Question

A steady discharge of 1 cumec flows uniformly in a rectangular channel 1 m wide at a depth of 250 mm. The slope of the channel bed is

• A. steep
• B. adverse
• C. mild
• D. critical

Answer 1

The correct option is A steep

$y_c={\left(\frac{q^2}{g}\right)}^{1/3}={\left(\frac{1^2}{9.81}\right)}^{1/3}$

$=0.467m$

$y_n=0.25m$

$\Rightarrow y_c>y_n$

$\Rightarrow s_c<s_0\Rightarrow steep\&slope$