Allied & ICAR Exam Bank • ALLIED_0497 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Crop Water Requirement

Subtopic: Crop Water Requirement

Question Statement:

The duty of irrigation water ($D$) in hectares/cumec and delta ($\Delta$) in meters for a base period $B$ in days are related by:

Options:

  • (A) $\Delta = \frac{8.64 B}{D}$
  • (B) $\Delta = \frac{8.64 D}{B}$
  • (C) $D = \frac{8.64 \Delta}{B}$
  • (D) $\Delta = 8.64 B D$

Answer Key:

A

Step-by-Step Solution & Explanation

Total volume supplied by $1\text{ m}^3/\text{s}$ over $B$ days is $86400 B\text{ m}^3$. Spread over $D\text{ ha} = 10^4 D\text{ m}^2$, depth $\Delta = \frac{86400 B}{10000 D} = \frac{8.64 B}{D}\text{ m}$.
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