Open channel flow

Question 1

What is open channel flow?

Answer 1

Open-channel flow indicates flow in a channel open to the atmosphere: it can be
natural or man made channels or conduits where the liquid does not fill the conduit
completely, and thus there is a free surface

Question 2

Flow depth?

Answer 2

flow depth, h, at a section is the perpendicular distance measured from the lowest
point of the channel bed to the free surface

Question 3

Flow area?

Answer 3

flow area, A, is the cross section of the flow perpendicular to the flow direction

Question 4

Wetted parameter?

Answer 4

wetted perimeter, P, is the length of the solid channel cross section
surface in contact with the liquid

Question 5

Hydrualic radius?

Answer 5

hydraulic radius, R, area over wetted perimeter R=A/P

Question 6

Uniform flow for open channels

Answer 6

the flow depth remains constant with distance
along the channel