Video 4 C2: What is a hydraulic jump?

Question 1

engineers need to be able to _____ how well structures will perform before construction

Answer 1

predict

Question 2

the depth of the subcritical flow is controlled by _____ conditions

Answer 2

downstream

Question 3

the depth of the supercritical flow is controlled by _____ conditions

Answer 3

upstream

Question 4

what happens when water transitions from supercritical to subcritical downstream?

Answer 4

a hydraulic jump

Question 5

what is a classic demonstration of a hydraulic jump? why is it not the best example?

Answer 5

at the bottom of your sink (circular hydraulic jump); not the best example because it happens due to surface tension not gravity (like a slope)

Question 6

a tidal bore occurs when an _____ tide forms a wave that travels ______ against a river

Answer 6

incoming; upstream

Question 7

what are hydraulic jumps most importantly used for?

Answer 7

energy dissipation (to control erosion risks) as heat

Question 8

how are hydraulic jumps used for recreation?

Answer 8

white water rafting