Video 1 C2: Intro to open channel flow

Question 1

the depth of the water of the weir is called…

Answer 1

the critical depth

Question 2

___ depth is constant for a given flow rate and weir geometry

Answer 2

critical

Question 3

the water before the weir is deep and slow, aka ____ flow.

Answer 3

subcritical

think: submarines go deep in the ocean at a slow pace

Question 4

what happens at the edge of the weir?

Answer 4

the water spills over, and falls rapidly to the channel below

Question 5

the flow that is downstream of weirs, that moves rapidly and shallow, is called _____ flow

Answer 5

super critical

think: usain bolt is super fast and lean (shallow)

Question 6

if the depth and flow conditions downstream are correct, then the flow can be forced to return to a slower/deeper ______ regime

Answer 6

subcritical

Question 7

what is a hydraulic jump?

Answer 7

a standing wave qualified by quite violent eddies and white water

Question 8

in the picture showing the water, which part is which flow?

Answer 8

top (browner) section is the supercritical flow and the bottom (whiter) section is the hydraulic jump