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 (m^{3}/s)

C = dimensionless coefficient of discharge

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

H = the total head on the crest (m)