Allied & ICAR Exam Bank • ALLIED_1221 NAT • 1 Mark

Section 5: Irrigation and Drainage Engineering

Irrigation Efficiencies

Subtopic: Conveyance Efficiency

Question Statement:

An irrigation canal diverts $5.0\text{ m}^3/\text{s}$ at the canal headworks. The discharge measured at the field inlet after passing through the distributary network is $4.2\text{ m}^3/\text{s}$. The water conveyance efficiency $\eta_c$ (in %) is:

Answer Key:

84.0

Step-by-Step Solution & Explanation

$\eta_c = \frac{Q_{field}}{Q_{head}} \times 100 = \frac{4.2}{5.0} \times 100 = 84.0\%$.
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