Allied & ICAR Exam Bank • ALLIED_1195 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Open Channel Flow

Subtopic: Hydraulic Jump Energy Loss

Question Statement:

In a rectangular channel hydraulic jump, the initial and sequent flow depths are $y_1 = 0.3\text{ m}$ and $y_2 = 1.2\text{ m}$, respectively. The energy head loss in the hydraulic jump (in m) is:

Answer Key:

0.51

Step-by-Step Solution & Explanation

$E_L = \frac{(1.2 - 0.3)^3}{4 \times 0.3 \times 1.2} = \frac{(0.9)^3}{1.44} = \frac{0.729}{1.44} \approx 0.506\text{ m}$.
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