Question Bank • QB_IDE_EXP_018 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Irrigation Water Conveyance and Application Methods

Subtopic: Surface, sprinkler and micro irrigation methods

Question Statement:

A border strip of width $10\text{ m}$ and length $100\text{ m}$ receives an irrigation stream of $0.02\text{ m}^3\text{/s}$. The average infiltration rate of the soil is $0.03\text{ m/h}$. Using the maximum area relationship $A_{max} = \frac{Q}{I}$, the maximum area in $\text{m}^2$ that can be irrigated by this stream is ________ (round off to nearest integer).

Answer Key:

2400

Step-by-Step Solution & Explanation

1. Convert discharge $Q$ to $\text{m}^3\text{/h}$: $Q = 0.02\text{ m}^3\text{/s} \times 3600\text{ s/h} = 72\text{ m}^3\text{/h}$ 2. Maximum irrigable area $A_{max}$: $A_{max} = \frac{Q}{I} = \frac{72\text{ m}^3\text{/h}}{0.03\text{ m/h}} = 2400\text{ m}^2$
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