Posted 02-18-2001 at 12:11:39
[Reply] [No Email]
I am currently digging a 50ft pond about 5ft deep. Work is stalled for now because the groundwater table is too high, about 2ft below the surface. This won't last long in Central Texas, but it will be a problem every winter. I have drained the water with a water pump and it currently refills at about 5000 gallons per day back to the 2ft below ground level.
I am going to use a liner with this pond. I know I need a French drain under the liner, but have a question for any experienced pond builders or hydraulics experts.
What if I dig a trench across the bottom of the pond and part way up one side, fill it with gravel, and put a 4in pvc drain pipe out the side at about the 2ft depth level below top water line. Won't the weight of the water pushing down on the liner push the water up the trench and into the drain pipe? The drain will still be significantly below the top water level of the pond, but avoids the need to dig a 5ft deep trench from the pond all the way to the creek where I will dump excess (and fill when I need to).
I will dig a trench the 100ft from pond to creek, but really don't want to have it 5ft deep. Can I avoid it? Will the groundwater float the liner?
Posted 02-19-2001 at 07:17:38
[Reply] [Send Email]
First use a permalon liner they are easier to use and are self supporting versus epdm
Will the water float the liner...probably not.
Water seeks the path of least resistance...so if you give it some outlet it will go in that direction
Why dont you put the pipe straight up in the middle of the pond?? Sort of like a fountain...maybe build a oil derrick it is texas after all.
then in winter you would have gushers!!