FLOOD03477

• County: Statewide
• Community: Statewide
• Stream Name: All
• Basin: Statewide
• Title: Velocity Profile, Water-Surface Slope, Bed-Material Size for Selected Streams in Colorado
• Date: 1/1/1984
• Prepared For: CWCB
• Prepared By: USGS
• Floodplain - Doc Type: Educational/Technical/Reference Information

Table 3.--Summarg of intermediate diameter (b-axis) bed material
'Statistical size distribution, in feet, Particles Particles Average
Site shown for the following percentiles verti- horizon- Krumbein
num- cally tally round-
ber 16 25 50 75 84 90 95 oriented oriented ness3
(percent) (percent)
1 0.04 0.08 0.20 0.49 0.74 1.05 1.45 3 34 0.4
2 .07 .15 .35 .64 .81 1.00 1.35 5 62 .5
3 .08 .15 .29 .50 .67 .85 1.10 8 62 .4
41 .001 .002 .18 .98 1.90 2.80 3.80 2 52 .4
52 .001 .002 .003 .019 .04 .06 .08
6 .19 .24 .35 .44 .51 .61 .80 7 61 .5
7 .30 .42 .81 1.25 1.53 1. 78 2.15 6 61 .4
8 .05 .10 .19 .33 .49 .68 .94 5 72 .4
9 .18 .26 .52 .94 1.25 1.60 2.05 14 54 .4
10 .14 .20 .36 .54 .64 .75 .92 6 57 .5
11 .17 .25 .40 .60 .76 .96 1.25 11 58 .4
1Combined Wolman method and sieve analysis (Wolman, 1954) .
2Sieve analysis only.
3Krumbein, 1941.

Table 4.--Sumrnarg of long diameter (a-axis) bed material
Statistical size distribution, in feet, Particles Particles
Site for the following percentiles vertically horizontally
number oriented oriented
16 25 50 75 84 90 95 (percent) (percent)
--~--- ----- -------
1 0.09 0.27 0.66 0.96 1.35 2.:W 4 --03 -------- -
2 0.07 .18 .50 .93 1. 18 1.45 1.95 2 33
3 .09 .21 .47 .78 1.00 1. 25 1.55 1 43
41 .001 .002 .20 2.40 3.70 4.35 5.20 5 46
52
6 .27 .34 .49 .64 .74 .87 1.10 1 34
7 .56 .74 1.30 1.85 2.15 2.50 3.00 3 35
8 .05 .12 .29 .45 .61 .87 1.35 2 26
9 .27 .39 .81 1.35 1. 75 2.10 2.55 6 40
10 .22 .30 .52 .79 .96 1.15 1.35 0 43
11 .24 .33 .58 .90 1.13 1.35 1.60 0 36
1Combined Wolman method and sieve analysis (Wolman, 1954) .
2Sieve analysis only.

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