So as not to confuse Guest, in case this Guest is the same Guest that posted this:Soakway thread.
The general parameters of soakways and solar evaporation ponds are similar. You can convert a soakway to a solar evaporation pond with the addition of 2) above. (A liner of some sort)
However, soakways tend to be deeper and smaller in diameter than solar ponds, and may be less efficient if converted.
I recommend "Soakways and Solar Ponds, the Myths and Mysteries Revealed" published by LynDoor™ Press.