Question

The discharge passing over an Ogee spillway, per unit length of its apex line, is proportional to
1. H
2. H²
3. H^0.5
4. H^1.5
5. H^2.5

Answer 1

Correct Answer - Option 4 : H^1.5

Concept:

Dischage over an Ogee spillway is given by:

\(Q = \;\frac{2}{3}{C_d}\sqrt {2g} LH_e^{\frac{3}{2}}\)

He = Total head upstream of the crest.

L = crest width

Cd = coefficient of discharge

C = constant, which is equal to \(\frac{2}{3}{C_d}\sqrt {2g}\)