Ok, I'm not expecting to get much help with this but I thought maybe their might be an water hydraulics person out here.
I'm working on the waterfall weir for my new pond. The waterfall opening is abotu 21" inches across. The distance between the upper pond and the lower pond that the waterfall traverses is 12". On this 12" ledge I am going to place a piece of flagstone and extend it out past the wall about 1-2". The water will flow over the flagstone and than of course fall into the lower pond.
It was suggested to me that rather than just laying the flagstone down flat, I should slope the flagstone a bit. This will help the water to flow down the flagstone faster and kind of shoot off the edge of the flagstone rather than just flow off. It should help prevent water from wrapping around under the bottom of the flagstone and dribbling down the front of the wall.
The pic below is NOT my pond but a picture of the type of waterfall and issue I'm talking about. You can see how wet the block area is behind and to the sides of the waterfall. While some of this is from splashing, a lot of it is from dripping off the weir.
I think if I have 1/4" drop across the 12" of flagstone that should be enough. Too much of a drop and I think the flagstone/waterfall will look weird.
Craig
I'm working on the waterfall weir for my new pond. The waterfall opening is abotu 21" inches across. The distance between the upper pond and the lower pond that the waterfall traverses is 12". On this 12" ledge I am going to place a piece of flagstone and extend it out past the wall about 1-2". The water will flow over the flagstone and than of course fall into the lower pond.
It was suggested to me that rather than just laying the flagstone down flat, I should slope the flagstone a bit. This will help the water to flow down the flagstone faster and kind of shoot off the edge of the flagstone rather than just flow off. It should help prevent water from wrapping around under the bottom of the flagstone and dribbling down the front of the wall.
The pic below is NOT my pond but a picture of the type of waterfall and issue I'm talking about. You can see how wet the block area is behind and to the sides of the waterfall. While some of this is from splashing, a lot of it is from dripping off the weir.
I think if I have 1/4" drop across the 12" of flagstone that should be enough. Too much of a drop and I think the flagstone/waterfall will look weird.
Craig