Deck 9: Culvert Hydraulics

Question 1

____________________ control occurs when it is harder for the stream flow to negotiate the length of the culvert than it is to get through the entrance in the first place

Answer 1

Outlet

Question 2

Because of the continuity equation, the slow-moving water upstream of a culvert has an increased depth, and the faster water in the culvert is shallower.

Answer 2

True

Question 3

If constriction occurs more at the entrance than the outlet, the culvert is said to be operating under ____.

A)outlet control
C)slope control
B)inlet control
D)velocity control

Answer 3

B

Question 4

To compute the headwater depth for a culvert operating under inlet control, only the flow rate Q and the entrance size and shape must be taken into consideration.

Question 5

An entrance efficiency problem can be solved by changing the ___________________ of the culvert entrance.

Question 6

When flow in a stream (or channel) encounters a culvert, it experiences a(n) ____________________ that causes a change in flow depth.

Question 7

Which type of flow occurs when the tailwater is above the culvert crown and tailwater is relatively high?

A)Type A
C)Type C
B)Type B
D)Type D

Question 8

Critical factors in inlet control are cross-sectional area of the inlet and inlet _____________________.

Question 9

The proper method used to determine headwater depth for any culvert problem is to guess the type of control.

Question 10

Which type of flow occurs when headwater depth rises above the inlet crown, tailwater depth is relatively low, and the culvert barrel is relatively short.

A)Type A
C)Type C
B)Type B
D)Type D

Question 11

Length of the culvert is a factor that affects flow through a culvert.

Question 12

Which of the following is of primary concern in culvert analysis?

A)upstream depth
C)flow pattern
B)downstream depth
D)slope

Question 13

Tailwater depth depends in general on ____.

A)the size of the culvert opening
C)slope
B)culvert entrance geometry
D)characteristics of the stream

Question 14

Downstream depth is also called ____________________ depth.

Question 15

Upstream (headwater) depth is determined by the stream.