Question

Calculate the minimum modular head loss involved in ASOM if the head measured from the upstream water level in the distributary is 1.5 m and the width of the throat as 0.16 m.

(a) 1.50 m

(b) 1.15 m

(c) 1.07 m

(d) 1.00 m

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Question is from Regulation Modules topic in portion Regulation Modules and Canal Structure of Irrigation Engineering

Answer 1

Right answer is (b) 1.15 m

The explanation is: The minimum modular head loss involved in ASOM is given by the formula –

HL = 0.82 HS – W/2 where HS = Head measured from the U/s level in the distributary to the lowest point of the roof block and W = width of the throat

HL = (0.82 x 1.5) – 0.08 = 1.15 m.