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Unbalanced water pressure on walls

Unbalanced water pressure on walls

Unbalanced water pressure on walls

(OP)
For a swimming pool or water containing basin with an expansion joint, the water static pressure on one side of the basin is apparently not balanced. I wonder how to calculate the unbalanced pressure if a basin has an opening on a wall and the water falls down from the opening like a waterfall?

Thanks for comments in advance.

RE: Unbalanced water pressure on walls

I'm not sure I'm clear on what you're asking.  If there is water on one side of a wall and a different level of water on the other side of a wall, the pressure is caused by the difference in heights of water.  It varies by elevation starting at zero at the top.
If there is a hole in the wall, water will flow from the side with higher head to the side with lower head.  But that's a different problem.

RE: Unbalanced water pressure on walls

(OP)
Jed, the question is for a swimming pool-like basin with opening. No higher end, lower end. When the water is flowing out through the opening (not a hole, it is a segment of a wall), what would be the unbalanced water pressure? I don't know whether it is the same as the way to calculate the unbalanced static water pressure.

RE: Unbalanced water pressure on walls

I think you have a weir. You need to design for the worst case condition. Can the pool be empty on the downstream side ??

You need to clarify the problem!

RE: Unbalanced water pressure on walls

If the water is on both side of the walls, there must be a difference in head to make water flow through the hole.  this difference might be imperceptable, but it's there.  One-tenth of an inch of head difference would create a large flow through a large opening, but not necessarily impact the wall's design.  You might not even realize there is a head difference.
Basically, if there is a difference in water elevation between the two chambers, the wall must be designed for it.  But if it's very small, it may be ignored.

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