Table 4.9 (continued)

Notes:

(1) D is the representative grain size, ft, given in Table 4.7

(2) iB is the fraction of bed material, given in Table 4.7

(3) R′b is the bed hydraulic radius due to grain roughness, ft, given in Table 4.8

(4) Ψ′ is the intensity of shear on a particle = ((ρs - ρ)/ρ) (D/(R′bS))

(5) D/X for values of X, see Table 4.8, Column 18

(6) ξ = f (D65 / X) hiding factor, given in Figure 4.6

(7) Ψ* is the intensity of shear on individual grain size = ξY (β/βx)2 Ψ, values of Y and (β/βx)2 are given in Table 4.8

(8) ϕ * is the intensity of sediment transport for an individual grain

(9) iBqB is the bed load discharge per unit width for a size fraction, given in Equation 4.33

(10) iBQB is the bed load discharge for a size fraction for entire cross section, ton/day = 43.2WiBqB, W = Pb given in Table 4.8

(11) iBQB is the total bed load discharge for all size fractions for the entire cross section, tons/day

(12) E is the ratio of bed layer thickness to water depth = 2D/y. For values of y, see Table 4.8.

(13) Z is the exponent for concentration distribution = ω/(0.4 V′*) given in Equation 4.41. Values of ω and V* are given in Tables

4.7 and 4.8.

(14) I1 is an integral given by Equation 4.39 and read from Figure 4.9

(15) -I2 is an integral given by Equation 4.40 and read from Figure 4.10

(16) PEI1+I2+1 is the factor between bed load and total load given by Equation 4.31

(17) iTqT is the bed material load per unit width of stream for a size fraction lb/sec-ft = iBqB (PEI1+I2+1) given by Equation 4.31

(18) iTQT is the bed material load for a size fraction for entire cross section, tons/day = 43.2 WiTqT

(19) iTQT is the total bed material load for all size fractions, tons/day

4.49

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