Question

If L is effective length of spillway crest and H is the total head over the spillway crest including velocity head, the discharge passing over an Ogee spillway is given by
1. CLH^3/2
2. CHL^3/2
3. CLH^5/2
4. CLH^1/2

Answer 1

Correct Answer - Option 1 : CLH^3/2

Explanation:

Similar to the crest profile, the discharge characteristics of the standard spillway can also be derived from the characteristics of the sharp-crested weir. 

The weir equation for the discharge passing over a spillway is given by:

\(Q = C\sqrt {2g} LH^{3/2}\)

where,

Q = flow rate (m³/s)

C = dimensionless coefficient of discharge

L = The effective crest length perpendicular to the flow (m)

H = the total head on the crest (m)