Question

What is the correct representation for the calculation of NIR?

(a) Cu – Re

(b) CIR + leaching losses

(c) FIR + conveyance losses

(d) FIR + leaching losses + conveyance losses

I had been asked this question during a job interview.

I need to ask this question from Water Requirements of Crops in portion Water Requirements of Crops of Irrigation Engineering

Answer 1

The correct option is (b) CIR + leaching losses

For explanation I would say: Net irrigation requirement (NIR) can be defined as the amount of irrigation water required to be delivered at the field to meet the evapotranspiration and leaching losses.

NIR = (Cu – Re) + amount of water required for leaching = CIR + leaching losses requirement.