Question

The pre-jump Froude Number for a particular flow in a horizontal rectangular channel is 10. The ratio of sequent depths (i.e., post-jump depth to pre-jump depth) is

• A. 13.65
• B. 15.56
• C. 8.56
• D. 20.75

Answer 1

The correct option is A 13.65

$\frac{y_2}{y_1}=\frac{1}{2}[-1+\sqrt{1+8F_1^2}]$

$=\frac{1}{2}[-1+\sqrt{1+8\times 100}]$

$\frac{y_2}{y_1}=13.65$