Head Within Pipe System

martin888888 · Jul 29, 2015

I have a question on how to determine head within a pipe system. I am not an expert pressure pipe system analyst. We have a sedimentation pond with an 6" HDPE pipe line draining water from it. The outlet of our pipe is at 505 at the pond and the pipe will be layed on the ground, downhill to an elevation of 480. At 480 it needs to go up and over a 5' berm. What is the best way to determine if the head pressure in the pipe will push the water up and over the berm?

beej67 · Jul 29, 2015

Pull out your intro to fluids textbook and flip to the energy equation chapter. What you describe is a pretty basic homework problem.

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jgailla · Jul 30, 2015

The pressure in the pipe will necessarily cause the water to flow from a higher to a lower elevation.
The only question is at what rate.

martin888888 · Jul 30, 2015

Gravity will cause it to fall from a higher to lower elevation but when you have sort of an inverted siphon, what head losses need to be overcome and what elevation change do you need.

BUGGAR · Jul 30, 2015

As long as your inlet is the highest point in the system, you will get flow*. Friction can reduce that flow but never stop it.

*inverted siphons not considered here.

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Head Within Pipe System

martin888888

Civil/Environmental

beej67

Civil/Environmental

jgailla

Geotechnical

martin888888

Civil/Environmental

BUGGAR

Structural

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