Best Hydraulic Section For Trapezoidal Channels

P b 2y y b a 2 by 2 b 2 r r for rectangular section for trapezoidal section.

Best hydraulic section for trapezoidal channels. Z see figure above m in wetted perimeter. Section r for rectangular section. The best hydraulic section.

The horizontal bottom parabolic section hbp section is a composite section. It is known that the coneyance of achannel section increase with increase in the hydraulic radius or with decrease in the wetted perimeter. In most economic channel video your can find 1 condition of most economic channel section 2 rectangular section as a most economic channel section 3 hydrauli.

A z h 2 3 where. The construction cost can be reduced nearly to the minimum at the same time. Flow area of a triangular channel.

The best hydraulic channel section makes the maximum flow capacity for the same flow cross area and the minimum cross area and wetted perimeter for the same discharge. The geometric properties of the best hydraulic round bottom triangular section are of great interest. Hydraulic radius abbreviated as r h is the area cross section of water in a pipe or channel divided by the wetting perimeter.

R hydraulic radius of the flow cross section l. It is important for design to find the best combination form of the. Q discharge or flow rate l 3 t.

P is the contact length between the water and the channel bottom and sides. S slope of channel bottom or water surface l l. Rh by 2y b for an open channel flow through a rectangular cross section.