Symbols - Sediment Transport in Irrigation Canals: A New Approach - page 229

Symbol Quantity Unit Dimension

(kg/m 3 ) FT 2 L − 4

ρ w Density of water

θ Shields parameter (-) -

θ dimensionless mobility parameter (-) -

θ cr Dimensionless critical mobility parameter (-) -

κ von Karman's constant; 0.4 (-) -

φ Dimensionless bed load sediment transport rate (-) -

φ Functional relationship among non-dimensional parameters (-) -

ψ Stratification correction (-) -

(m 2 /s) L 2 T − 1

ν Kinematic viscosity ν = µ / ρ

(m 2 /s) L 2 T − 1

ν t Effective viscosity

µ Absolute viscosity or dynamic viscosity (Pa · s)

π Ratio of circular circumference and diameter; π = 3 . 14159 (-) -

(N/m 2 FL − 2

τ Shear stress or Pa)

(N/m 2 FL − 2

τ Tractive force or Pa)

(N/m 2 ) FL − 2

τ bx Bottom shear stress

(N/m 2 ) FL − 2

τ cr Critical shear stress

τ cr (N/m 2 ) FL − 2

Critical shear stress for initiation of suspension

τ (N/m 2 ) FL − 2

Grain shear stress

(N/m 2 ) FL − 2

τ xy Effective shear stress

σ Standard deviation (-) -

Summation symbol (-) -