Question

What is the normal depth denoted as?

(a) Yo

(b) Yc

(c) Yb

(d) Yn

The question was posed to me in unit test.

Question is taken from Relation between Water Surface Slopes and Channel Bottom Slopes topic in division Non Uniform Flow in Channels of Fluid Mechanics

Answer 1

Correct answer is (d) Yn

To explain I would say: Normal depth is denoted as Yn. The normal depth plays an important role in determining the hydraulic slope and hydraulic curve of a fluid flow in motion. It is found using appropriate inlet and outlet conditions.