# BED WIDTH AND DEPTH RELATIONSHIP

• Kennedy’s theory does not give any importance to B/D ratio.
• The very large number of sections with varying B/D ratio and all satisfying the C.V.R. are possible by this theory.
• But all these sections cannot be equally satisfactory.
• This drawback of Kennedy’s theory was made good to some extent by Mr.
• Woods, who gave B/D ratio table for various discharges.
• In Uttar Pradesh (U.P.) bed width, and depth are related by following equation.

(i) For discharge of the channel up to 15 cumec

$D= \frac{1}{2}\sqrt{B}$

(ii) For discharge of 15 cumecs and above depths for various discharges should be as follows.