Irrigation Water Conveyance and Application Methods
Subtopic: Design and evaluation of irrigation methods
Question Statement:
A sprinkler system consists of two 192 m long laterals. On each lateral, sixteen sprinklers are located at an interval of 12 m. The spacing between the laterals is 10 m. The required capacity (in litre s⁻¹) of sprinkler system for application rate of 1.0 cm h⁻¹ is
Options:
(A) 5.33
(B) 10.66
(C) 14.22
(D) 17.06
Official Answer Key:
B
Step-by-Step Solution & Explanation
Total number of sprinklers = 2 laterals × 16 = 32. Area served per sprinkler = sprinkler spacing × lateral spacing = 12×10 = 120 m². Total area = 32×120 = 3840 m². Application rate = 0.01 m/h. Required flow, Q = Area×rate = 3840×0.01 = 38.4 m³/h = 10.66 l/s.
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