Symbols - Sediment Transport in Irrigation Canals: A New Approach - page 226

LIST OF SYMBOLS

Symbol Quantity Unit Dimension

(m 2 ) L 2 A Area, cross section area

a Height of half roughness k /2 (m) L

B Channel bottom width (m) L

B o Channel width; bed width (m) L

B s Water surface width (m) L

B s Sediment transport width (m) L

B s Water surface width (m) L

(m 1/2 /s) L 1/2 T − 1 C de Chézy resistance coefficient

C (m 1/2 /s) L 1/2 T − 1 de Chézy coefficient due to skin resistance

C (m 1/2 /s) L 1/2 T − 1 de Chézy coefficient due to form resistance

c Sediment concentration (%, ppm by mass) -

C Sediment concentration (%, ppm by mass) -

c 0 Concentration at length x = 0 (%, ppm by mass) -

C 0 Total sediment concentration at x = 0 (%, ppm by mass) -

c a Reference concentration at level 'a' from the bottom (%, ppm by mass) -

c b Bed load concentration (%, ppm by mass) -

C c Contraction coefficient (-) -

C d Discharge coefficient (-) -

C D Drag coefficient (-) -

c e

Equilibrium concentration (%, ppm by mass) -

C e

Total equilibrium sediment concentration (%, ppm by mass) -

C e Effective Chézy coefficient (m 1/2 /s) L 1/2 T − 1

C e Modified effective Chézy coefficient (m 1/2 /s) L 1/2 T − 1

C f Friction coefficient, ( u ∗ / v ) 2 (-) -

c t or C t Total sediment concentration (%, ppm by mass) -

C v Velocity coefficient (-) -

d Particle diameter (m) L

D Diameter (m) L

d * Dimensionless particle diameter (-) -

D ∗ Dimensionless particle parameter (-) -

d 50 Median particle diameter (m) L

d i Diameter of i -percent finer than d i (m) L

d i Representative particle diameter (m) L

d r Discrepancy ratio (-) -

E Total energy (Nm/N) L

e Exponential number; e = 2.71828 (-) -

E Total energy in relation to a horizontal datum (J/N)

E s Specific energy in relation to lowest point of a cross-section (Nm/N) L

f Darcy-Weisbach resistance coefficient (-) -

f Friction factor (-) -

f Lacey's silt factor (-) -

F Shape factor (-) -

f (…) Function of (-) -

F g Grain Froude number (-) -

F g Weed factor (-) -

F gcr Critical grain Froude number (-) -

F gr

Dimensionless mobility parameter (-) -

( Continued )