Table 20. Toffaleti Transport Function
____________________________________________________________________
Parameter
River Data
Flume Data
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Median Particle Size Range, mm
0.095 - 0.76
0.91 - 0.45
Total Particle Size Range, mm
0.062 - 4
0.062 - 4
Multiple Size Classes
yes
yes
Velocity, fps
0.7 - 7.8
0.7 - 6.3
Hydraulic Radius, ft
0.7 - 56.7
0.07 - 1.1
Slope, ft per ft
0.000002 - 0.0011
0.00014 - 0.019
Width, ft
63 - 3640
0.8 - 8
Water Temperature, Deg F
32 - 93
40 - 93
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Table 21. Van Rijn Transport Function
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Parameter
Sand Data
Gravel Data
____________________________________________________________________
Particle Size Range, mm
Multiple Size Classes
Velocity, fps
Depth, ft
DATA NOT AVAILABLE YET
Slope, ft per ft
Width, ft
Water Temperature, Deg F
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Table 22. Yang Transport Function
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Parameter
Sand Data
Gravel Data
____________________________________________________________________
Particle Size Range, mm
0.15 - 1.7
2.5 - 7.0
Multiple Size Classes
no
no
Velocity, fps
0.8 - 6.4
1.4 - 5.1
Depth, ft
0.04 - 50
0.08 - 0.72
Slope, ft per ft
0.000043 - 0.028
0.0012 - 0.029
Width, ft
0.44 - 1750
0.7 - 1.3
Water Temperature, Deg F
32 - 94
not reported
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Correction for Sand Transport in High Concentration
of Fines
Colby (1964) showed a significant increase in the transport capacity of sands
when high concentrations (Cf > 10,000 ppm) of fine sediments (wash load) were
present. The correction factor ranged up to 100 times the normal transport as the
water depth and fines-concentration increased. The range of parameters tested is
given in the following table.
Parameter
Range of data
concentrations
up to 200,000 ppm
velocities
up to 10 fps
depths
up to 100 ft
grain sizes
up to 0.9 mm.
55
Chapter 3
Theoretical Basis for SAM.sed Calculations
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