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SETTLING TANK (by Mosonyi)

a d

Intake discharge Q = 25 m3/s 0.36 >1 mm

0.44 0.1-1 mm

Specific gravity of particles = 2.65 0.51

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t = 568.64385 s

Length of tank = 111.8943 m

say 112 m

L/B = 4.7058824 (should be more than 4, preferable 8-10)

Cross Section for Hopper

5.5 m

2.4 m

0.8 m 45

0.65 m

0.5 m

4 m/s

0.3125 m2

Assume width of duct = 0.5 m

Depth of duct = 0.625 m

say 0.65 m

w0 X L = 2.052449 w0 X (D)^1/6 = 2.538687

U X D n X U X g

trap efficiency = 100 %

rugosity n = 0.018 (from Camp's sediment removal function)

Assume flow velocity =

Area reqd for SFD =

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(by RS Varshney for Himalayan rivers)a d

0.55 >1 mm

0.66 0.1-1 mm

0.77

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article size, i.e. d)