As far as i remember the original state could be used to emulate fountains with a pipe spilling from above onto a (stone) structure - but the intent was for the whole water to be gone the moment the pipe is removed or connected to machinery. Permanent water as a consequence of breaking pipes or leaving them spilling freely (which would be necessary for a permanent pond) was never intended, though.
My post should hence correctly state "aqueducts have always been the only intended way to create and move permanent water". Thanks for correcting.