Deck 8: Varied Flow in Channels

Question 1

To calculate the drop in water surface as it enters a channel from a reservoir, use ___________________ equation.

Answer 1

Bernoulli's

Question 2

Backwater profiles involving subcritical flow are caused by a downstream condition or obstruction.

Answer 2

True

Question 3

Hydraulic jumps can occur wherever flow in a channel is very rapid.

Answer 3

True

Question 4

Which type of flow occurs when water flows from a large body such as a reservoir into a channel?

A)normal flow
C)laminar flow
B)varied flow
D)critical flow

Question 5

A(n) ___________________ section is a cross section of a channel at which the flow depth can be readily determined.

Question 6

Any abrupt transition from a lower-stage supercritical flow to a higher-stage subcritical flow is referred to as a(n) ___________________ jump.

Question 7

Generally, a more ____ hydraulic jump location is desirable.

A)upstream
C)elevated
B)downstream
D)gentle

Question 8

A backwater profile can be calculated directly by ____ of the energy equation.

A)the step methods
C)derivation
B)integration
D)multiplication

Question 9

Varied flow is considered ____________________ if it occurs over a relatively long distance.

Question 10

The standard step method is only used for nonprismatic channels.

Question 11

Critical depth varies with slope conditions.

Question 12

For subcritical flow, the control section is always at the ____ end of the channel reach.

A)upstream
C)near
B)downstream
D)far

Question 13

As water flows from a reservoir into a channel, if flow in the channel is supercritical, water enters the channel at critical depth.

Question 14

Which of the following is a slope resulting in subcritical flow?

A)mild slope
C)critical slope
B)steep slope
D)normal slope

Question 15

___________________ depth is determined by the value of normal depth in the channel downstream of the hydraulic jump.