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

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Irrigation Engineering
The intensity of irrigation means

Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
Percentage of culturable commanded area to be irrigated annually
Percentage of gross commanded area to be irrigated annually
Total depth of water supplied by the number of waterings

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Irrigation Engineering
A divide wall is provided

Parallel to the axis of weir and upstream of it
At an inclination to the axis of weir
Parallel to the axis of weir and downstream of it
At right angle to the axis of weir

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