Question

The water distribution efficiency is 1.0 if _____________

(a) the deviation from the mean depth is 1

(b) the deviation from the mean depth is 0

(c) the deviation from the mean depth is less than 1

(d) the deviation from the mean depth is greater than 1

The question was posed to me during an interview.

I would like to ask this question from Water Requirements of Crops in chapter Water Requirements of Crops of Irrigation Engineering

Answer 1

The correct answer is (b) the deviation from the mean depth is 0

The explanation is: It represents the extent to which the water has penetrated to a uniform depth throughout the area. If the water penetrates uniformly throughout the field, the deviation from the mean depth is zero and hence, water distribution efficiency is 1.0.