Allied & ICAR Exam Bank • ALLIED_0881 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Open Channel Flow

Subtopic: Open Channel Flow

Question Statement:

A broad-crested weir of width $b = 3.0\text{ m}$ operates under head $H = 1.0\text{ m}$. Using theoretical formula $Q = 1.705 b H^{3/2}$, the discharge $Q$ in $\text{m}^3/\text{s}$ is (rounded off to two decimal places):

Answer Key:

5.12

Step-by-Step Solution & Explanation

$Q = 1.705 \times 3.0 \times (1.0)^{1.5} = 5.115\text{ m}^3/\text{s} \approx 5.12\text{ m}^3/\text{s}$.
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