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Pond survey camera suggestions?

Started Jul 18, 2020 | Discussions thread
ProfHankD
OP ProfHankD Veteran Member • Posts: 9,147
Re: Pond survey camera suggestions?

kelpdiver wrote:

SirHarry wrote:

Well, if the water level doesn't drop anymore I can tell you where exactly the leak is:

Its exactly on the water level

not quite so simple.

Water level delta = water pouring in via waterfall - water lost to evaporation - water lost to leak.

Water lost to leak may be based on water pressure (depth), as well as water saturation underneath. Evaporation will vary on sunlight and humidity. Water intake varies on upstream supply. And if the drop took place over years, it's pretty subtle on day to day basis.

It holds steady for fairly long times, but also changes level as much as +/- a foot in a day. Really not consistent at all. I'm assuming that means there's probably a big hole in the liner somewhere and the clay below it is sort-of holding, but not consistently. The piece of liner I found washed on the shore is about 1'x2', which would certainly be enough to explain this....

BTW, I did say we're in a sinkhole area, right? It's quite possible it has a little sinkhole under it now... in which case it might be deeper than I thought, but in the wrong way.

Looking for a torn piece in the liner seems more straightforward, though with the murk and trees, still not an easy one. Can the water fall be closed off for a while to let water level decrease further?

Answered below... yes, but I don't want to kill the fish, so it's complicatd.

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