Multiple choice

An outlet irrigates an area of 20 ha. The discharge (I/s) required at this outlet to meet the evapotranspiration requirement of 20 mm occurring uniformly in 20 days neglecting other field losses is

  1. 2.52

  2. 2.31

  3. 2.01

  4. 1.52
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total volume of water required = Area * depth = 20 ha * 20 mm = 200,000 m^2 * 0.02 m = 4,000 m^3. Discharge = Volume / Time = 4,000 m^3 / (20 * 24 * 3600 s) = 4,000 / 1,728,000 = 0.002314 m^3/s = 2.31 L/s.

Keep practicing — related questions