sections along river 6. Cross section of the East Fork River at the bedload trap 7. Photographs of the East Fork River and conveyor-belt bedload sampler 11,12 8. Graph of hydraulic-geometry relations for the East Fork River at the bedload trap 9. Photographs showing use of the Helley-Smith sampler at the bedload trap 10-18.Graphs showing relation of bedload-transport rate in individual-size category as function of total bedload-transport rate: 10. (A) Helley-Smith sampler: 0.06 11. (A) Helley-Smith sampler: 0.12 12. (A) Helley-Smith sampler: 0.25 13. (A) Helley-Smith sampler: 0.50 14. (A) Helley-Smith sampler: 1.00 15. (A) Helley-Smith sampler: 2.00 16. (A) Helley-Smith sampler: 4.00 17. (A) Helley-Smith sampler: 8.00 18. (A) Helley-Smith sampler: 16.0 sampler and (B) conveyor-belt -0.12 mm size class sampler and (B) conveyor-belt -0.25 mm size class sampler and (B) conveyor-belt -0.50 mm size class sampler and (B) conveyor-belt -1.00 mm size class sampler and (B) conveyor-belt -2.00 mm size class sampler and (B) conveyor-belt -4.00 mm size class sampler and (B) conveyor-belt -8.00 mm size class sampler and (B) conveyor-belt -16.0 mm size class sampler and (B) conveyor-belt -32.0 mm size class 19-27.Graphs showing comparison of bedload-transport rate by individual particle-size category, Helley-Smith sampler and conveyor-belt sampler: 19.0.06 -0.12 mm 20.0.12 -0.25 mm 21. 0.25 -0.50 mm 22. 0.50 -1.00 mm 23.1.00 -2.00 mm size class size class size class size class size class