Gradually decaying overflow of water will use kinetic energy of ALREADY FLOWING water in long pipe (which slows down gradually), plus potential energy dropping level of water in main tank. No energy conservation violation will be detected.

Simplify you problem by considering flow of steel balls rolling in the long pipe. Their inertia will make some of balls rize 100 m and overflow, but at the expense of taking kinetic energy of long chain of balls in the horizontal part of the pipe.


About something not related to this experiment, but which you also mentioned in your earlier post.

Non-material objects CAN move FTL. Say, shadow, edge of scissors, even beam of lifht (but not the photons!) can move FTL - say, when you swing you flashlight across the night sky quickly, you can make photons from the flashlight to arrive to one distant corner of universe (say, 15 billion light years away on the East) only one second (or much less) later than to another distant corner (say,15 billion light years in the opposite direction - on the West).

No contradiction to special relativity because those are all non-material objects, thus they can not transmit information (=energy) with FTL speed.
Indeed, try to think how to transmit any message from East to West (or from Earth to any point) with FTL speed by any of the above non-material objects - and you surely will not be able to find a way to do that.