Question
Download Solution PDFAccording 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 ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation
Kennedy’s theory:
As per Kennedy’s theory, critical velocity (Vc) 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.
Vc = 0.55 m D0.64
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.
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