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Are weirs really needed?

Posted by hbean (My Page) on
Wed, Jun 13, 12 at 18:41

Hi

I'm in the process of building a pond less waterfall. I'm wondering if weirs are really necessary. I would like to create a natural effect with water "weeping" and pouring from a dry stack retaining wall. Ideally, I'd like to split the flow from the pipe behind the wall, and let the water emerge where it wants into a basin below the retaining wall. Of course, lining would be under everything to avoid water loss.

My plan is to split with a Y adapter or two and have water pumping directly out of tubes.

Curious to hear if anyone thinks this will create problems.


Follow-Up Postings:

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RE: Are weirs really needed?

Sounds good to me. The only issue I have thought of is that the large warm surface area would cause more evaporation than normal.


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RE: Are weirs really needed?

Shalom, been thinking about a similar setup with the waterwheel I'm working on installing - like the look of the water coming out from the rocks effect. I've had about an 16" water fall where I have the water from the hose going over the edge of various rock layers, most goes directly into the pond as a general stream, but with some dribbling over the rocks. I have never had a weir on the waterfall, just the hose over the rocks, sometimes I'd put a small flat stone in the water path to disperse the flow to add variety to the waterfall. I got quite a bit of moss growing on the sides of the stream (it's a northern exposure)and looks neat. Hopefully, i'll have the same concept with the water wheel, have to minimize splashing to keep evaporation under control as best as I can.


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RE: Are weirs really needed?

A weir is only needed when a clean wide, even, sheet of water is desired.


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RE: Are weirs really needed?

I think it is a great idea and one I have thought of myself as this is what is often seen in this area in the natural state. The water comes out of the rock walls in many areas and runs down.


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