Irrigation Engineering
For designing the venturi head,

Length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal
Width of the throat should not be less than one-third of the bed width of main canal
All listed here
Minimum throat width should not be less than 60 cm

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Irrigation Engineering
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.Reason R : Rainfall gradient is steep.Select your correct answer according to the coding system given below :

A is true but R is false
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is false but R is true

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