Question

What is the formula for the Flow Time for the unit area in hours?

(a) 168 – (total Bharai – total Jharai) / Total area to be irrigated by the water-course

(b) 168 + (total Bharai – total Jharai) / Total area to be irrigated by the water-course

(c) 168 – (total Bharai – total Jharai)

(d) 168 + (total Bharai – total Jharai)

The question was asked in an online interview.

The origin of the question is Canal Regulation topic in portion Canal Irrigation System of Irrigation Engineering

Answer 1

Right choice is (a) 168 – (total Bharai – total Jharai) / Total area to be irrigated by the water-course

Easy explanation: The distribution is done on the basis of seven-day rotation i.e. 24 x 7 = 168 hours.

The bharai time is debited from the common pool time of 168 hours and that value of bharai which is not efficient for field applications, the tail end farmer is compensated and allowed a certain recovery of the bharai time is called jharai.

Hence, the formula for Flow Time for a unit area of a land holding is given as –

FT = 168 – (total Bharai – total Jharai) / Total area to be irrigated by the water-course.