FLOOD01191

• County: Statewide
• Title: Laboratory Data on Course-Sediment Transport for Bedload-Sampler Calibrations
• Date: 1/1/1987
• Prepared By: USGS
• Floodplain - Doc Type: Educational/Technical/Reference Information

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EXPLANATION

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- - - - - Run 3, 2.1-mm bed material
- - - - - - - Run 3, 6.5-mm bed material
Run " 19.9-mm bed material

0.0
0.0 0.5 1.0

1.5 2.0 2.5 3.0 3.5 4.0 4.5

TRANSPORT RATE. IN POUNDS PER SECOND PER FOOT

Figure 11. Cumulalive relalive-frequency distribution of
bedload-transport rates from samples collected wilh Helley-
Smith sampler no. 1.

The 6.5-mm material consisted of particles from a
roofing-gravel mixture that had passed through an 8.0-mm,
square.mesh screen. The 2.I-mm material was derived from
No. 10 washed filter rock and was composed of particles
that were retained by a 1.5-mm, square. mesh screen but
which passed through a 2.5- by 6.4-mm, rectangular-mesh
screen. Particles from a coarse gravel mixture that were
retained by a 12.7-mm, square-mesh screen, but which

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EXPLANATION

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- - - - - Run 3 2 l-mm bed material
- - - - - - - Run 3: 6:5-mm bed material
Run 1, 19.9-mm bed material

0.0
0.0

1.5

2.0

2.5

05

1.0

TRANSPORT RATE. IN POUNDS PER SECOND PER FOOT

Figure 12. Cumulative relative-frequency distribution of
bedload-transport rates from samples collected with Helley-
Smith sampler no. 2.

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EXPLANATION

- - - - - Run 3, 2.1-mm bed material
- - - - - - - Run 3, 6.5-mm bed material
Aun " 19.9-mm bed material

0.0
0.0

1.0

2.0

'.0

4.0

TRANSPORT RATE. IN POUNDS PER SECOND PER FOOT

Figure 13. Cumulative relative-frequency distribution of
bedload-Iran sport rales from samples collecled with Helley-
Smilh sampler no. 3.

passed through a 32.0-mm, square-mesh screen, com-
posed the 23.5-mm bed material. The bed-material mixture
was produced by combining particles removed from the
flume after the sixth run with 6.5-mm material and after the
fifth run with 23.5.mm material, together with 2.I.mm
material that had been prepared but never used; the propor-
tions of the mix, by volume, were 11, 3, and 4, respec-
tively.

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EXPLANATION

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- Run 3. 2.1-mm bed material
_ _ - - - - - Run 3. 6.5-mm bed material
Run " 19.9-mm bed material

0.0
0.0

'.0

40

5.0

'.0

2.0

TRANSPORT RATE, IN POUNDS PER SECOND PER FOOT

Figure 14. Cumulalive relalive-frequency dislribulion of
bedload-transport rates from samples collected with Helley-
Smith sampler no. 4.

Hydraulic and Sedimentologic Data 11