Question

A rectangular channel of width 5 m carries water at 12 cumecs at a depth of 0.6m. The type of jump formed is :

• A. Weak jump
• B. Undular jump
• C. Oscillating jump
• D. Steady jump

Answer 1

The correct option is B Undular jump

Given:
B = 5 m, Q = 12 cumecs, Y = 0.6 m

$Forrectangularchannel,F_r=\frac{V}{\sqrt{gy}}$

$=\frac{Q}{By\sqrt{gy}}=\frac{12}{5\times 0.6\sqrt{9.81\times 0.6}}=1.65$

$1<F_r<1.7,thejumpisundularjump.$