Question

A hydraulic jump occurs at the top of a spillway. The depth before jump is 0.2m. The sequent depth is 3.2m. What is the energy dissipated in m (approximate)?

• A. 42
• B. 27
• C. 15
• D. 10.5

Answer 1

The correct option is D 10.5

The energy dissipation is given by

$E_L=\frac{{(y_2-y_1)}^3}{4y_1{y}_2}=\frac{{(3.2-0.2)}^3}{4\times 0.2\times 3.2}$

= 10.55 m