Question

What is the value of abutment contraction coefficient for square abutment with headwall perpendicular to the direction of flow?

(a) 0.2

(b) 0.1

(c) 0.02

(d) 0.01

I had been asked this question in an online interview.

The question is from Ogee Profile topic in section Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

Answer 1

The correct answer is (a) 0.2

To elaborate: For square abutment with headwall at 90° to the direction of the flow, the abutment contraction coefficient is 0.2. For rounded abutment with headwall at 90° to the direction of flow, the value is taken as 0.1.