According to Kennedy’s theory, if the velocity of the flow is such that there is no silting or scouring action in the canal bed, then that velocity is known as_________?

Correct option is B

Kennedy's theory: -As per Kennedv's theorv. critical velocity (V) in a channel is the mean velocity
which is sufficient to prevent the channel from scouring and silting. Any velocity greater than critical
velocity causes scouring in the channel and any velocity less than critical velocity causes silting in the
channel.

Where m is the Critical Velocity ratio and D is the depth of flow
Further, the Critical Velocity ratio (CVR) is the ratio of actual velocity (Va) to critical velocity (Vc) in the
channel.
Now If.
CVR > 1, Va > Vc Scouring will occur.
CVR 1 ,Va < Vc Silting will occur
CVR 1, Va = Vc There will be no silting and scouring