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Irrigation Engineering

Irrigation Engineering
The Lacey's regime velocity is proportional to

R1/2 S3/4
Q3/4 S1/3
R2/3 S1/2
R3/4 S1/3

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Irrigation Engineering
For the design of major hydraulic structures on the canals, the method generally preferred to, is based on

Bligh's theory
Khosla's method of independent variables
Electrical analogy method
The relaxation method

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Irrigation Engineering
Vertical drop fall is satisfactory for a height upto

0.5 m
5.0 m
1.5 m
3.5 m

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Irrigation Engineering
The water utilizable by plants is available in soils mainly in the form of

capillary water
gravity water
hydroscopic water
chemical water

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Irrigation Engineering
If L is total length of a canal in kilometers, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is

PLC/1000
PL/1000C
PC/100L
100 PLC

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Irrigation Engineering
Groynes are generally built

Inclined downstream up to 30°
Perpendicular to the bank
All listed here
Inclined up stream up to 30°

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