So, I wouldn't worry about it too much.
If you have cattle panels, just make it round, as it is easier to put together (no posts or ropes).
Doug Gillespie wrote:Yup, cattle panels do bend nicely into (big) circles. I was thinking, vis-a-vis the pond liner, that in a typical pond situation the liner is either under water or (at the edges) covered with stone or other landscaping. The roof should eliminate any concern, though.
the water won't protect it from UV, unless it is really deep. A simple dome roof like from a grain silo or maybe an old satellite dish would work.
I remember reading someone asking, either here at permies or at your site, if you could do this as a round tank. I was researching gabions and found this site: http://www.ceshepherd.com/quick_water_tank.html. I thought you and the other readers might be interested in the design. I am looking for pricing on the spiral binders that appear to be required to connect the welded wire panels or rolls together securely. Hog rings won't do.
Then, make a retaining ring at the top, bottom, and 1/3 the height. The retaining ring could be as simple are steel strapping or rebar. It should go on the outside of the mesh.
William Bronson wrote: Hey Abe, how is the tank holding up? I cant see myself making one that big, but a smaller, round tank would be great.
The tank is holding up great and is full of water. We put a greenhouse plastic roof on it, but I'm looking for a better solution, maybe a floating green roof.
We have made both potable and nonpotable round tanks that work really well: http://velacreations.com/water/water-storage/313-cistern-howto.html
The round tanks are easier to construct, so that's what we do, now. If you can buy a replacement pool liner or get a cheap above ground pool on Craigslist, then you can make a nonpotable tank very cheap and easy.
You seem to innovate in everything you do, what fun!
We as a family just bought an urban lot to shape to our own liking and I have found your examples to be inspiring.
I think we will stick with 250 gallon totes for now, as they are cheap, and intend to in incorporate them into the structure of a shed.
Btw, I happen to have a large collection of new and used blue tarps. I know they will die pretty quickly when exposed, do you have any idea how they weather when submerged and of underground?