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Irrigation Engineering

Irrigation Engineering
The relation between probability (P) and recurrence interval (T) is given by

P/T = 1
PT = 1
P/T2 = 1
PT2 = 1

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Irrigation Engineering
If d1 is the depth of cutting, d2 is the height of the bank from bed level r2 : 1 and r1 : 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is

x = r1 d1
x = r2 d2
x = d2 / r2
x = d1 / r1

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Irrigation Engineering
Finally formed berms in canals are provided for

Strengthening of banks
All of these
Control of seepage losses
Protection of banks erosion by the waves

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Irrigation Engineering
For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of

rabi and sugarcane or kharif and sugarcane
rabi or kharif or sugarcane
rabi or kharif
rabi and kharif or sugarcane

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Irrigation Engineering
When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. doesnot touch the underside of the supporting structure, the structure so provided, is called

Syphon
Syphon-aqueduct
Super passage
Aqueduct

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Irrigation Engineering
In case of a trapezoidal notch fall

All listed here
Splay downstream from the notch section is 22½°
Top length of the piers should not be less than their thickness
Splay upstream from the notch section is 45°

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